Photooxidation of vulcanized EPDM/montmorillonite nanocomposites

被引：33

作者：

Morlat-Therias, Sandrine

Fanton, Elisabeth

Tomer, Namrata S.

Rana, Sravendra

Singh, R. P.

Gardette, Jean-Luc

机构：

[1] Univ Blaise Pascal, UMR 6505, CNRS, Lab Photochim Mol & Macromol, F-63170 Clermont Ferrand, France

[2] Natl Chem Lab, Polymer Sci & Engn Div, Pune 411008, Maharashtra, India

来源：

POLYMER DEGRADATION AND STABILITY | 2006年 / 91卷 / 12期

关键词：

nanocomposite; photooxidation rate; EPDM; stabilization;

D O I：

10.1016/j.polymdegradstab.2006.08.026

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 photooxidation of a vulcanized ethylene-propylene-diene monomer (EPDM)/montmorillonite nanocomposite as well as EPDM/nanocomposite with stabilizers was studied under accelerated UV-light irradiation (lambda >= 300 nm, 60 degrees C) for different times. The development of functional groups during oxidation was monitored by infrared spectroscopy. Photodegradation of the neat polymer and composites took place and the increases of absorbance in hydroxyl and carbonyl groups with irradiation times and also the decreases of the EPDM unsaturations were measured. The data indicated that the photooxidation products were not changed in the presence of the nanofiller. However, the presence of MMt was observed to dramatically enhance the rate of photooxidation of EPDM with a shortening of the oxidation induction time, leading to a decrease of the durability of the nanocomposites. On the other hand, it was observed that addition of stabilizers, either Tinuvin P or 2-mercaptobenzimidazole, was efficient in inhibiting the degradative effect of MMt. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：3033 / 3039

页数：7

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