Characterization Of Epoxidised Natural Rubber Ethylene Propylene Diene Monomer (ENR-EPDM) Blend Prepared Via Solution Mixing In Toluene

Muhammad Zaim, Azamam (2013) Characterization Of Epoxidised Natural Rubber Ethylene Propylene Diene Monomer (ENR-EPDM) Blend Prepared Via Solution Mixing In Toluene. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The objective of this research is to study the miscibility of epoxidized natural rubber (ENR) in elastomer of ethylene propylene diene monomer (EPDM). ENR is a chemical derivative of natural rubber with epoxide groups distributed along the back-bond of natural rubber chains. This characteristic of ENR is believed to contribute to the improvement of adhesion in any blend of NR and EPDM. In this research, mixture of ENR and EPDM were blended together via solution mixing in Toluene as the solvent. The effect of mixing formulation and aging time to the ENR/EPDM blend were studied. The miscibility of ENR in EPDM was determined through physical, thermal, and compositional via density measurement, differential scanning calorimetry (DSC) and Fourier transformation infrared spectroscopy (FTIR). NR/EPDM incorporated with ENR/EPDM as compatibilizer was melt blended by using internal mixer and compatibility analyses in term of mechanical and morphological have been tested via tensile and scanning electron microscopy. Mixing time at 0, 8 and 24 hour with aging time at 14, 7 and 1 day produced ENR/EPDM blend with significant miscibility and properties. ENR/EPDM blend with 8-hours mixing and 7 days aging shows the highest percentage of reacted epoxide which is 89%. This high percentage of reacted epoxide contributes to high degree of miscibility between phases hence resulted in high tensile properties and large plastic deformation before fracture. As the conclusion, ENR/EPDM as compatibility agent shows high potential to increase miscibility and mechanical properties of NR/EPDM blend.

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