Polyalkylation of primary polyols by 1,4-addition to tert-butyl acrylate and acrylonitrile
作者:Agnès Dupraz、Philippe Guy、Claude Dupuy
DOI:10.1016/0040-4039(96)00008-1
日期:1996.2
The very hydrophilic primary polyols pentaerythritol (PE), 1,1,1-tris(hydroxymethyl)ethane and tris(hydroxymethyl)aminomethane (TRIS), can be polyetherified in satisfactory yield by 1,4-addition to tert-butyl acrylate using phase-transfer catalysis. Polycyanoethylation of these polyols can also be accomplished with acrylonitrile. Preliminary results of chelation between some polyether-acids with samarium
H2N-hbPG was then selectively grafted to a linear reactive esterpolymer backbone, poly(pentafluorophenol methacrylate) (PPFPMA), to obtain linear polymers with highly branched side chains of high molecular weights (Mn > 126 kg mol–1) and low polydispersities (Mw/Mn = 1.1–1.3), as shown by SEC. Successful attachment of the hyperbranchedpolyether structure to the linear backbone was confirmed by 19F NMR
报道了具有恰好一个焦点氨基官能团(H 2 N- hb PG)的超支化聚甘油树枝状类似物的合成及其在接枝方法中用于合成线性超支化接枝共聚物的用途。通过使用N,N-二苄基三(羟甲基)氨基甲烷作为缩水甘油的开环多支化聚合的新型引发剂,树枝状类似物具有一个焦点氨基官能团,分子量范围为500至15000 g mol –1,窄至中等多分散度(M w / M n经NMR和SEC确认,合成了= 1.2–1.9)。除去苄基保护基团后,NMR和MALDI-ToF MS证明了局域氨基的可及性和选择性转化。然后将H 2 N- hb PG选择性接枝到线性反应性酯聚合物主链聚甲基丙烯酸五氟苯酚(PPFPMA),以获得具有高分子量(M n > 126 kg mol –1)的高度支化侧链的线性聚合物。和低多分散性(M w / M n = 1.1–1.3),如SEC所示。19证实了超支化聚醚结构与线性骨架的成功连接F NM