Effect of environment on the degradation of starch and pro-oxidant blended polyolefins

被引：57
作者：
Muthukumar, Thangavelu [1 ]
Aravinthan, Adithan [1 ]
Mukesh, Doble [1 ]
机构：
[1] Indian Inst Technol, Dept Biotechnol, Madras 600036, Tamil Nadu, India
来源：
POLYMER DEGRADATION AND STABILITY | 2010年 / 95卷 / 10期
关键词：
Photo degradation; Pro-oxidant; Biodegradation; Contact angle; Starch blended; TGA; POLYETHYLENE; BIODEGRADATION; SOIL; POLYPROPYLENE; PHOTOOXIDATION; DEGRADABILITY; MECHANISM; FILMS; LDPE;
D O I：
10.1016/j.polymdegradstab.2010.07.017
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 aim of this study was to understand the rate of degradation of commercial pro-oxidant blended and starch blended High Density Polyethylene (HDPE), pro-oxidant blended Low Density Polyethylene (LDPE), and starch blended polypropylene in three different environments, namely under direct sunlight, buried in soil and immersed in marine waters for a period of 150 days. The bio-fouling parameters were also monitored in the case of polymers deployed in sea water. Exposure to sunlight showed highest weight loss (>10%) and samples buried in soil showed the lowest (similar to 1%). Pro-oxidant blended HDPE showed higher weight loss when compared to starch blended (22.7 as against 11%). Scanning electron microscopy revealed surface deterioration and decrease in contact angle indicated reduction in surface hydrophobicity. Increase in the carbonyl and hydroxyl groups in the infra-red spectrum of the exposed samples suggested abiotic degradation. Starch blended PP exposed to sunlight showed the highest thermo gravimetric weight loss (63.8%) followed by the same polymer buried in soil (46.1%). (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1988 / 1993
页数：6
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