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Polymers (Basel). 2017 May 30;9(6). pii: E200. doi: 10.3390/polym9060200.

Performance and Kinetics Study of Self-Repairing Hydroxyl-Terminated Polybutadiene Binders Based on the Diels⁻Alder Reaction.

Author information

1
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. growean_leong@163.com.
2
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. leejie@bit.edu.cn.
3
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. xminbit@bit.edu.cn.
4
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. girlping3114@bit.edu.cn.
5
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China. yjluo@bit.edu.cn.

Abstract

Based on the Diels⁻Alder reaction and hydroxyl-terminated polybutadiene (HTPB) binders of solid propellants, two novel compounds-furfuryl-terminated polybutadiene (FTPB) and trifurfuryl propane (TFP)-were designed and synthesized, and their structures were characterized. A new kind of reversible Diels⁻Alder reaction system was formed by FTPB as main resin, N,N'-1,3-phenylenedimaleimide (PDMI) as curing agent and TFP as chain extender. The results showed that this system had good mechanical properties with a tensile strength of 1.76 MPa and a tensile strain of 284% after curing, and the repair efficiency of the crack was 88%. Therefore, it could be used as a novel binder of energetic materials such as solid propellant and PBX explosives to provide them with self-repairing characteristics and improve the reliability for application.

KEYWORDS:

Diels–Alder reaction; binder; hydroxyl-terminated polybutadiene; self-repairing; solid propellant

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