Effect of octene content on peroxide crosslinking of ethylene–octene copolymers. Issue 2 (21st June 2012)

• Record Type: Journal Article
• Authors: Svoboda, Petr; Poongavalappil, Sameepa; Theravalappil, Rajesh; Svobodova, Dagmar; Mokrejs, Pavel
• Is Part Of: Polymer international. Volume 62:Issue 2(2013:Feb.)
• Page Start: 184
• Page End: 189
• Publication Date: 2012-06-21
• Subjects: Plastics -- Periodicals; Polymers -- Periodicals; Polymerization -- Periodicals; 547.7
• DOI: 10.1002/pi.4277
• Languages: English
• ISSNs: 0959-8103

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p> <bold>Various ethylene–octene copolymers were crosslinked by dicumyl peroxide. Octene content was 16, 20, 30, 35 and 38 wt% and melt flow index was 1 or 3 g/10 min. The concentration of dicumyl peroxide was 0.3, 0.5 and 0.7 wt%. Crosslinking was analyzed by a rubber process analyzer in the temperature range 150–200 °C. Cross‐linkability was evaluated from the real part modulus <italic>s</italic>'_max<italic>versus</italic> peroxide level plots as the slope of the line. With decreasing octene content and increasing melt flow index the crosslinkability increased. This was confirmed also by tan δ analysis. The network density was measured by the gel content. A higher gel content was found for melt flow index 3 and low octene content. The melting points <italic>T</italic>_m and the crystallinities were evaluated by DSC. © 2012 Society of Chemical Industry</bold> </p> </abstract>