Photooxidative behaviour of polyethylene/polyamide-6 blends

被引：27
|
作者：
Therias, Sandrine [1 ,2 ]
Dintcheva, Nadka Tzankova [3 ]
Gardette, Jean-Luc [1 ,2 ]
La Mantia, Francesco Paolo [3 ]
机构：
[1] Univ Blaise Pascal, Clermont Univ, Lab Photochim Mol & Macromol, F-63000 Clermont Ferrand, France
[2] CNRS, UMR 6505, LPMM, F-63173 Paris, France
[3] Univ Palermo, Dipartimento Ingn Chim Proc & Mat, I-90128 Palermo, Italy
来源：
POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 04期
关键词：
Photooxidation behaviour; Polymer blends; Mechanical properties; Infrared analysis; LOW-DENSITY POLYETHYLENE; N-ALKYL-AMIDES; LDPE/PA6; BLENDS; AUTOXIDATION; MORPHOLOGY;
D O I：
10.1016/j.polymdegradstab.2009.12.017
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 several polyethylene/polyamide-6 blends was studied under conditions of artificial accelerated weathering. Particular attention was paid to five different compositions ranging from pure polyethylene to pure polyamide with blends of PE/PA-6 of various compositions: 75/25, 50/50 and 25/75 wt/wt%. Analysis by infrared spectroscopy of the chemical modifications caused by photooxidation showed that exposing the polyethylene/polyamide-6 blends to UV-Iight irradiation led to the formation of oxidation photoproducts in both polymer phases. in agreement with both the mechanical and spectroscopic analyses, the photooxidation rate of the blends was observed to be much higher than that of the homopolymers. The results given in this paper suggest that photooxidation of the PE/PA blends starts in the polyamide phase and that the subsequent photooxidation of the polyethylene phase may be initiated by the radicals coming from the oxidation of PA. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：522 / 526
页数：5
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