Peroxide crosslinking of Ziegler‐Natta thermoplastic polyolefins | Zendy

Bacci Dino | Zendy; Marchini Roberta | Zendy; Scrivani Maria Teresa | Zendy

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Peroxide crosslinking of Ziegler‐Natta thermoplastic polyolefins

Author(s) -

Bacci Dino,

Marchini Roberta,

Scrivani Maria Teresa

Publication year - 2004

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.20012

Subject(s) - compression set , materials science , natta , peroxide , organic peroxide , composite material , thermoplastic , natural rubber , thermoplastic elastomer , catalysis , polymer chemistry , polymer science , polymerization , polymer , organic chemistry , chemistry , copolymer

A range of reactor grade TPO alloys (PP/EPM alloys from Ziegler‐Natta catalysis) were studied in order to evaluate their dynamic cross‐linkability, using a peroxide system. The amount of ethylene content in EPM rubber ranged from 28 to 77 wt%, to investigate the competition between vis‐breaking and cross‐linking during the peroxide reaction. Processing temperature and different peroxide/coagent ratios were the parameters varied in the present work. Cross‐linking degree was evaluated with Compression Set measurements and Dynamic Mechanical Analysis. It was therefore possible to find a correlation between the two analytical techniques. Feasibility of TPV rubbers with Compression Set at about 50% (22 h, 70°C) was demonstrated.

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