柠檬醛改性丁基橡胶的微观结构与硫化特性  

Microstructure and vulcanization characteristics of citral modified butyl rubber

作　　者：周晓兰[1] 冯宇[1] 邵红琪[1] 赵季若[1] 冯莺[1] 

机构地区：[1]青岛科技大学高分子学院橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2013年第3期230-233,共4页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51173088)

摘　　要：以氢化钠(NaH)/柠檬醛(CTA)为改性体系,采用Haake转矩流变仪制备了CTA改性丁基橡胶(IIR)(CTAIIR),用傅里叶变换红外光谱、核磁共振氢谱和凝胶渗透色谱表征了CTAIIR,分析了改性机理,并研究了CTAIIR混炼胶的硫化特性。结果表明,通过改性反应,在IIR分子链上引入了CTA的2个双键和1个羟基极性基团,控制NaH用量及延长CTA反应时间有利于提高CTA的反应效率,NaH/CTA/CC的最佳摩尔比为0.5/0.5/1.0,CTA的最佳反应时间为25 min,且CTAIIR的相对分子质量基本没有变化,CTAIIR混炼胶的硫化速率大于IIR混炼胶。The citral （CTA） modified butyl rub-ber （IIR） （CTAIIR） was prepared in. a Haake torque rheometer with the modification system of NaH/CTA, and the structure of CTAIIR was charac-terized by Fourier transform infrared spectroscopy, ^1H-nuclear magnetic resonance and gel permeation chromatography. The modification mechanism was discussed, and the vulcanization characteristics of CTAIIR were studied. The results showed that two double bonds and one hydroxy polar group of CTA were successfully introduced into the molecular chains of IIR. Reaction efficiency of CTA was im-proved through controlling amount of Nail and pro-longing reaction time of CTA. The best mole ratio of NaH/CTA/C ℃ was 0. 5/0. 5/1. 0, and the best reaction time was 25 min. Relative molecular mass of CTAIIR had little change . The vulcanization rate of CTAIIR compound was faster than that of IIR compound.

关 键 词：氢化钠 柠檬酸 改性 丁基橡胶 本体反应 反应效率 硫化特性 

分 类 号：TQ333.6[化学工程—橡胶工业]