...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer international >Terpolymerization kinetics of methyl methacrylate or styrene/dodecyl methacrylate/octadecyl methacrylate systems
【24h】

Terpolymerization kinetics of methyl methacrylate or styrene/dodecyl methacrylate/octadecyl methacrylate systems

机译：甲基丙烯酸甲酯或苯乙烯/甲基丙烯酸十二烷基酯/甲基丙烯酸十八烷基酯体系的三元聚合动力学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study describes low-conversion terpolymerization kinetic investigations of methyl methacry-late/dodecyl methacrylate/octadecyl methacrylate (MMA/DDMA/ODMA) and styrene/dodecyl methacrylate/octadecyl methacrylate (ST/DDMA/ODMA) systems.Terpolymerizations were performed isothermally (70-105 deg C),in 1 mol dm~(-3) xylene solutions,using 0.01 mol dm~(-3) of bifunctional peroxide initiator 1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane or monofunctional tert-butylperoxy-2-ethylhexanoate.Synthesized ter-polymers were characterized with respect to composition and molar mass distribution.Initial polymerization reaction rates as well as terpolymer average molar masses decreased with increasing MMA or ST content in the monomer mixture,for both initiators and all investigated temperatures.Overall reaction rates were found to be significantly larger for the MMA/DDMA/ODMA system.In the MMA/DDMA/ODMA system,experimental terpolymer compositions were found to be similar to the initial monomer feed compositions - all the experimental monomer feed mixtures were close to the azeotropic composition.The Alfrey-Goldfinger terpolymerization equation was successfully used for the description of MMA/DDMA/ODMA terpolymerization kinetics,where the existence of the true azeotropic ternary point was established.The same equation did not perform as well for the ST/DDMA/ODMA terpolymerization system.
机译：本研究描述了甲基丙烯酸甲酯/甲基丙烯酸十二烷基酯/甲基丙烯酸十八烷基酯（MMA / DDMA / ODMA）和苯乙烯/甲基丙烯酸十二烷基酯/甲基丙烯酸十八烷基酯（ST / DDMA / ODMA）体系的低转化率三元聚合动力学研究。 -105摄氏度），在1摩尔dm〜（-3）二甲苯溶液中，使用0.01摩尔dm〜（-3）双官能过氧化物引发剂1,1-二（叔丁基过氧）-3,3,5-三甲基环己烷或对两种引发剂，合成的三元共聚物的组成和摩尔质量分布进行了表征。随着单体混合物中MMA或ST含量的增加，起始聚合反应速率以及三元共聚物的平均摩尔质量降低以及发现的所有温度。发现MMA / DDMA / ODMA系统的总反应速率明显更大。在MMA / DDMA / ODMA系统中，实验三元共聚物的组成与初始单体相似进料组成-所有实验单体进料混合物均接近共沸组成.Alfrey-Goldfinger三元聚合方程成功地用于描述MMA / DDMA / ODMA三元聚合动力学，从而确定了真正的共沸三元点的存在。对于ST / DDMA / ODMA三元聚合系统，相同的方程式的效果不佳。

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