Expert Panel



Personal Details


Dr.V.Sekkar

Name

:

Dr.V.Sekkar

Date of Birth

:

04-03-1958

Native Place

:

Cuddalore, Tamil nadu

Community

:

Brahmin

Religion

:

Hindu

Nationality

:

Indian

Communication Details

:

9400770388 9447389674

Email

:

vsekkar@gmail.com

Educational Qualifications

  • B.Sc (Chemistry) 1978, Annamalai University, TamilNadu, I Rank
  • M.Sc (Chemistry) 1980, Annamalai University, TamilNadu
  • M.Sc (Aerospace Engineering), 1992, IISc, Bangalore; Topic - Synthesis and Characterization of Copolyurethanes based on Hydroxyl Terminated Polybutadiene as Propellant Binders
  • Ph.D (Aerospace Engineering), 1995, IISc, Bangalore – ‘Studies on hydroxyl terminated polybutadiene based copolyurethanes as solid propellant binders: Characterization and modeling of network parameters’
  • PDF – NUS, Singapore 2002-3

Present Occupation

Professor Emeritus, School of Environmental Studies, Cochin University of Science & Technology (CUSAT), Kochi, 682 022.

Previous Positions Held

Last position held

:

Scientist ‘SG’, Vikram Sarabhai Space Centre (VSSC), Indian Space Research Organization (ISRO), Trivandrum, Kerala.

Date of Joining VSSC/ISRO

:

20-07-1981

Ph.D. Guidance

:

One student- degree awarded from Kerala

Date of Superannuation

:

Three students registered with CUSAT.

University in 2018

:

20-07-1981

Major projects being handled currently

  • Water purification using carbon aerogel
  • Development of Aluminum ion battery (AIB)
  • Development of Potassium ion battery (KIB)
  • Porous carbons based EMI shielding for Defense applications

Major Functions in VSSC/ISRO

  • Development and production of vibration isolators for launch vehicles (Rockets) and satellites. Totally about types of vibration isolators developed and currently in use
  • Development of silicone based vacuum bagging material for fabrication rocket nozzle liners and throats.
  • Development of silicone based thermal boot for flex nozzle for gSLV-Mk III
  • Research on the development of advanced materials.

Major Achievements

  • Developed about 22 types of silicone based vibration isolators that are currently used in launch vehicles and satellites.
  • Indigenized vacuum bagging material for fabricating rocket nozzle liners and throats
  • Worked on high erosion tolerant, high tear strength, thermal boot material for flex nozzle application
  • Developed silica aerogel and silica aerogel blankets for cryo insulation applications.
  • Developed Carbon aerogel composites for multipurpose TPS aiming towards weight reduction by about 60%.
  • Carbon aerogel based hydrogen storage for cryo propulsion and fuel cell applications.
  • Carbon aerogel based electrodes for aqueous and non-aqueous super capacitors (achieved high capacitance value for non-aqueous systems. (40.8 Farads/g)
  • Developed nano Zirconia based thermal barrier coatings for combustion chambers and nozzles
  • Low density thermal protection systems (TPS) based on silicon oxycarbide (SiOC) and SiC which can be used to fabricate very light space mirrors
  • Porous ceramics through sacrificial filler route : preparation of catalytic support, light weight high temperature durable TPS
  • Carbon foams for high temperature TPS (3000C)
  • Low density ablatives based on phenolic and siloxane systems
  • Low density flexible TPS for PSLV, GSLV, S-200, ATVP
  • Developed IR reflective and anti-erosion coatings
  • Silicone foams and sponges
  • Graphitic carbo-nitride for photo catalytic decomposition of water and super capacitors.
  • Indigenized conformal coating (Parylene-C) for electronic chips used in launch vehicles and satellites
  • Developed dimer acid based polyamide for adhesive and composite applications
  • Developed Vinyl ester polymers for composites
  • Modelled HTPB based urethane network parameters and extended to propellant formulations
  • Developed models for gelation kinetics for propellant applications
  • Thermal decomposition studies on polymers
  • Guided students to Ph.D; One awarded in 2018; Three pursuing for Ph.D under CUSAT. MTech/MSc Internship projects 12 students

