In:
Die Makromolekulare Chemie, Wiley, Vol. 55, No. 1 ( 1962-01), p. 96-120
Kurzfassung:
The homologous p ‐vinylphenylpolysiloxanes of the general formula I (R = CH 3 ) magnified image were synthesized by reaction of p ‐vinylphenylmagnesium chloride with trimethylchlorosilane or the homologous 1‐chloropolysiloxanes in yields of approximately 50%. p ‐Vinylphenylmagnesium chloride and an excess of dimethyldichlorosilane gave p ‐vinylphenyldimethylchlorosilane (formula I, R = Cl, n = 0) in a yield of 70%. The product hydrolyzed quantitatively to the corresponding p ‐vinylphenyldimethylsilanol. By reaction of the latter silanol with an excess of the homologous ω,ω′‐dichloropolysiloxanes or dimethyldichlorosilane, ω‐ p ‐vinylphenyl‐ω′‐chloropolysiloxanes (formula I, R = Cl, n = 1–4) were formed in yields of ca. 50%. By hydrolysis of these compounds the ω,ω′‐di‐ p ‐vinylphenylpolysiloxanes (formula I, R = CH 2 CHC 6 H 4 , n = 1, 3, 5, 7, 9) could be prepared. Polysiloxanes of higher molecular weight and two p ‐vinylphenyl end groups (formula I, R = CH 2 CHC 6 H 4 , n = 20–50) could be synthesized by cohydrolysis of p ‐vinylphenyldimethylchlorosilane or the homologous siloxanes with dimethyldichlorosilane as well as by equilibration of the ω,ω′‐di‐ p ‐vinylphenylpolysiloxanes with cyclic polysiloxanes. The copolymerization parameters of the p ‐vinylphenylpolysiloxanes (formula I, R = CH 3 n = 1–4) with styrene were determined to be r 1 ∼ r 2 ∼ 1 independent of the number of siloxane groups. The SiCl (formula I, R = Cl) and SiOH groups (formula I, R = OH) containing p ‐vinyl‐phenylpolysiloxanes homo‐ and copolymerize very readily. They form high polymers with SiCl and SiOH groups which were used for crosslinking reactions. The di‐ p ‐vinylphenylpolysiloxanes (formula I, R = CH 2 CHC 6 H 4 ) also homo‐ and copolymerize very readily and according to molar ratio and rate of polymerization they form either grafted or crosslinked polymers. These silicon organic styrene derivatives permit in this way the introduction of a relatively high amount of siloxane groups into various macromolecules.
Materialart:
Online-Ressource
ISSN:
0025-116X
,
0025-116X
DOI:
10.1002/macp.02.v55:1
DOI:
10.1002/macp.1962.020550108
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
1962
ZDB Id:
1475026-0
