Regioselective Ring-Opening Metathesis Polymerization of 3-Substituted Cyclooctenes with Ether Side Chains.
作者:Shingo Kobayashi、Kousaku Fukuda、Maiko Kataoka、Masaru Tanaka
DOI:10.1021/acs.macromol.6b00273
日期:2016.4.12
Allyl-substituted cyclooctenes with ether side-chains [methoxy, methoxy-terminated oligo(ethylene glycol)s, and tetrahydrofurfuryloxy group] were prepared as monomers and polymerized by ring-opening metathesis polymerization (ROMP) using Grubbs second-generation catalyst. In all cases, the ROMP of allyl-substituted monomers proceeded in a regio- and stereoselective manner to afford polymers with remarkably
将具有醚侧链[甲氧基,甲氧基封端的低聚(乙二醇)和四氢糠基氧基]的烯丙基取代的环辛烯作为单体制备,并通过开环易位聚合(ROMP)使用格鲁布斯第二代催化剂进行聚合。在所有情况下,烯丙基取代的单体的ROMP都以区域和立体选择性的方式进行,以提供具有显着高的头对尾区域规则性和高反式立体规则性的聚合物。聚合物的区域规整度和立体规整度受取代基的体积影响,四氢糠氧基取代的环辛烯的ROMP表现出近乎完美的区域规整度(头对尾= 99%)和立体选择性(反式双键= 99%) 。所得聚合物的化学加氢得到模型聚(乙烯-共-乙烯基醚)与每第八个骨架碳精确地放置醚分支。用差示扫描量热法(DSC)研究热性能,并通过水接触角测量评价聚合物的亲水性。通过改变低聚(乙二醇)基团的侧链长度,有效地调节了不饱和聚合物的表面亲水性,同时保持了饱和版本的疏水特性不变。