Research Programmes Purrently/Proposed To Be Pursued

1.Development of Aluminum ion battery (AIB)v

2.Development of Potassium ion battery (KIB)v

3.Development of EMI shielding materials

4.Development of silica aerogels

4.1 Synthesis of silica aerogels through Super Critical Drying (SCD) and Ambient pressure drying (APD) processes.

4.2 Synthesis of methyl group and other functional groups substituted aerogels

4.3 Organic-inorganic hybrid aerogels

4.4 Silica aerogel infiltrated felt fabric (Felt material being ceramic, glass or PET) flexible super insulation based light weight attire for soldiers functioning at high altitude combat zones, such as Siachen and Drass as well as super insulation for cryo insulation for ISRO launch vehicle programmes. (Defence & ISRO)

4.5 Hydrophobic aerogel-polmeric foam composites for petroleum oil removal from oil spills. (Civil/environmental protection)

4.6 Silica aerogel infiltrated felt fabric as insulation for oil pipe lines that transport molten hot petroleum crude from offshore deep sea oil wells to onshore storage tanks. (Civil)

4.7 SiOC aerogels derived through pyrolysis of methylsilica aerogels for electrode materials for Li ion cells. (ISRO, Defence and Civil)

Development of carbon aerogels

5.1 Development of Resorcinol-Formaldehyde (RF) aerogels through SCD and APD routes and carbonization to carbon aerogels using a variety of catalysts that would have a significant bearing on pore morphology

5.2 Face sheeted carbon aerogel composites for ultra high temperature (3000C) durable multipurpose thermal protection system (TPS) for reusable launch vehicle (RLV), MSTO (multistage to orbit) and SSTO (single stage to orbit) programmes. The TPS would also satisfy the structural requirements. (ISRO & Defense)

5.3 Carbon aerogel based hydrogen storage for Cryo propulsion and fuel cell applications. Aim to achieve reduction in the liquid hydrogen tank size and weight. (ISRO/Space)

5.4 Electrode material for aqueous and non-aqueous super capacitors. Chemically activated carbon aerogels gave very high specific capacitance for non-aqueous super capacitors (45 F/g with an ESR of 3 ) (ISRO, Defence and Civil)

5.5 Carbon aerogels for Carbon-di-oxide absorption (25% by weight at 25C and 40 bar pressure)(Studies at BHU-Prof SK Srivatsava’s lab)

5.6 Water purification with carbon aerogels.

6.High tear, erosion resistant silicone based thermal boot material, for flex nozzle application. (ISRO & DRDO)

7.Facile route to prepare silicone based vacuum bagging material for the fabrication of rocket nozzle liners and throats (ISRO)

8. Development of carbon foams (both open and closed cell morphologies) for high temperature insulation

8.1 Phenol-formaldehyde polymer based carbon foams through the use of sacrificial fillers, such as PMMA and polystyrene microspheres

8.2 Syntactic foams with phenolic microballoons and carbonization thereafter.

8.3 Using foam templates, such as polyimide foams

8.4 Pitch based highly thermally conducting carbon foams as thermal sinks to be used in satellites

9.Low density SiOC composites

9.1 Light weight high temperature (1000C) and air oxidation durable SiOC insulation tiles for RLV missions as a replacement of existing silica tiles, derived from thermal treatment of ceramic fibre reinforced polymethylselsisquioxane (PMSQ) composites.

9.2 Porous SiOC material for Li and Na ion batteries

10. Low density, high temperature air oxidation durable SiC composites, for missiles and reusable launch vehicle leading edge, fin and nose cone structures, derived from phenolic resin and metallic Si.

11. Porous catalytic supports for catalysts, such as nano Iridium, Platinum, palladium, etc. for hypergolic mono propellant, involving hydrazines and HAN (hydroxyl ammonium nitrate) (Space & Defense)

12. Low density high performance ablative composites based on phenolic and PMSQ systems (Defence and ISRO)

13. Advanced structural composites based on allyl and bismaleimide compounds. (Space, Defense and civil)

14. Thermoplastic composites for high performance aerospace structures (Aviation industry, Defence and ISRO)

15. Hydrophobic coating over polar surfaces (Coating with nano methyl silica, silicone over polyurethane foam (PUF), metals and ceramics)

16. Silicone foams (Space &Defense)

17. Water desalination

17.1 through carbon aerogel based capacitative deionization (CDI) technique. (Civil)

17.2 with sub nanometric open porous carbon and ceramic substrates.

