Effect of γ-Dose rate on Biodegradation of γ-Sterilized Biomedical Polyolefins

被引：0
作者：
Alariqi, Sameh A. S. [1 ]
Singh, R. P. [2 ]
机构：
[1] Univ Taiz, Fac Sci Appl, Dept Chem, Taizi, Yemen
[2] Natl Chem Lab, Div Polymer Sci & Engn, Pune 411008, Maharashtra, India
来源：
JOURNAL OF POLYMERS AND THE ENVIRONMENT | 2010年 / 18卷 / 04期
关键词：
Polyolefins; Sterilization; gamma-Dose rate; Biodegradation; Composting and fungal culture; DEGRADATION; OXIDATION; RADIATION;
D O I：
10.1007/s10924-010-0217-9
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The aim of the present study is to study the effect of gamma-dose rate on the biodegradation of gamma-sterilized polyolefins. Films of isotactic polypropylene, high density polyethylene and ethylene-propylene (EP) copolymer were sterilized under gamma-radiation with doses of 10 and 25 kGy. Two different Co-60 sources were used with dose rate 600 and 780 Gy h(-1). Neat and sterilized samples were incubated in compost and fungal culture environments. The changes in functional groups, surface morphology and intrinsic viscosity in polymer chains were characterized by FT-IR spectroscopy, SEM and viscometric measurements, respectively. It was observed that both gamma-degradation and biodegradation processes depend on the dose rate of gamma-source. It was found that the biodegradation of gamma-sterilized polyolefins in composting and microbial culture environments increased with decreasing the gamma-dose rate.
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收藏
页码：600 / 607
页数：8
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