Isobutylene-rich macromonomers: Dynamics and yields of peroxide-initiated crosslinking
作者:Jackson M. Dakin、Karthik Vikram Siva Shanmugam、Christopher Twigg、Ralph A. Whitney、J. Scott Parent
DOI:10.1002/pola.27462
日期:2015.1.1
bearing multiple pendant styrenic, acrylic, maleimidic, vinylic, and allylic functional groups have been prepared and examined in the context of peroxide‐initiated crosslinking. Halide displacement from brominated poly(isobutylene‐co‐isoprene) (BIIR) by the requisite carboxylate nucleophiles in homogeneous toluene solutions provide the desired esters in quantitative yield without complications from dehydrohalogenation
制备了带有多个侧基苯乙烯,丙烯酸,马来酰亚胺,乙烯基和烯丙基官能团的富含异丁烯的新型弹性体,并在过氧化物引发的交联中对其进行了研究。从溴化聚(异丁烯-卤化物位移共异戊二烯(BIIR)在均相甲苯溶液中由所需的羧酸酯亲核试剂提供所需的酯,其定量收率无脱氢卤化或过早交联的复杂性。在无溶剂条件下,将生成的大分子单体与过氧化二枯基一起加热至160°C,即可得到热固性衍生物,其反应速率和收率明显取决于官能团的结构。通常,由于通过CC寡聚进行交联和通过β裂解主链大自由基中间体的降解之间的竞争平衡,只有使用高反应性的侧基官能团才能达到较高的固化程度。通过使用带有丙烯酸酯官能团的硝酰自由基捕获剂,可以独立控制交联速率和固化程度。©2014 Wiley Periodicals,Inc. J. Polym。科学,A部分:Polym。化学2015年,53,123-132