Selectivity in anionic and cationic ring-opening polymerizations of tetramethyl-1-(3?-trifluoromethylphenyl)-1-phenylcyclotrisiloxane and tetramethyl-1-[3?,5?-bis(trifluoromethyl)phenyl]-1-phenylcyclotrisiloxane
作者： Thomas M. Gädda , Allison K. Nelson , William P. Weber
DOI: 10.1002/POLA.20349
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摘要: Anionic and cationic ring-opening polymerizations of two novel cyclotrisiloxanes, tetramethyl-1-(3′-trifluoromethylphenyl)-1-phenylcyclotrisiloxane (I) tetramethyl-1-[3′,5′-bis(trifluoromethyl)phenyl]-1-phenylcyclotrisiloxane (II), are reported. polymerization I or II leads to copolymers with highly regular microstructures. Copolymers obtained by II, initiated triflic acid, have less microstructures characteristic chemoselective processes. The composition microstructure been characterized 1H 29Si-NMR, the molecular weight distributions GPC, thermal properties DSC TGA. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Chem 42: 5235–5243,
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