Changes in Mixing Torque, Mechanical and Dynamic Rheological Properties of Epoxidized Natural Rubber and Copolyester Blends as Affected by Epoxidized Natural Rubber Contents

Densak Kaewkabpet; Charoen Nakason; Azizon Kaesaman; Anoma Thitithammawong

doi:10.4028/www.scientific.net/AMR.844.69

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 844Changes in Mixing Torque, Mechanical and Dynamic...

Changes in Mixing Torque, Mechanical and Dynamic Rheological Properties of Epoxidized Natural Rubber and Copolyester Blends as Affected by Epoxidized Natural Rubber Contents

Abstract:

Thermoplastic natural rubber (TPNR) based on epoxidized natural rubber with 30 %mol epoxide (ENR-30) and copolyester (COPE) blends was prepared in a molten state by using roller rotor internal mixer. Effect of various ENR contents on mixing torque together with mechanical and dynamic properties of the ENR-30/COPE blends was investigated. It was found that the mixing torque and complex viscosity increased with increasing contents of the ENR in the blends. This was due to higher polarity the ENR molecules caused interaction and entanglement of the ENR molecular chains with higher viscosity. Furthermore, improvement of elastomeric properties of the ENR-30/COPE blends was clearly observed, especially in the blends with higher proportion of the ENR. These improved elastomeric properties with high elongation at break, low tension set and high storage modulus together with low tan δ. This observation correlated to higher elastic component in the blend caused promoting higher elastic response in combination with increasing of interaction between the ENR and the COPE phases.

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Periodical:

Advanced Materials Research (Volume 844)

Pages:

69-72

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.844.69

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Online since:

November 2013

Authors:

Densak Kaewkabpet, Charoen Nakason*, Azizon Kaesaman, Anoma Thitithammawong

Keywords:

Copolyester, Epoxidized Natural Rubber (ENR), Rubber Content, Simple Blend, Thermoplastic Natural Rubber (TPNR)

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