Synthesis of block copolymers with poly(methyl methacrylate) : P(B-b-MMA), P(EB-b-MMA), P(S-b-B-b-MMA) and P(S-b-EB-b-MMA)
作者： Clemens Auschra , Reimund Stadler
DOI: 10.1007/BF00343058
关键词:
摘要: Well-defined diblock copolymers poly(butadiene-b-methyl methacrylate) (=P(B-b-MMA)) and triblock poly(styrene-b-butadiene-b-methyl (=P(S-b-B-b-MMA)) have been prepared by sequential anionic polymerization in THF. The synthesis of P(B-b-MMA) P(S-b-B-b-MMA) was most efficient the presence lithium alkoxides. By this method side reactions are suppressed can be performed at higher temperatures. resulting narrow molecular weight distribution. 1,2-PB midblock quantitatively hydrogenated with tosylhydrazide to enhance thermal stability. Alternatively hydrogenation elevated pressure using hydrogen Wilkinson-catalyst butanone. Heterogeneous catalyst systems based on Palladium did not yield quantitative hydrogenation.
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