摘要
以α-溴代苯乙烷（BEB）为引发剂，CuBr／2，2’-联二吡啶（BPY）为催化体系，对二乙烯苯（DVB）进行原子转移自由基聚合（ATRP）原位生成自引发单体合成超支化聚合物进行了研究。用^1H—NMR、GPC、MALLS分别对聚合反应过程和聚合物进行了表征和分析。结果表明，可以由双烯化合物原位生成自引发单体合成超支化聚合物．聚合物分子质量Mn,GPC在10^4以下，分子质量分布为2～4，表现出较宽的分子质量分布．以光散射法测定的聚合物绝对分子质量Mm,MALLS达10^5以上。
The homopolymerization of divinylbenzene （DVI3） by atom transfer radical polymerization （ATRP）, a ‘living＇/controlled radical polymerizaton, has yielded a hyperbranched polymer. The polymerization wcre carried out in only one step without solvent. So when the inimer was formed in-situ, the growth of the macromolecule was undergoing at the same time. This papcr dctailed the studies on thc kinetics of poly-merization and the growth of macromolecule during the polymcrization. The polymers obtained were analyzed by ^1H-NMR, MALLS and GPC. It is determincd that hyperbranched polymers can be obtained from divinylbenzene. The molecular weight determined by using MALLS is 2 to 6 times of that obtained by GPC, which proves that the polymer obtained is of hyperbranched structure.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2006年第6期83-86,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金(20574032)
中石油科技中青年创新基金(05E7009)
