Properties and structure of poly(vinyl alcohol)/silica composites

Citation
K. Nakane et al., Properties and structure of poly(vinyl alcohol)/silica composites, J APPL POLY, 74(1), 1999, pp. 133-138
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
0021-8995 → ACNP
Volume
74
Issue
1
Year of publication
1999
Pages
133 - 138
Database
ISI
SICI code
0021-8995(19991003)74:1<133:PASOPA>2.0.ZU;2-5
Abstract
The relationships between the properties and structure are discussed for po ly(vinyl alcohol)(PVA)/silica composites prepared through the sol-gel proce ss. The composites became stiff and brittle with increasing the silica cont ent. The properties of the composites were changed drastically at around th e composition of PVA/silica = 70/30 wt %. For example, there was no large c hange in the Young's modulus above 30 wt % Of silica content (Pure PVA: 31. 8 MPa, silica 30%: 52.6 MPa, silica 50%: 55.2 MPa). Consequently, it was co nsidered that the three-dimensional network structure of silica could be fo rmed in the composite with more than 30 wt % of silica in PVA. From this be havior, it could be considered that the crystal growth of PVA was remarkabl y inhibited by silica network. (C) 1999 John Wiley & Sons, Inc.