An Alkenyl Polyethylene Glycol Binder: Room Temperature Curing Properties via Nitrile Oxide, Thermodynamics and Kinetics Study

IF 1 4区 化学 Q4 POLYMER SCIENCE
Yonglin Lei,  Jichuan Huo
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引用次数: 0

Abstract

Reducing the stress defects of grain caused by high temperature curing is of great significance to the safety and performance of propellant. Here, a series of alkenyl polyethylene glycol copolymers (APEG) were designed and synthesized using polyethylene glycol (PEG) samples and allyl glycidyl (AGE) and glycidol as raw materials. The APEG copolymers were cured at room temperature with nitrile oxide prepared in situ from p-benzenedinitrile oxide and triethylamine. The chemico-physical properties of the precursors and cured systems were discussed. The results showed that the tensile strength, the elongation at break and hardness decreased from the case of PEG 400 to the case of PEG 4000 and increased from the case of PEG 4000 to the case of PEG 6000. And the elongation at break of the cured APEGs decreased, the tensile strength increased with the increase of curing agent’s contents. The in situ IR of this cured system was analyzed and k = 0.1888 g/(mol min) at 27°C. The initial thermal decomposition of this cured system was also discussed. The activation energy and reaction order were calculated respectively as 163.886 kJ/mol and 0.96. The results suggested that the prepared binder could be cured rapidly at room temperature and had greater heat release during high temperature decomposition. Based on the excellent room curing performance and great heat release of this work, The APEG copolymers provide a feasible strategy to solve the problems caused by the high temperature curing.

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烯基聚乙二醇粘合剂:通过氧化腈的室温固化特性、热力学和动力学研究
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来源期刊
Polymer Science, Series B
Polymer Science, Series B 化学-高分子科学
CiteScore
1.80
自引率
8.30%
发文量
58
审稿时长
>0 weeks
期刊介绍: Polymer Science, Series B is a journal published in collaboration with the Russian Academy of Sciences. Series B experimental and theoretical papers and reviews dealing with the synthesis, kinetics, catalysis, and chemical transformations of macromolecules, supramolecular structures, and polymer matrix-based composites (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed
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