Synthesis and characterization of new polymethacrylates bearing perfluorocyclobutyl and sulfonyl units
Synthesis and characterization of new polymethacrylates bearing perfluorocyclobutyl and sulfonyl units
复制标题
含全氟环丁基和磺酰基单元的新型聚甲基丙烯酸酯的合成与表征
DOI：
10.1016/j.polymer.2009.09.018
复制
发表时间：
2009-10-20
期刊：
影响因子：
4.6
通讯作者：
Huang, Xiaoyu
中科院分区：
文献类型：
--
作者：
Li, Yongjun;Chen, Sheng;Huang, Xiaoyu
合成了一种含全氟环丁基和磺酰基的甲基丙烯酸酯单体，以较好的产率从市售试剂合成了甲基丙烯酸（2-（对-（苯磺酰基）苯氧基）全氟环丁氧基）苯酯，偶氮二（异丁腈）作为引发剂或使用2-溴丙酸甲酯作为引发剂和CuBr/PMDETA作为催化体系的原子转移自由基聚合。用Fineman-Ross法测得BSPPFCBPMA和MMA的竞聚率分别为r（1）= 1.2436和r（2）= 0.8171，用Kelen-Tudos法测得r（1）= 1.2279和r（2）= 0.8023。热重分析表明，含全氟环丁基和磺酰基官能团的聚甲基丙烯酸酯具有优异的热稳定性，其热分解温度随分子量的增加而显著升高。通过自由基共聚得到了BSPPFCBPMA与甲基丙烯酸甲酯的无规共聚物，其热稳定性随BSPPFCBPMA含量的增加而提高。(C)2009爱思唯尔有限公司保留所有权利。
A new methacrylate monomer containing perfluorocyclobutyl and sulfonyl units, p-(2-(p-(benzenesulfonyl)phenoxy)perfluorocyclobutoxy)phenyl methacrylate, was synthesized from commercially available reagents in good yield and this kind of methacrylate can be homopolymerized by free radical polymerization using 2,2'-azobis(isobutyronitrile) as initiator or atom transfer radical polymerization using methyl 2-bromopropionate as initiator and CuBr/PMDETA as catalytic system. The reactivity ratios for BSPPFCBPMA and MMA were found to be r(1) = 1.2436 and r(2) = 0.8171 determined by Fineman-Ross method, and r(1) = 1.2279 and r(2) = 0.8023 by Kelen-Tudos method respectively. The resultant polymethacrylates bearing perfluorocyclobutyl and sulfonyl functionalities exhibit excellent thermal stability as evidenced from thermogravimetric analysis and the decomposition temperature rose dramatically with the increasing of molecular weights. Random copolymers of BSPPFCBPMA and methyl methacrylate were obtained by free radical copolymerization and their thermo-stabilities increase while raising the contents of BSPPFCBPMA. (C) 2009 Elsevier Ltd. All rights reserved.