Properties of high cis-1,4 content hydroxyl-terminated polybutadiene and its application in composite solid propellants

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY Defence Technology(防务技术) Pub Date : 2024-10-01 DOI:10.1016/j.dt.2024.04.014
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Abstract

In this paper, high cis-1,4 content hydroxyl-terminated polybutadiene (cis-HTPB) with different molecular weights was prepared through the oxidative cracking process using cis-butadiene rubber as raw material. Firstly, this article comprehensively compared the differences between cis-HTPB and conventional I-HTPB in terms of molecular weight distribution, functionality, viscosity, molecular polarity, and other physicochemical properties, which provided effective data support for its subsequent application. In addition, the reaction kinetics study showed that cis-HTPB with isocyanate curing agent has high reactivity, allowing it to be rapidly cured at low temperatures, and the cured elastomers had excellent mechanical properties, with tensile strength and elongation up to 1.89 MPa and 1100%, respectively. It was also found that cis-HTPB has extremely excellent low-temperature resistance, and the glass transition temperature (Tg) of its cured elastomer is as low as −101 °C. Based on the above studies, cis-HTPB is applied as a binder in composite solid propellants for the first time to investigate its practical performance, and the results indicated that cis-HTPB-based propellants have excellent process and mechanical properties.

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高顺式-1,4 含量羟基封端聚丁二烯的性能及其在复合固体推进剂中的应用
本文以顺丁橡胶为原料,通过氧化裂解工艺制备了不同分子量的高顺式-1,4 含羟基封端聚丁二烯(顺式-HTPB)。首先,本文全面比较了顺式-HTPB 与传统 I-HTPB 在分子量分布、官能度、粘度、分子极性等理化性质方面的差异,为其后续应用提供了有效的数据支持。此外,反应动力学研究表明,顺式-HTPB 与异氰酸酯固化剂的反应活性高,可在低温下快速固化,固化后的弹性体具有优异的机械性能,拉伸强度和伸长率分别高达 1.89 兆帕和 1100%。研究还发现,顺式-HTPB 具有极其优异的耐低温性能,其固化弹性体的玻璃化转变温度(Tg)低至 -101 ℃。在上述研究的基础上,首次将顺式-HTPB 用作复合固体推进剂的粘合剂,研究其实用性能,结果表明顺式-HTPB 基推进剂具有优异的工艺性能和机械性能。
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来源期刊
Defence Technology(防务技术)
Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering
CiteScore
8.70
自引率
0.00%
发文量
728
审稿时长
25 days
期刊介绍: Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.
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