Influence of natural and accelerated weathering on performances of photoselective greenhouse films
作者： Pietro Russo , Domenico Acierno , Luca Marinucci , Antonio Greco , Mariaenrica Frigione
DOI: 10.1002/APP.37914
关键词:
摘要: The research aims to investigate the effects of natural and accelerated weathering on polyethylene-based films. At this regard, monolayer films low density/linear density polyethylene blends, containing commercially available organic pigments an UV absorber benzophenone type, have been considered. samples were weathered field (natural weathering) or using two different artificial procedures: lamp QUV chamber. Conditioned film were, then, analyzed by performing several physical tests taking as-received as a reference. Rheological measurements showed increase in viscosity sample melts consequence photodegradation phenomena, inducing formation double bonds crosslinks. This latter result was also confirmed gel content measurements. UV–visible spectroscopic indicated that both cases transmittance occurred. Tensile stiffness, especially case conditioned lamp, large decrease strain at break, machine transverse directions, for © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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