18. Graphitic carbo-nitride for photo-catalytic decomposition of water, super capacitors. (Space)

19. Boron carbide (B4C) composites from polymer precursors for bullet proof applications (Defense)

20. Other miscellaneous topics.

Publications

Total publications

:

64

In international peer reviewed journals

:

37

National seminar publications

:

27

H index

:

14

Citations

:

620

1.Ravindra Kumar Bhardwaj, Homen Lahan, , Bibin John, V. Sekkar and Aninda J. Bhattacharyya, “Employing a Pelletized Compact of Li2S and Carbon Aerogel Nanoparticles as a High-Capacity Cathode in Li-metal/Sulfur and Li metal Free/Sulfur Batteries” communicated to Jl of materials Chemistry A

2.Remya Balakrishnan, Lity Alen Varghese, V.Sekkar, “Urethane network formation between castor oil based ester polyol and polyanilinepolyisocyanate: DSC assisted Kinetic analysis” Communicated to Polymer Bulletin; under review

3.Thakur Sudesh Kumar Raunija and V. Sekkar “Ignition resistance coating for semicryo engine combustion gas duct-Preparation, characterization and implementation” communicated to Journal of Materials Processing Technology; Under review.

4.Renjith P. K., Sarathchandran C., SivanandanAchary V., Chandramohanakumar N, Sekkar V., “Micro-cellular polymer foam supported silica aerogel: Eco-friendly tool for petroleum oil spill cleanup”, Journal of Hazardous Materials, Volume 415, 5 August 2021, 125548; Doi: https://doi.org/10.1016/j.jhazmat.2021.125548

5.Ashish Bhatnagar, AnantP.Pandey, M. Sterlin Leo Hudson, Pawan K. Soni, Satish K. Verma, Vivek Shukla, V. Sekkar, Manoj Tripathi, O.N. Srivastava, “Economical synthesis of highly efficient and tunable carbon aerogels for enhanced storage of CO2 emitted from energy sources” International Journal of Energy Research, Volume 45, Issue4, 25 March 2021, Pages 6285-6292; https://doi.org/10.1002/er.6251

6.Anant Prakash Pandey, Ashish Bhatnagar, Vivek Shukla, Pawan K. Soni, Sweta Singh, Satish K. Verma, M. Shaneeth, V. Sekkar, O.N. Srivastava, “Hydrogen storage properties of carbon aerogel synthesized by ambient pressure drying using new catalyst triethylamine”, International journal of hydrogen energy, 45 (2020) 30818-30827. Doi: 10.1016/j.ijhydene.2020.08.145

7.C. Sarathchandran, Li Ziang, Robert A. Shanks, C. H. Chan, V. Sekkar, Sabu Thomas, “Crystallization kinetics, morphology and spherulite growth in poly(trimethylene terephthalate) modified with bisphenol-A diglycidyl ether”, Journal of Thermal Analysis and Calorimetry, 141 (2020), pp727–737. Doi: https://doi.org/10.1007/s10973-019-09047-1

8.Remya Balakrishnan, P.B. Soumyamol, K.P. Vijayalakshmi, Lity Alen Varghese, R. Rajeev, S.K. Manu & V. Sekkar, “Kinetic analysis of urethane formation between castor oil-based ester polyol and 4,4’-diphenyl methane diisocyanate”, (2020) Indian Chemical Engineer, DOI: https://doi.org/10.1080/00194506.2020.1760947

9.V. Sivanandan Achari, Raichel Mary Lopez, A.S. Rajalekshmi, S. Jayasree, BindiaRavindran, V. Sekkar, “Scavanging nitrophenol from aquatic effluents with triethylamine catalyzed ambient pressure dried carbon aerogel” Journal of Environmental Chemical Engineering, 8 (2020) 103670; Doi: https://doi.org/10.1016/j.jece.2020.103670

10. Alex, A.S., Bhuvaneswari, S., Sreenivas, N., Gouri C., Sekkar V, “ Short silica fibre-reinforced polymethylsilsesquioxane–phenolic interpenetrating networks: exploration for use as ablative thermal protection system in aerospace”, Polymer Bulletin, 76, 3941–3956 (2019). https://doi.org/10.1007/s00289-018-2579-4

11. Ancy Smitha Alex, Deepthi Thomas, S. K. Manu, N. Sreenivas, V. Sekkar, C. Gouri, “Addition-cure, room temperature vulcanizing silicone elastomer based syntactic foams with glass and ceramic micro-balloons”, Polymer Bulletin, 75, 747–767 (2018). https://doi.org/10.1007/s00289-017-2052-9.

