Iranian Journal of Polymer Science and Technology 10163255 5 1 1992 05 22 Controlled Ultraviolet Photodegradation of LDPE as Thin Film Controlled Ultraviolet Photodegradation of LDPE as Thin Film 113 10.22063/jipst.1992.113 FA Journal Article 1970 01 01 http://jips.ippi.ac.ir/article_113_0d205dad34fd050939bb3efe1f1606b9.pdf