Anionic polymerization of methyl methacrylate by difunctional lithium amide initiators with trialkylsilyl protection
作者： Takehiro Kitaura , Tatsuki Kitayama
DOI: 10.1038/PJ.2013.29
关键词:
摘要: Dilithium diamides of Me3Si- and i-Pr3Si-protection were examined as difunctional initiators for polymerization methyl methacrylate (MMA) in toluene combination with tributylaluminum. The less sterically demanding Me3Si-derivative underwent 1,2-addition (carbonyl addition) the initial stage to form type B poly(MMA) (PMMA) a minor component (26%). i-Pr3Si-derivative gave A PMMA exclusively 1,3-xylylenediamine unit middle chain. H2/Pd-C-mediated cleavage diamine yielded half molar mass narrow molar-mass distribution.
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