12. Ancy Smitha Alex, Bhuvaneswari S, SarathChandran C, Jayalatha T, Sekkar V, Gouri C., “Microstructure and phase evolution in pyrolysed short fibre reinforced polymethylsilsesquioxane-phenolic interpenetrating networks”, Journal of Analytical and Applied Pyrolysis 129 (2018) 241–247; Doi: https://doi.org/10.1016/j.jaap.2017.11.006

13. V. Sekkar, Ancy Smitha Alex, Vijendra Kumar, and G. G. Bandyopadhyay, “Theoretical Evaluation of Crosslink Density of Chain Extended Polyurethane Networks Based on Hydroxyl Terminated Polybutadiene and Butanediol and Comparison with ExperimentalData”,Journal of Energetic Materials,2018 Jan 2;36(1):38-47;DOI: https://doi.org/10.1080/07370652.2017.1307884

14. Ancy Smitha Alex, R.S. Rajeev, V. Sekkar & C. Gouri, “The role of organoclay on the properties of Polymethylsilsesquioxane: A systematic study”, Journal of Macromolecular Science, Part A: Pure and Applied Chemistry. 2017 Dec 2; 54(12):885-93; https://doi.org/10.1080/10601325.2017.1340076

15. Ancy Smitha Alex, Ananda Lekshmi M.S., Sekkar V., Bibin John, Gouri C. and Ilangovan S.A., “Microporous carbon aerogel prepared throughambient pressure drying route as anodematerial for lithium ion cells”, Polymers for Advanced Technologies, 2017 Dec 1; 28(12):1945-50; doi: https://doi.org/10.1002/pat.4085

16. Ancy Smitha Alex, R.S. Rajeev, K. Krishnaraj, N. Sreenivas, S.K. Manu, C. Gouri & V.Sekkar, “Thermal protection characteristics of polydimethylsiloxane - organoclay nano composites”, Polymer Degradation and Stability, 2017 Oct 1; 144:281-91; doi: https://doi.org/10.1016/j.polymdegradstab.2017.08.026

17. Ancy Smitha Alex, Vijendra Kumar, G.G. Bandyopadhyay & V. Sekkar, “A Fast and Effective Pyridine-Free Method for the Determination of Hydroxyl Value of Hydroxyl- Terminated Polybutadiene and Other Hydroxyl Compounds” Journal of Energetic Materials, 2017 Jul 3; 35(3):292-9 doi: https://doi.org/10.1080/07370652.2016.1178827

18. Ancy Smitha Alex, Vijendra Kumar, Rajeev R. S., Supriya N., Manu S. K., Gouri C., Bandyopadhyay G. G., Sekkar V, “Effect of organically modified montmorillonite clay on theproperties of hydroxy terminated polydimethylsiloxane: Journal of Adhesion Scienceand Technology,2017 Jul 3;31(13):1496-513;doi:https://doi.org/10.1080/01694243.2016.1264658

19. V. Sekkar, Ancy Smitha Alex, Vijendra Kumar and G. G. Bandyopadhyay, “Pot life extension of hydroxyl terminated polybutadiene based solid propellant bindersystem by tailoring the binder polymer microstructure”, Journal of Macromolecular Science, Part A.,2017 Mar 4; 54(3):171-5, doi: https://doi.org/10.1080/10601325.2017.1265403

20. Sweta Singh, Ashish Bhatanagar, Viney Dixit, Vivek Shukla, M.A.Shaz, A.S.K. Sinha, O.N.Srivastava and V.Sekkar, “Synthesis Characterization and Hydrogen Storage Characteristics of Ambient Pressure Dried Carbon Aerogel”; International journal of hydrogen energy, 2016 Feb 9; 41(5):3561-70; doi: https://doi.org/10.1016/j.ijhydene.2015.12.174

21. Sekkar V, Raunija TS., “Issues Related with Pot Life Extension for Hydroxyl‐Terminated Polybutadiene‐Based Solid Propellant Binder System”, Propellants, Explosives, Pyrotechnics, 2015 Apr 1;40(2):267-74; doi: https://doi.org/10.1002/prep.201400054

22. Sekkar V, Raunija TS, “Hydroxyl-Terminated Polybutadiene-Based Polyurethane Networks as Solid Propellant Binder-State of the Art”, Journal of Propulsion and Power, 2014 Oct 29; 31(1):16-35; doi: https://doi.org/10.1002/prep.201400054

