Mater Sci Eng C Mater Biol Appl. 2012 Aug 1;32(6):1699-703. doi: 10.1016/j.msec.2012.04.019. Epub 2012 Apr 21.
Yb-based catalyst was used for the first time for atom transfer radical polymerization using activators generated by electron transfer (AGET ATRP) of acrylonitrile (AN) with 2-bromopropionitrile (BPN) as initiator, 2, 2'-bipyridine (bipy) as ligand, and tisn(II) bis(2-ethylhexanoate) (Sn(EH)2) as reducing agent in the presence of air. With respect to AGET ATRP of AN catalyzed by CuBr2, an evident increase of polymer tacticity was observed for AGET ATRP of AN. The increase of syndiotacticity became more and more pronounced than the increase of isotacticity of polyacrylonitrile (PAN) along with YbBr3 content. The block copolymer PAN-b-PMMA with molecular weight at 60,000 and polydispersity at 1.36 was successfully prepared.
首次使用 Yb 基催化剂，通过 2-溴丙腈（BPN）引发的丙烯腈（AN）原子转移自由基聚合（AGET ATRP），以 2,2'-联吡啶（bipy）为配体，三异丁基锡(II)双（2-乙基己酸）酯（Sn（EH）2）为还原剂，在空气中进行反应。与 CuBr2 催化的 AN 的 AGET ATRP 相比，AGET ATRP 的聚合物立构规整性明显增加。随着 YbBr3 含量的增加，聚丙烯腈（PAN）的间同立构规整度的增加比全同立构规整度的增加更为显著。成功制备了分子量为 60000，分散度为 1.36 的 PAN-b-PMMA 嵌段共聚物。
