首页> 外文期刊>Journal of Applied Polymer Science >Influence of hydrogen grafting of vinylsilane donors on peroxide-initiated melt to poly(ethylene-co-vinyl acetate)
【24h】

Influence of hydrogen grafting of vinylsilane donors on peroxide-initiated melt to poly(ethylene-co-vinyl acetate)

机译:乙烯基硅烷给体的氢接枝对过氧化物引发的熔融物生成聚(乙烯-共-乙酸乙烯酯)的影响

获取原文
获取原文并翻译 | 示例
           

摘要

A technique has been examined for reducing the extent of crosslinking resulting from 1,1-di(t-butylperoxy)-3,3,5-trimethyleyclohexane (L-231) initiating melt grafting of vinyltriethoxysilane (VTEOS) onto poly(ethylene-co-vinyl acetate) (EVA). Using measurements of crosslink density and VTEOS conversion, a standard of selectivity for the EVA/VTEOS/L-231 system at 145 degreesC was defined and used to assess the influence of a range of additives (0.25 mol per mole VTEOS). The data indicated that compounds such as 4-nonene, N,N-dimethylaniline, and cumene improve reaction selectivity, whereas dodecane and cyclohexyl acetate have no effect. A strong correlation between the minimum C-H bond dissociation energy and the influence of a given compound is evident, suggesting that a labile C-H bond is the key element of an effective additive. A mechanism of additive function on the basis of hydrogen atom donation is proposed. (C) 2002 John Wiley Sons, Inc. [References: 11]
机译:已经研究了减少由1,1-二(叔丁基过氧)-3,3,5-三甲基环己烷(L-231)引发乙烯基三乙氧基硅烷(VTEOS)熔融接枝到聚(乙烯-乙-醋酸乙烯酯(EVA)。使用交联密度和VTEOS转化率的测量结果,确定了EVA / VTEOS / L-231系统在145摄氏度下的选择性标准,并用于评估一系列添加剂的影响(每摩尔VTEOS 0.25摩尔)。数据表明,诸如4-壬烯,N,N-二甲基苯胺和枯烯之类的化合物可提高反应选择性,而十二烷和乙酸环己酯则无作用。最小C-H键解离能与给定化合物的影响之间存在很强的相关性,这表明不稳定的C-H键是有效添加剂的关键元素。提出了一种基于氢原子给体的加和作用机理。 (C)2002 John Wiley Sons,Inc. [参考:11]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号