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Titolo:
Photo-crosslinking of polystyrenes having pendant epoxy groups
Autore:
Oyama, T; Yamashita, T; Suzuki, T; Ebitani, K; Hoshino, M; Iijima, T; Tomoi, M;
Indirizzi:
Yokohama Natl Univ, Fac Engn, Dept Chem & Biotechnol, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan Yokohama Natl Univ Yokohama Kanagawa Japan 2408501 anagawa 2408501, Japan
Titolo Testata:
REACTIVE & FUNCTIONAL POLYMERS
fascicolo: 2, volume: 49, anno: 2001,
pagine: 99 - 116
SICI:
1381-5148(200109)49:2<99:POPHPE>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOINITIATED CATIONIC POLYMERIZATION; REGIOSELECTIVE HYDROSILATIONS; MONOMERS; CATALYSTS;
Keywords:
photo-crosslinking; polystyrene with pendant epoxy group; photo-acid generator; ether linkage; silicon linkages; cyclohexene oxide;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Oyama, T Yokohama Natl Univ, Fac Engn, Dept Chem & Biotechnol, Hodogaya Ku, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan Yokohama Natl Univ 79-5Tokiwadai Yokohama Kanagawa Japan 2408501
Citazione:
T. Oyama et al., "Photo-crosslinking of polystyrenes having pendant epoxy groups", REACT FUNCT, 49(2), 2001, pp. 99-116

Abstract

Vinylbenzyl glycidyl ether (VBGE), vinylbenzyl 2-methylglycidyl ether (VBMGE), vinylphenethyloxirane (VPO), 2-methyl-2-vinylphenethyloxirane (MVPO) and vinylbenzyl 3,4-epoxycyclohexylmethyl ether (VBECE) were prepared as styrene-type monomers having various pendant epoxides and polymerized by the use of AIBN to afford the corresponding polymers and copolymers with styrene(St). Poly[[2 -(3,4-epoxycyclohexyl)ethyl]dimethyl-4-vinylbenzylsilane](poly-(MVBS)) and poly(EMVBS-co-St) having silicon atoms in pendant groups were synthesized by the hydrosilation of poly(dimethyl-4-vinylbenzylsilane) (poly(MVBS)) and poly(MVBS-co-St), respectively, with 4-vinyl-1-cyclohexene 1,2-poxide in the presence of catalytic amount of RhCl(PPh3)(3). Poly [[4-oxa-5-(3,-epoxycyclohexyl)pentyl]dimethyl-4-vinylbenzylsilane-co--styrene] (poly(OEMVBS-co-St)) containing ether linkage between silicon and epoxy groupwas also prepared by the hydrosilation of poly(MVBS-co-St) with allyl 3,4-epoxycyclohexylmethyl ether. The obtained polymers were casted with photo-acid generator, irradiated by UV light and the degree of insolubilization ofthe resulting films was examined. Polymers having cyclohexene oxide unit connected to aromatic ring by -SiCH2CH2-linkage (poly(EMVBS) and poly(EMVBS-co-St)) showed highest crosslinking reactivity, while poly(VBECE) and poly(VBECE-co-St) containing cyclohexene oxide unit and ether linkage in pendantgroup showed lowest. Polymers having 2-methylglycidyl structure at pendantgroup had higher crosslinking reactivity than those containing the corresponding glycidyl structure. Ether linkage between epoxy group and aromatic ring lowered the reactivity of the epoxide compared to the polymers without such linkage. (C) 2001 Elsevier Science BY All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 03:28:51