In:
Macromolecular Chemistry and Physics, Wiley, Vol. 208, No. 5 ( 2007-03-05), p. 541-548
Abstract:
Three novel hyperbranched polycarbosilazanes were synthesized via hydrosilylation reaction and characterized by FT‐IR, 1 H NMR, 13 C NMR, 29 Si NMR, and laser light scattering. First, one AB 4 type monomer bis( N , N ‐diallylamino)‐methylsilane ( M1 ) and two AB 2 type monomers ( N , N ‐diallylamino)‐dimethylsilane ( M2 ) and N , N ‐bis (dimethylsilyl)‐allylamine ( M3 ) were prepared by aminolysis of MeHSiCl 2 and Me 2 HSiCl with diallylamine and allylamine. Then monomers were polymerized into hyperbranched polycarbosilazanes via hydrosilylation reaction using H 2 PtCl 6 as the catalyst. The measurements indicate that α ‐hydrosilylation mainly occurs during the polymerization and the polymers synthesized consist of SiNC linkages with hyperbranched architectures carrying a large amount of functional vinyl or SiH end groups. The molecular weights ( $\overline M _{\rm w} $ ) of the three polymers were found to be 13 500, 4 600, and 3 900 g · mol −1 , respectively. magnified image
Type of Medium:
Online Resource
ISSN:
1022-1352
,
1521-3935
DOI:
10.1002/macp.200600482
Language:
English
Publisher:
Wiley
Publication Date:
2007
detail.hit.zdb_id:
1475026-0
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