Degradation studies on plasticized PVC films submited to gamma radiation

Materials Research

Glória Maria Vinhas²  Rosa Maria Souto-maior²  Camila Maria Lapa¹  Yêda Medeiros Bastos De Almeida¹ 

[1] ,UFPE Departamento de Química Fundamental Recife PE ,Brazil

关键词: PVC;    gamma radiation;    degradation;    plasticizer;    DEHP;   

DOI  :  10.1590/S1516-14392003000400012

来源: SciELO

【 摘 要 】

Poly (vinyl chloride), PVC, is a rigid polymer and for several of its applications must be compounded with plasticizing agents. The plasticizers minimize the dipolar interactions, which exist between the polymer's chains, promoting their mobility. In this work we studied the properties of PVC/plasticizer systems submitted to different doses of gamma radiation. We have used four commercial plasticizers amongt them di(2-ethylhexyl) phthalate, DEHP, which is present in a great number of commercial applications. The PVC/plasticizer systems have been studied as films made by the solvent evaporation technique. Irradiated and non-irradiated films have been characterized by viscosimetric analysis, mechanical essays and infrared spectroscopy. The results have shown that the rigid, non plasticized, PVC film presented the greatest degradation index, while among the plasticized films the one which presented the larger degradation index due to chain scission was the DEHP plasticized PVC.

【 授权许可】

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