Vinyl acetate content and electron beam irradiation directed alteration of structure, morphology, and associated properties of EVA/EPDM blends. Issue 21 (15th February 2016)

• Record Type: Journal Article
• Authors: Ray Chowdhury, Subhendu; Sharma, Bhuwanesh Kumar; Mahanwar, Prakash; Sarma, Kuppa Sivasankara
• Is Part Of: Journal of applied polymer science. Volume 133:Issue 21(2016)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-02-15
• Subjects: blends -- crosslinking -- flame retardance -- irradiation -- morphology; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.43468
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: A series of ethylene vinyl acetate/ethylene–propylene diene elastomer (EVA/EPDM) blends with four types of EVAs with various vinyl acetate (VA) content, are prepared without and with crosslinker, trimethylol propane triacrylate (TMPTA). These are irradiated by electron beam (EB). As the VA content increases, the gel content, i.e., degree of crosslinking of EVA/EPDM blends, is increased. With increase in VA content, the modulus and tensile strength are decreased but elongation at break is increased due to increase in amorphousness. On EB irradiation, modulus and tensile strengths are increased but at the cost of elongation at break. Crystallinities of all blends are decreased with increase in VA and EB crosslinking. The thermal stability of EVA/EPDM blend is decreased with increase in VA content but increased after EB irradiation. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) show that with increase in VA content the miscibility of two polymers keeps on increasing, which even become more after EB irradiation. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2016, 133, 43468. Abstract :