The observation of PP/EVA blends in which isotactic PP was preradiated with different radiation absorbed doses. Issue 28 (16th March 2017)

• Record Type: Journal Article
• Authors: Zhang, Yicheng; Li, Jianxi; Shen, Liguo; Lin, Hongjun; Shan, Yongdong
• Is Part Of: Journal of applied polymer science. Volume 134:Issue 28(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-03-16
• Subjects: composites -- degradation -- non‐polymeric materials and composites; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.45057
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Isotactic polypropylene (PP) was preradiated by γ ray with different absorbed doses and subsequently blended with ethylene‐vinyl acetate (EVA) co‐polymer to prepare PP/EVA blends. The average molecular weight ( Mn ) of isotactic PP decreased with the increasing radiation absorbed dose, which indicated that high energy radiation of γ ray broke the isotactic long PP chains into shorter ones. The melt flow rate results evidenced that the processing ability of PP/EVA blends was continuously promoted with the increasing absorbed dose. The β crystal was obtained in the PP/EVA blends by the radiation method. The onset temperatures and peaks of crystallization of PP/EVA blends decreased slightly with the increasing radiation absorbed dose, while high energy radiation was inclined to enhance the crystallinity of PP/EVA blends. The Fourier transform infrared spectroscopy (FTIR) tests confirmed an interesting phenomenon that PP tended to move to the surface of the PP/EVA blends with the increasing radiation absorbed dose. Mechanical tests proved that the PP/EVA blends remained a comparative stable mechanical property under the absorbed dose of 30 kGy. The experimental results indicated that PP/EVA blend was a potential candidate for industrial applying. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2017, 134, 45057. Abstract :