期刊
POLYMER DEGRADATION AND STABILITY
卷 96, 期 6, 页码 1125-1133出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2011.02.015
关键词
Plastics waste; Primary recycling; Reprocessing; Polyethylene; Degradation mechanisms; Processing-structure properties; relationships
资金
- PRODEP III Programme [2/5.3/PRODEP/2000, 5.3/C/1065.001/00]
The present work aims at evaluating the behaviour of various grades of high and low density polyethylene subjected to continuous injection moulding operations. It is based on a wide range of experimental techniques that allowed the establishment of relationships between the observed property changes and the structural modifications developed in the polymers. The study confirmed the coexistence of two distinct degradation mechanisms, crosslinking and chain scission, that occur due to thermo-oxidative reactions arising during the different injection moulding stages. The relative importance of these two mechanisms depends on the material structure and on the processing conditions used. It was also possible to confirm that the polyethylenes with lower molecular mass show low sensitivity to degradation during reprocessing. Furthermore, the more branched polymers (as is the case of LDPE) also proved to be less sensitive to thermo-degradation phenomena. Overall, it was concluded that the primary recycling of polyethylene, if performed under well controlled conditions, will lead to only minor material property losses. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据