混炼温度对溴化丁基橡胶性能影响机理分析

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英文篇名：Mechanism analysis of effect of mixing temperature on properties of bromobutyl rubber 作者：苏俊杰 ; 魏雪峰 ; 崔珅 ; 赵季若 ; 冯莺 英文作者：SU Jun-jie;WEI Xue-feng;CUI Shen;ZHAO Ji-ruo;FENG Ying;Shandong Provincial Key Laboratory of Olefinic Catalysis and Polymerization/Key Laboratory of Rubber-plastics of Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastic,Qingdao University of Science and Technology; 关键词：溴化丁基橡胶 ; 混炼温度 ; 焦烧时间 ; 硫化速率 ; 交联密度 ; 烯丙基溴 英文关键词：brominated butyl rubber;;mixing temperature;;scorch time;;curing rate;;crosslinking density;;allyl bromide 中文刊名：HCXF 英文刊名：China Synthetic Rubber Industry 机构：青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室/山东省烯烃催化与聚合重点实验室; 出版日期：2019-03-15 出版单位：合成橡胶工业 年：2019 期：v.42 基金：国家自然科学基金资助项目(51173088) 语种：中文; 页：HCXF201902017 页数：4 CN：02 ISSN：62-1036/TQ 分类号：70-73

摘要

从溴化丁基橡胶(BIIR)的分子结构角度研究了混炼温度对溴化丁基橡胶性能的影响规律,并进行了机理分析。结果表明,随着混炼温度的增加,BIIR的焦烧时间先缩短后延长,硫化速率先加快后减慢,扯断伸长率和撕裂强度呈先下降后上升的趋势,邵尔A硬度、定伸应力和交联密度均呈先增加后减少的趋势。随着混炼温度的升高,硫化胶的损耗因子先减小后增大,玻璃化转变温度先升高后下降,BIIR分子链的仲位烯丙基溴向伯位烯丙基溴转化,且溴化氢脱除反应加剧。
        Effect of mixing temperature on properties of brominated butyl rubber(BIIR) was studied from the view of molecular structure of BIIR, and the mechanism was analyzed. The results showed that with the increasing mixing temperature, the scorch time of BIIR was shorten and then extended, vulcanization rate was accelerated and then slowed down, elongation at break and tear strength decreased first and then increased, and Shore A hardness, modulus and crosslinking density increased first and then decreased. With the increase of mixing temperature, the loss factor of vulcanizate first decreased and then increased, glass transition temperature first increased and then decreased, the secondary allyl bromide of BIIR molecular chain transformed to primary allyl bromide, and the hydrogen bromide removal reaction was more intense.

引文

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