引用本文:
王莲芝, 韩孝族, 彭辉, 杨震, 赵国琴, 张庆余. 丁腈羟平均官能度对固化反应及固化物性能的影响[J]. 应用化学,
2016, 4(5): 31-34.
Citation: Wang Lianzhi, Han Xiaozu, Peng Hui, Yang Zhen, Zhao Guoqin, Zhang Qingyu. ON THE INFLUENCE OF FUNCTIONALITY OF HTBN ON THE CURING PROCESS AND THE PROPERTIES OF CURED RUBBER[J]. Chinese Journal of Applied Chemistry, 2016, 4(5): 31-34.
Citation: Wang Lianzhi, Han Xiaozu, Peng Hui, Yang Zhen, Zhao Guoqin, Zhang Qingyu. ON THE INFLUENCE OF FUNCTIONALITY OF HTBN ON THE CURING PROCESS AND THE PROPERTIES OF CURED RUBBER[J]. Chinese Journal of Applied Chemistry, 2016, 4(5): 31-34.
丁腈羟平均官能度对固化反应及固化物性能的影响
摘要:
以过氧化氢为引发剂,加入巯基乙醇或丙烯酸羟乙酯,合成了四种不同官能度的端羟基丁二烯-丙烯腈共聚物。以异佛尔酮二异氰酸酯为固化剂,N,N'-二羟丙基苯胺为链延伸剂,制得一系列多嵌段聚氨酯弹性体,研究了平均官能度对固化反应速度及固化物力学性能、动态力学性能、热性能和耐油性能的影响规律。
English
ON THE INFLUENCE OF FUNCTIONALITY OF HTBN ON THE CURING PROCESS AND THE PROPERTIES OF CURED RUBBER
Abstract:
Hydroxy-terminated butadiene-acrylonitryle copolymer (HTBN) was synthesized by using H2O2 as initiator. Four samples of HTBN with, fn=1.94, 2.32,2.64 and 3.02, respectively, were prepared by adding HOCH2CH2SH or 2-hydroxyethyl acrylate during polymerization. Isophorone diisocyanate (IPDI) was used as curing agent and N,N'-bis(hydroxypropyl) aniline (Isonol C-100)as chain extender.The results showed that the curing rate is dependent on fn, the higher the fn, the faster the rate. The crosslinking density of the cured rubber increascs with increasing fn, showing influence on the properties of the rubber. The tensile strength and hardness increase with increasing fn, with the elongation being decreased.HTBN elastomer with fn=1.93 is found to be a promising damping material due to the constant tanδ over a wide temperature range. Two transition temperatures were observed for all HTBN rubbers studied. Increase off fn is of benefit to the oil- and heat resistance of the cured rubber.
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