摘要
提出并证明了一种在聚合物链中间指定位置引入特定功能基团的方法。以聚丙烯酸甲酯(PMA)为大分子引发剂,利用原子转移自由基聚合(ATRP)在PMA链端单加成烯丙醇单体,氧化为羧基后利用异戊烯醇保护,使链端重新具有了ATRP的引发活性,再次引发丙烯酸甲酯(MA)的聚合,最后选择性脱除异戊烯醇保护,从而获得在链上指定位置含有羧基的PMA,证明了本方法的可行性。该方法可以进一步扩展,用来合成结合处带有特定官能团的多嵌段共聚物。
Poly （methyl acrylate） （PMA） with bromide functionality at the chain end was synthesized via atom transfer radical polymerization （ATRP） and used as the substrate for mono-addition of allyl alcohol under ATRP condition. The mono-adduct of allyl alcohol on PMA substrate was then oxidized, turning hydroxyl group of allyl alcohol to carboxylic group and regaining ability to initiate ATRP. To avoid potential side reactions, the free carboxylic group was protected with prenyl alcohol ester prior to the synthesis of second block of MA by ATRP. After polymerizing the second block of PMA, the mid-chain carboxylic group was selectively deprotected by trimethylsilyl trifluoromethanesulfonate（TMSOTf）, and PMA with a functional carboxylic group at specific position along the polymer chain was obtained. This method for introduction of specific mid-chain functionalities at predesigned positions on polymer chain was proved feasible and could be expanded to synthesize polymers with multiple functional groups along the chain.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第2期35-37,41,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(21074064)
