Influence of the wood fibre filler on the internal recycling of poly(vinyl chloride)-based composites

被引:43
作者
Augier, Laurent [1 ]
Sperone, Gianluca [1 ]
Vaca-Garcia, Carlos [1 ]
Borredon, Marie-Elisabeth [1 ]
机构
[1] INP ENSIACET, UMR 1010 INRA, Lab Agroind Chem, F-31077 Toulouse, France
关键词
wood polymer composite; poly(vinyl chloride); pine fibres; thermo-mechanical degradation; internal recycling;
D O I
10.1016/j.polymdegradstab.2007.04.010
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 recycling of internal waste of poly(vinyl chloride) (PVC) and wood fibre-reinforced PVC composite was investigated and compared. Twenty extrusion-milling cycles were performed and the mechanical and thermal properties evaluated. This comparison provided evidence of the influence of the vegetable fibres on the thermo-mechanical degradation of the composite material. Up to five cycles, the composite properties remained stable. But after 10 cycles and especially at 20 cycles, the flexural strength increased, whereas the other mechanical properties remained almost constant. At the same time, a decrease of the degradation temperature revealed a deterioration of the molecular structure. The PVC properties remained constant, whereas a great increase in the impact strength was observed after 20 cycles without deterioration of the molecular structure. The different behaviours between the composite and the PVC were explained by the influence of the fibres, which accelerated the PVC degradation, characterized by dehydrochlorination followed by crosslinking reactions. (c) 2007 Elsevier Ltd. All rights reserved.
引用
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页码:1169 / 1176
页数:8
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