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2014•Journal of Solid Rocket TechnologyRequires access

Preparation of one polyurethane material based on epoxidation hydroxyl-terminated polybutadiene

Deng Zhao-zha

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Abstract

The polyurethane material based on Epoxidized Hydroxyl-terminated Polybutadiene( EHTPB) was synthesized with N,N-di( 2-hydroxypropyl) aniline( Is) as chain extender and toluene diisocyanate( TDI) as a curing agent. The effects of epoxy value of EHTPB,curing time,molar ratio of Is to EHTPB,NCO / OH ratio and filler dosage on the properties of the polyurethane were investigated. The results show that the optimal molar ratio of Is to EHTPB is 1. 54 and the best NCO / OH ratio is 2. 05. The best amount of catalyst is 0. 075%,the filler dosage of ZnO is 4% and SiO2 is 1. 47%. At 70℃,the best cure time is 5 days. Moreover,the mechanical properties of polyurethane material prepared with EHTPB are superior to those of material with HTPB.

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What this paper is about

The polyurethane material based on Epoxidized Hydroxyl-terminated Polybutadiene( EHTPB) was synthesized with N,N-di( 2-hydroxypropyl) aniline( Is) as chain extender and toluene diisocyanate( TDI) as a curing agent. The effects of epoxy value of EHTPB,curing time,molar ratio of Is to EHTPB,NCO / OH ratio and filler dosage on the properties of the polyurethane were investigated. The results show that the optimal molar ratio of Is to EHTPB is 1. 54 and the best NCO / OH ratio is 2. 05. The best amount of catalyst is 0. 075%,the filler dosage of ZnO is 4% and SiO2 is 1. 47%. At 70℃,the best cure time is 5 days. Moreover,the mechanical properties of polyurethane material prepared with EHTPB are superior to those of material with HTPB.

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Available abstract

The polyurethane material based on Epoxidized Hydroxyl-terminated Polybutadiene( EHTPB) was synthesized with N,N-di( 2-hydroxypropyl) aniline( Is) as chain extender and toluene diisocyanate( TDI) as a curing agent. The effects of epoxy value of EHTPB,curing time,molar ratio of Is to EHTPB,NCO / OH ratio and filler dosage on the properties of the polyurethane were investigated. The results show that the optimal molar ratio of Is to EHTPB is 1. 54 and the best NCO / OH ratio is 2. 05. The best amount of catalyst is 0. 075%,the filler dosage of ZnO is 4% and SiO2 is 1. 47%. At 70℃,the best cure time is 5 days. Moreover,the mechanical properties of polyurethane material prepared with EHTPB are superior to those of material with HTPB.

Key concepts: Polyurethane, Polybutadiene, Hydroxyl-terminated polybutadiene, Toluene diisocyanate, Curing (chemistry), Materials science, Molar ratio, Epoxy

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