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Titolo:
NEW WATER-SOLUBLE PHOTO-CROSS-LINKABLE POLYMERS BASED ON MODIFIED POLY(VINYL ALCOHOL)
Autore:
MUHLEBACH A; MULLER B; PHARISA C; HOFMANN M; SEIFERLING B; GUERRY D;
Indirizzi:
CIBA SPECIALTY CHEM INC,ADDIT DIV,POB 64 CH-1723 MARLY 1 SWITZERLAND NOVARTIS SA RES MARLY CH-1723 MARLY 1 SWITZERLAND CIBA VIS GMBH D-8754 GROSSOSTHEIM 1 GERMANY
Titolo Testata:
Journal of polymer science. Part A, Polymer chemistry
fascicolo: 16, volume: 35, anno: 1997,
pagine: 3603 - 3611
SICI:
0887-624X(1997)35:16<3603:NWPPBO>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
COPOLYMERS;
Keywords:
PVA; ACRYLIC ACID; METHACRYLIC ACID; 2-VINYL-4,4-DIMETHYL-AZLACTONE; ACRYLAMIDES; GPC; LIGHT SCATTERING; PHOTOCHEMISTRY; CONTACT LENSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
A. Muhlebach et al., "NEW WATER-SOLUBLE PHOTO-CROSS-LINKABLE POLYMERS BASED ON MODIFIED POLY(VINYL ALCOHOL)", Journal of polymer science. Part A, Polymer chemistry, 35(16), 1997, pp. 3603-3611

Abstract

Poly(vinyl alcohol) (PVA) was partially modified by polymer analogousreaction with acrylic and methacrylic acid and with 2-vinyl-4,4-dimethyl-azlactone to obtain water-soluble polymers with pendant (meth)acrylate and acrylamide groups. Aqueous solutions of these polymers were crosslinked by UV-irradiation within seconds to form transparent networks with potential for use in contact lenses. The water content of these hydrogels was studied as a function of polymer molecular weight, theacetate, (meth)acrylate, and methacrylamide contents and irradiation conditions. The hydrogels showed good mechanical properties, even at low crosslinker (<5 mol %) and high water contents (60-80%). The formation kinetics and stability of aggregates, investigated by combined GPC/light-scattering measurements of samples annealed and/or stored at different temperatures (-20 to 100 degrees C), give insight into PVA secondary structures. (C) 1997 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 16:22:32