23. Sekkar V., “Comparison between crosslink densities derived from stress–strain data and theoretically data evaluated through the α‐model approach for a polyurethane network system based on hydroxyl terminated polybutadiene and isophorone‐diisocyanate”, Journal of Applied Polymer Science, 2010 Jul 15; 117(2):920-5; doi: https://doi.org/10.1002/app.31643

24. Manu SK, Sekkar V, Scariah KJ, Varghese TL, Mathew S., “Kinetics of glycidylazide polymer‐based urethane network formation”, Journal of applied polymer science, 2008 Oct 15; 110(2):908-14; doi: https://doi.org/10.1002/app.28639

25. Sekkar V, Narayanaswamy K, Scariah KJ, Nair PR, Sastri KS, Ang HG, “Evaluation by various experimental approaches of the crosslink density of urethane networks based on hydroxyl‐terminated polybutadiene”, Journal of applied polymer science, 2007 Mar 5; 103(5):3129-33; doi: https://doi.org/10.1002/app.24751

26. Sekkar V, Narayanaswamy K, Scariah KJ, Nair PR, Sastri KS, Ang HG, “Studies on urethane–allophanate networks based on hydroxyl‐terminated polybutadiene: Modeling of network parameters and correlation to mechanical properties”, Journal of applied polymer science, 2006 Sep 5; 101(5):2986-94, doi : https://doi.org/10.1002/app.23541

27. Sekkar V, Gopalakrishnan S, Ambika Devi K, “Studies on allophanate–urethane networks based on hydroxyl terminated polybutadiene: effect of isocyanate type on the network characteristics”, European Polymer Journal, 2003 Jun 1; 39(6):1281-90; doi: https://doi.org/10.1016/S0014-3057(02)00364-6

28. V.Sekkar, S.Venkatachalam, and K.N.Ninan; “Rheokinetic studies on the formation of urethane networks based on based on Hydroxyl terminated polybutadiene”, European Polymer Journal, 38, (2001) pp.169-178; doi: https://doi.org/10.1016/S0014-3057(01)00106-9

29. V.Sekkar, K.Ambika Devi and K.N.Ninan, “Rheokinetic evaluation on the formation of urethane networks based on hydroxyl terminated polybutadiene”, J.Appl.Polym.Sci., 79, (2001) pp. 1869-1876; doi: https://doi.org/10.1002/1097-4628(20010307)79:10<1869::AID-APP160>3.0.CO;2-7

30. V.Sekkar, S.S.Bhagwan, N.Prabhakaran, M.Rama Rao, and K.N.Ninan, “Polyurethanes based on hydroxyl terminated polybutadiene: Modelling of network parameters and correlation with mechanical properties”, Polymer, 41, (2000) pp. 6773-6786; doi: https://doi.org/10.1016/S0032-3861(00)00011-2

31. V.Sekkar, V.N.Krishnamurthy and S.R.Jain, “Characterization of copolyurethanes based on hydroxyl terminated polybutadiene and poly (12-hydroxy stearic acid-co-TMP)ester polyol as propellant binders : correlation between the resin structural characteristics and ultimate propellant mechanical properties”, Propellants, Explosives, Pyrotecnics, 23, (1998) pp. 246-253; doi: https://doi.org/10.1002/(SICI)1521-4087(199811)<246::AID-PREP246>3.0.CO;2-%23

32. V.Sekkar, V.N.Krishnamurthy and S.R.Jain, “Mechanical and swelling properties of copolyurethanes based on hydroxyl terminated polybutadiene and its hydrogenated analog”, Propellants, Explosives, Pyrotecnics, 22, (1997) pp. 289-295; doi: https://doi.org/10.1002/prep.19970220508

33. V,Sekkar, V.N.Krishnamurthy and S.R.Jain, “Kinetics of copolyurethane network formation”, J.Appl.Polym.Sci., 66, (1997) pp. 1795; doi: . https://doi.org/10.1002/(SICI)1097-4628(19971128)66:9<1795::AID-APP19>3.0.CO;2-U

34. V,Sekkar, M.Rama Rao, V.N.Krishnamurthy and S.R.Jain, “Modelling of polyurethane networks based on hydroxyl terminated polybutadiene and poly (12-hydroxy stearic acid-co-TMP)ester polyol: Correlation of network parameters with mechanical properties”, J.Appl.Polym.Sci., 62, (1996). pp. 2317; doi: https://doi.org/10.1002/(SICI)1097-4628(19961226)62:13<2317::AID-APP17>3.0.CO;2-%23

