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Comparison of rheological behavior of branched polypropylene prepared by chemical modification and electron beam irradiation under air and N2
Authors:S. Abbas Mousavi  Susan Dadbin  Masoud Frounchi  David C. Venerus  Teresita Guadarrama Medina
Affiliation:1. Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;2. Radiation Applications Research School, Nuclear Science and Technology Research Institute, Tehran, Iran;3. Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, Illinois, USA;1. Dept. of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208, USA;2. Dept. of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA;1. School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Pulau Pinang, Malaysia;2. Department of Chemistry, Abdul Wali Khan University Mardan, Mardan 23200, Pakistan;1. State Key Laboratory of New Textile Materials and Advanced Processing Technology, College of Materials Science and Engineering, Wuhan Textile University, Wuhan, 430200, Hubei, PR China;2. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang, 621000, Sichuan, PR China
Abstract:
Chemical and electron beam irradiation methods were used to introduce a branched structure into polypropylene and propylene–ethylene copolymer. The chemical method was carried out in an internal mixer using initiator and TMPTMA monomer. In irradiation method, the polymer was irradiated by electron beam under air and nitrogen atmosphere. The branched structure in the modified polymer was confirmed by rheological measurements. While degradation was significant in chemical method, branching occurred efficiently by irradiation under air. Small amount of ethylene in the propylene copolymer promoted branching over degradation.
Keywords:
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