Improving Mechanical Properties of Carboxyl-Terminated Polybutadiene (CTPB) Binder System Using a Cure Accelerator.

Xiao Qu, Peixuan Hu, Xinyi Ma, Yunfei Liu, Hongtao Yang, Wei Zhang, Yu Chen

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Article in Molecules (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Xiao QuSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

Peixuan HuSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

Xinyi MaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

Yunfei LiuXi'an Modern Chemistry Research Institute, Xi'an 710065, China.

Hongtao YangXi'an Modern Chemistry Research Institute, Xi'an 710065, China.

Wei ZhangXi'an Modern Chemistry Research Institute, Xi'an 710065, China.

Yu ChenSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

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6 · The paper itself

Abstract

To address the issues of slow curing rate, post-curing reactions, and suboptimal mechanical properties in the carboxyl-terminated polybutadiene (CTPB)/epoxy resin (EP) binder system used for solid propellants, this study optimized the curing system by introducing 593 aliphatic amine compounds containing primary and secondary amine groups as a cure accelerator. It is found that the incorporation of the cure accelerator improved the fracture strength and elongation at break of the CTPB/EP binder system. With the addition of 0.3 wt.% cure accelerator, the tensile fracture strength increased to 0.37 MPa, while the elongation at break reached 655%. Moreover, augmenting the quantity of cure accelerator can substantially elevate the crosslink density and gel fraction of the binder system. When the addition reaches 0.3 wt.%, the crosslink density is 4.3 × 10

Indexed as

binder systemcarboxyl-terminated polybutadienecure acceleratormechanical properties

Identifiers

PMID41599333

DOI10.3390/molecules31020284

PMCPMC12843691

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