Cure characteristic and mechanical properties of epoxidized natural rubber/chloroprene (ENR/CR) blends

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Author list: Thongpin C., Niltui P., Sornwaneenawakhun P., Maneeprom T., Malithong S., Wimolmala E.

Publisher: Trans Tech Publications

Publication year: 2010

Volume number: 93-94

Start page: 631

End page: 634

Number of pages: 4

ISBN: 0878492852; 9780878492855

ISSN: 1022-6680

eISSN: 1662-8985

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-75649107820&doi=10.4028%2fwww.scientific.net%2fAMR.93-94.631&partnerID=40&md5=e9abba8a3ada60c5eb0cc674cdc357e3

Languages: English-Great Britain (EN-GB)

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Abstract

Epoxidized Natural rubber (ENR) with the epoxide content of 40 % was prepared and blended with various contents of chloroprene rubber (CR) and 50 phr of carbon black. The cure characteristic, mechanical properties and the effect of gasohol E-85 on the mechanical properties of the rubber vulcanizate were studied. It was revealed from cure characteristic results, tested by Moving Die Rheometer (MDR), that minimum torque of the rubber compounds increased with the content of CR whereas maximum torque tended to increase at the content of 10 phr and decrease after this content, of which the values agreed well with the modulus at 100% elongation in rubber vulcanizates. Considering characteristic scorch and cure time, the values increased with the CR contents. It was clear from the result that at the ENR:CR ratio of 90:10, modulus of 100% elongation and tear strength exhibited the highest values. It was also found that the mechanical properties of the blend vulcanizates were slightly suffered by gasohol E85 except for tear strength. It was understood that this must be because of the effect of the phase continuity and crosslinking that occurred differently in two phases. The phase morphology of the blends were also investigated and reported in the research. ฉ (2010) Trans Tech Publications.

Keywords

Cure characteristic properties, ENR/CR, Epoxidized natural rubber blend