35. V.Sekkar, K.J.Scariah and M.Rama Rao, “Thermal degradation behaviour of copolyurethanes based on hydroxyl terminated polybutadiene and its hydrogenated analogs”, Eur.Polym.J., Vol.30, No.8, (1995) pp. 925-931; doi: https://doi.org/10.1016/0014-3057(94)90026-4

36. V.Sekkar, S.R.Jain and V.N.Krishnamurthy “Mechanical and swelling properties of HTPB based copolyurethane networks”, J.Appl.Polym.Sci., 48, (1993). pp. 1515-1523; doi: https://doi.org/10.1002/app.1993.070480902

Seminars

1.Ancy Smitha Alex, Vijendra Kumar, Rajeev R. S., Supriya N., Manu S. K., Gouri C., Bandyopadhyay G. G., Sekkar V, “Polydimethylsiloxane-organically modified montmorillonite based nano composite”, Proceeding of international conference on nanotechnology for better living vol. 3, No. 1, p. 111 doi:10.3850/978-981-09-7519-7nbl16-rps-111

2.Ancy Smitha Alex, Ananda Lekshmi. M.S, Sekkar. V ,Bibin John, Gouri. C , SA Ilangovan, “Ambient Dried Carbon Aerogel As An Anode Material For Li-ion Cells”, presented in MACRO, Thiruvananthapuram, Kerala,January 2017

3.AncySmitha Alex, R.S. Rajeev, JaminJoy, Sreelekshmi K.R, Vijendra Kumar , Bandyopadhyay.G.G, Sekkar. V & Gouri. C, “Thermal and Mechanical Evaluation of Organically Modified Clay Filled Polymethylsilsesquioxane”, presented in MACRO, Thiruvananthapuram, Kerala,January 2017

4.Shikha K.T, Jamin Joy, Ancy Smitha Alex, Nisha Hasmi K, Vijendra Kumar, Bandyopadhyay G.G, Sekkar V, “ Studies on Polysiloxane Derived Porous SiOC/ SiO2 Ceramics via Sacrificial Template Route” presented in MACRO, Thiruvananthapuram, Kerala,January 2017

5.V. Sekkar, Ancy Smitha Alex, Vijendra Kumar, G. G. Bandyopadhyay, “Theoretical Evaluation of Crosslink Density of Chain Extended Polyurethane Networks Based on Hydroxyl Terminated Polybutadiene and Butanediol and Comparison with Experimental Data”, HEMCE-2016, Hyderabad, February 2016

6.Vrjendrakumar and V.Sekkar “HPLC based Green Methodology for the Determination of Percentage Composition of Trimethylolpropane and Butanediol in the Mixture” in “International Conference on Advancements in Polymeric Materials; APM-2016” (12 to 14 February 2016 at Ahmedabad organized by Central Institute of Plastic Engineering & Technology; CIPET, Bhubaneswar).

7.Sreelekshmi K.R and V.Sekkar “Point of Trouble of Phenolic Resin: Investigating Robustness of the Method” was presented in National seminar on advanced analytical techniques (NSAAT 2016), mar 9-11 2016, January 2017 by

8.V.Sekkar, Deepthi Mohan, Vijendra Kumar and C.Sreekumaran Nair, “Studies on Hydroxyl terminated polybutadiene – Isophoronediisocyanate (IPDI) based solid propellant binders concerning with pot life extension” - -accepted for oral presentation at HEMCE-2011-Chandigar-9-11 Novemeber, 2011.

9.C.Sreekumaran Nair, V.Sekkar, SBM Guruvayurappan, S.Anitha and Desh Deepak, “Evaluation of Silicone Elastomer Compositions based on Cyclic Compressive, Static Tensile and DMA Tests for better damping characteristics”, MACRO-2010, IIT-Delhi, Dec.15-17, 2010

10.V.Sekkar, Vijendra Kumar and K.T.Shikha, “Correlation between Chemical Kinetic parameters and Viscosity Build during Cure Reaction between Hydroxyl Terminated Polybutadiene and Toluene-di-Isocyanate”, MACRO-2010, IIT-Delhi, Dec.15-17, 2010

11.V.Sekkar, “Evaluation of crosslink density for polyurethane networks based on hydroxyl terminated polybutadiene and isophorone-di-isocyanate – Resolving into chemical and physical components”, 97th Indian Science Congress, Thiruvanathapuram, jan03-07, 2010.

