Mechanical behaviour of biodegradable agricultural films under real field conditions

被引:156
作者
Briassoulis, D [1 ]
机构
[1] Agr Univ Athens, Dept Agr Engn, Athens 11855, Greece
关键词
biodegradable materials; agricultural films; degradation of plastic films; mechanical properties;
D O I
10.1016/j.polymdegradstab.2005.09.016
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 mechanical behaviour of various types of biodegradable materials depends on their chemical composition and additives, the processing characteristics and the application conditions. The environmental conditions during storage and usage of these materials strongly influence their mechanical properties and behaviour. Ageing and degradation during the useful lifetime of biodegradable agricultural films causes losses in the mechanical performance of the material, as measured by monitoring the evolution of some of the critical mechanical properties. Such losses may be comparable to the corresponding losses of the conventional polyethylene agricultural films due to ageing, or they may be more drastic. In the present paper, the overall mechanical and ageing/degradation behaviour of experimental specially designed and manufactured low-tunnel and mulching biodegradable films, exposed to full-scale field conditions is analysed. Selected critical mechanical properties of these films manufactured with different grades of Mater-Bi material and additives, different thickness and processing schemes and exposed to real cultivation conditions in four different locations in Europe are investigated in the laboratory and compared against the corresponding behaviour of conventional agricultural films at various stages of their exposure time. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1256 / 1272
页数:17
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