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Hyperbranched polycarbosilane macromonomers bearing oxazoline functionalities
Author(s) -
Lach Christian,
Müller Philipp,
Frey Holger,
Mülhaupt Rolf
Publication year - 1997
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1997.030180306
Subject(s) - hydrosilylation , oxazoline , branching (polymer chemistry) , degree of polymerization , macromonomer , polymer chemistry , materials science , polymer , polymerization , polymer science , chemistry , organic chemistry , composite material , catalysis
Synthesis of hyperbranched polycarbosilanes by hydrosilylation of triallylsilane is reported. Soluble high molecular weight polymer was obtained in an uncontrolled bulk reaction. Addition of 2‐(10‐decen‐1‐yl)‐1,3‐oxazoline (i) afforded control over degree of polymerization (DP) and (ii) resulted in hyperbranched macromonomers. 17000 ≥ M w ≥ 800 (GPC (PS)) was obtained. 29 Si NMR spectroscopy allowed identification of dendritic, branched, linear, and terminal silicon branch‐points. A modified definition for the degree of branching yielded a value of 0.48 ± 0.05 (theory: 0.44).