TY - JOUR
T1 - Synthesis and characterization of hyperbranched polycarbosilazane
AU - Zhang, Guobin
AU - Fan, Xiaodong
AU - Kong, Jie
AU - Wang, Shengjie
AU - Liu, Yuyang
AU - Si, Qingfa
PY - 2006/2
Y1 - 2006/2
N2 - In order to enhance the reactivity of the silyl-containing ceramic precursor, a hyperbranched silyl-containing polymer with low viscosity and plenty of terminal vinyl-groups was prepared. A novel AB4 type monomer, bis(N, N-diallylamino)methylsilane, was synthesized first by aminolysis of MeHSiCl2 and then was polymerized via hydrosilylation reaction using H2PtCl6 as the catalyst. The polymerization process was monitored by FT-IR spectroscopy. The polymer product was purified via precipitation using ethyl ether and acetonitrile and was analysed by using 1H-NMR, 29Si-NMR and FT-IR spectroscopy. The results indicated that the polymer was hyperbranched polycarbosilazane, and α-hydrosilylation was the main reaction. The degree of branching (DB) of the hyperbranched polymer was 0.56 calculated from the Si-NMR spectrum, and the average molecular weight (Mw) was 13 580 g/mol determined by light scattering method. It was found that there still existed a lot of functional vinyl end groups, which can be used as promising reaction centers for curing or modification of the polycarbosilazane.
AB - In order to enhance the reactivity of the silyl-containing ceramic precursor, a hyperbranched silyl-containing polymer with low viscosity and plenty of terminal vinyl-groups was prepared. A novel AB4 type monomer, bis(N, N-diallylamino)methylsilane, was synthesized first by aminolysis of MeHSiCl2 and then was polymerized via hydrosilylation reaction using H2PtCl6 as the catalyst. The polymerization process was monitored by FT-IR spectroscopy. The polymer product was purified via precipitation using ethyl ether and acetonitrile and was analysed by using 1H-NMR, 29Si-NMR and FT-IR spectroscopy. The results indicated that the polymer was hyperbranched polycarbosilazane, and α-hydrosilylation was the main reaction. The degree of branching (DB) of the hyperbranched polymer was 0.56 calculated from the Si-NMR spectrum, and the average molecular weight (Mw) was 13 580 g/mol determined by light scattering method. It was found that there still existed a lot of functional vinyl end groups, which can be used as promising reaction centers for curing or modification of the polycarbosilazane.
KW - Hydrosilylation reaction
KW - Hyperbranched polycarbosilazane
UR - http://www.scopus.com/inward/record.url?scp=33646546364&partnerID=8YFLogxK
U2 - 10.3724/SP.J.1105.2006.00173
DO - 10.3724/SP.J.1105.2006.00173
M3 - 文章
AN - SCOPUS:33646546364
SN - 1000-3304
SP - 173
EP - 176
JO - Acta Polymerica Sinica
JF - Acta Polymerica Sinica
IS - 1
ER -