Convenient Synthesis of PtBA-g-PMA Well-Defined Graft Copolymer with Tunable Grafting Density
Convenient Synthesis of PtBA-g-PMA Well-Defined Graft Copolymer with Tunable Grafting Density
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便捷合成接枝密度可调的明确接枝共聚物 PtBA-g-PMA
DOI：
10.1021/ma901030j
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发表时间：
2010-01
期刊：
影响因子：
5.5
通讯作者：
Zhang, Yaqin
中科院分区：
文献类型：
--
作者：
Shen, Zhong;Feng, Chun;Hu, Jianhua;Yang, Dong;Lu, Guolin;Huang, Xiaoyu;Zhang, Yaqin
采用可逆加成断裂链转移聚合(RAFT)和原子转移自由基聚合(ATRP)相结合的方法，合成了一系列由聚丙烯酸叔丁酯主链和聚丙烯酸甲酯侧链组成的接枝共聚物。首次合成了一种含ATRP引发基的新型丙烯酸酯单体--2-((2-溴丙酰氧基)甲基)丙烯酸叔丁酯，该单体可通过RAFT方法与丙烯酸叔丁酯进行均聚或共聚反应，得到规整的均聚物和窄分子量分布的共聚物(Mw/mN<；1.18)。竞聚率分别用Fineman-Ross法和Kelen-Tudos法测定。ATRP引发基团的密度可以通过共聚单体的投料比来调节。这些聚合物直接引发丙烯酸甲酯的ATRP反应，合成了接枝密度可控的聚丙烯酸叔丁酯-g-聚丙烯酸甲酯接枝共聚物(MW/Mn<；1.28)，不需要任何聚合物官能团的转化。最后，在不影响聚丙烯酸甲酯侧链的情况下，将聚丙烯酸叔丁酯主链在酸性条件下选择性水解，得到聚丙烯酸接枝聚丙烯酸甲酯两亲性接枝共聚物。
A series of well-defined graft copolymers, consisting of poly(tert-butyl acrylate) backbone and poly(methyl acrylate) side chains, were synthesized by the combination of reversible addition-fragmen- tation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP). A new acrylate monomer containing ATRP initiation group,tert-butyl 2-((2-bromopropanoyloxy)methyl)acrylate, was first prepared, which can be homopolymerized or copolymerized with tert-butyl acrylate by RAFT in a controlled way to obtain well-defined homopolymers and copolymers with narrow molecular weight distributions (Mw/Mn< 1.18). The reactivity ratios were determined by Fineman-Ross and Kelen-Tudos methods, respectively. The density of ATRP initiating groups can be tuned by the feed ratio of the comonomers. These polymers directly initiated ATRP of methyl acrylate to synthesize well-defined poly- (tert-butyl acrylate)-g-poly(methyl acrylate) graft copolymers (Mw/Mn< 1.28) with controllable grafting densities via the grafting-from strategy without any polymeric functional group transformation. Finally, the poly(tert-butyl acrylate) backbone was selectively hydrolyzed in acidic environment without affecting the poly(methyl acrylate) side chains to give poly(acrylic acid)-g-poly(methyl acrylate) amphiphilic graft copolymers.
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影响因子：
4.6
作者：
J. Ruehl;Aaron Nilsen;S. Born;P. Thoniyot;Li-Ping Xu;Shaowei Chen;R. Braslau
通讯作者：
J. Ruehl;Aaron Nilsen;S. Born;P. Thoniyot;Li-Ping Xu;Shaowei Chen;R. Braslau
DOI：
10.1002/chin.200147279
发表时间：
2001-11
期刊：
ChemInform
影响因子：
--
作者：
Krzysztof Matyjaszewski;J. Xia
通讯作者：
Krzysztof Matyjaszewski;J. Xia
影响因子：
19
作者：
Mingfu Zhang;C. Estournès;W. Bietsch;Axel H. E. Müller
通讯作者：
Mingfu Zhang;C. Estournès;W. Bietsch;Axel H. E. Müller
影响因子：
2.5
作者：
Zhong Shen;Yu Chen;Yu Chen;E. Barriau;H. Frey
通讯作者：
Zhong Shen;Yu Chen;Yu Chen;E. Barriau;H. Frey
影响因子：
5.5
作者：
Cai, YL;Tang, YQ;Armes, SP
通讯作者：
Armes, SP