Influence of nanoclays on the photochemical behaviour of poly(vinyl alcohol)

被引：34
|
作者：
Gaume, Julien [1 ,2 ]
Rivaton, Agnes [1 ,2 ]
Therias, Sandrine [1 ,2 ]
Gardette, Jean-Luc [1 ,2 ]
机构：
[1] Univ Blaise Pascal, Photochim Mol & Macromol Lab, CNRS, UMR 6505, F-63171 Aubiere, France
[2] Univ Blaise Pascal, Clermont Univ, Photochim Mol & Macromol Lab, F-63000 Clermont Ferrand, France
来源：
POLYMER DEGRADATION AND STABILITY | 2012年 / 97卷 / 04期
关键词：
PVA; Nanocomposite; Montmorillonite; Laponite; UV light irradiation; Degradation; POLYMER/CLAY NANOCOMPOSITES; PHOTOOXIDATION; PVA; DEGRADATION; MONTMORILLONITE; HYDROGELS;
D O I：
10.1016/j.polymdegradstab.2012.01.022
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The photochemical behaviour of poly(vinyl alcohol)/clay nanocomposite films with a natural Montmorillonite clay (MMt-Na+) and a synthetic Laponite clay at varying concentrations (up to 10 wt%) was investigated. Nanocomposite films were exposed to UV-visible light irradiation (lambda > 300 nm) in accelerated ageing conditions in both the presence and absence of oxygen. Under photo-oxidation conditions, the same photoproducts of PVA were formed in the presence of both clays, but a discrepancy in the photo-oxidation rate of PVA was observed for the different clays. MMt-Na+ displays a pro-degradant effect that was influenced by the clay content, whereas Laponite has no influence on the oxidation rate of PVA. However, in the absence of oxygen, both PVA/clay nanocomposites proved to be as photostable as PVA. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：488 / 495
页数：8
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