12.Hydroxyl terminated polybutadiene – isophorone-di-isocyanate based solid propellants: Binder – liner interface characteristics.,V.Sekkar, S.B.M.Guruvayurappan, C.Sreekumaran Nair and G.G.Bandhyopadhyay, HEMCE-2009, Pune, Dec. 7-9, 2009

13.V.Sekkar, Vijendra Kumar, N.Ramachndran Nair, “Connecting rheo-kinetics and chemical kinetics for hydroxyl terminated polybutadiene (HTPB) – Toluene di-isocyanate (TDI) curing system”, HEMCE-2009, Pune, Dec. 7-9, 2009.

14.V.Sekkar, C.Sreekumaran Nair, G.G.Bandyopadhyay, “Effect of strain rate on the network parameters of HTPB-IPDI based polyurethane networks”, - HEMCE-07 Seminar held at Chennai in Nov.2007.

15.S.K.Manu, V.Sekkar, K.J.Scariah, T.L.Varghese and S.Mathew, “Kinetics of polyurethane network formation based on GlycidylAzide Polymer and various di-isocyanate compounds”, HEMCE-07 Seminar held at Chennai in Nov.2007

16.V.Sekkar, K.Narayanaswamy, K.J.Scariah, P.R.Nair, – “Pot Life Extension of Solid Propellant Binder System by Tailoring the Binder Polymer Microstructure”, HEMCE 2005, DRDL, Hyderabad, Dec 2005.

17.V.Sekkar and How Ghee Ang, “Determination of Crosslink Density of Urethane-Allophanate Networks based on Hydroxyl Terminated Polybutadiene by various approaches and among the values so obtained”, , 4th IHEMCE (International High energy material Conferenec and exhibit) 2003, Pune, India

18.V.Sekkar, Christina. Y Tang and How Ghee Ang, “Urethane-Allophanate networks based on Hydroxyl Terminated Polybutadiene : Modelling of network parameters and correlation with mechanical properties”. , 34th International ICT-Conference , June 24-June27, 2003, Karlsruhe, FRG, on Energetic Materials-Reactions of propellants, Explosives and Pyrotechnics

19.V,Sekkar, K.Ambika Devi, K.N.Ninan, and K.S.Sastri “Rheokinetic studies on the urethane network formation during the pre-gel stage for HTPB based systems”, , oral presentation in 3rd IHEMCE, Thiruvananthapuram, Dec. 6-8, 2000.

20.K.J.Scariah, G.Chandrasekharan, V,Sekkar, and K.S.Sastri, “Correlation of Hydroxyl Terminated Polybutadiene (HTPB) based solid propellant mechanical properties with functionality type and molecular weight distributions of the binder”, presentation in 3rd IHEMCE, Thiruvananthapuram, Dec. 6-8, 2000.

21.V,Sekkar, S.S.Bhagwan, S.B.Iyer, N.Prabhakaran, M.Rama Rao, and K.N.Ninan, “Modelling of network parameters of polyurethane elastomers based on hydroxyl terminated polybutadiene”, ,, National Rubber Conference, (Rubber-2000), Indian Rubber Institute, New Delhi, Feb.18-19, 2000.

22.V,Sekkar, K.Ambika Devi and K.N.Ninan, “Kinetics of polyurethane network formation in HTPB-IPDI system: Influence of catalyst concentration on the cure kinetics”, , National seminar on polymers for the next millennium, March 26-29, 1999, A.C.College, Chennai.

23.V,Sekkar, M.Rama Rao, V.N.Krishnamurthy and S.R.Jain, “Effect of binder composition on the properties of composite solid propellants” Proceedings of the second IHEMSE, Dec. 8-10, 1998., I.I.T., Chennai.

24.V,Sekkar, M.Rama Rao, and S.R.Jain, “Modelling of polyurethane network properties: Correlation of binder properties of composite solid propellants”, Proceedings on Macro 98, Chennai, 1997.

25.V,Sekkar, S.S.Bhagwan, M.Rama Rao, V.N.Krishnamurthy and S.R.Jain, “Synthesis and characterization of urethane networks based on HTPB and HHTPB”, Proceedings on IHEMSE-96, Pune-1996

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