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Mechanical and Swelling Properties of Copolyurethanes based on Hydroxy-Terminated Polybutadiene and its hydrogenated analog

Sekkar, V and Krishnamurthy, VN and Jain, SR (1997) Mechanical and Swelling Properties of Copolyurethanes based on Hydroxy-Terminated Polybutadiene and its hydrogenated analog. In: Propellants, Explosives, Pyrotechnics, 22 (5). pp. 289-295.

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Abstract

Copolyurethane networks based on Hydroxy-Terminated Polybutadiene (HTPB) and Hydrogenated HTPB (HHTPB) have been synthesized using toluene diisocyanate as curing agent. Addition of HHTPB results in enhancement of properties, such as tensile strength and modulus, at nearly the same elongation values. It is possible to generate urethane networks with similar modulus and tensile strength with widely varying elongation values and vice versa by jointly altering the comonomer ratio, and the r (NCO/OH equivalent ratio) value. Dynamic mechanical studies have been made to determine the storage and loss moduli, and their variations with temperature. Solid propellant formulations processed with the copolyurethanes have been characterized for their mechanical strengths and burn rates.

Item Type: Journal Article
Additional Information: The copyright belongs to Verlag GmbH & Co. KGaA, Weinheim.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 26 Oct 2005
Last Modified: 27 Aug 2008 11:31
URI: http://eprints.iisc.ernet.in/id/eprint/3904

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