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Degradation and Stabilization of Low-density Polyethylene Films used as Greenhouse Covering Materials

โœ Scribed by P.A. Dilara; D. Briassoulis

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
187 KB
Volume
76
Category
Article
ISSN
0021-8634

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โœฆ Synopsis

A large quantity of plastics is used annually world-wide in the agricultural sector, of which a signi"cant amount is intended for protected cultivation, in greenhouses and low tunnels. For this speci"c application, thin "lms of low-density polyethylene is the most widespread material used. As expected, due to the harsh conditions met during their use, from ultraviolet irradiation, heat, agrochemicals, as well as due to their limited thickness, such "lms degrade in a short time and often unexpectedly, creating both environmental problems and economic di$culties. In this paper, the most important mechanisms of degradation of low-density polyethylene agricultural "lms are described, giving emphasis on the special conditions and degradation parameters met during their use as greenhouse covering material. The methods of stabilizing such "lms, thus extending their service life, are also brie#y discussed.

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