AHMAD AZREM AZMI, NIK NORIMAN ZULKEPLI, MUHAMMAD RAZIF NORDIN, MOHD MUSTAFA AL BAKRI ABDULLAH,ION SANDU, MOHD ARIF ANUAR MOHD SALLEH, ISMAIL HANAFI Effects of Cure Characteristics, Mechanical and Morphological Properties of Styrene Butadiene Rubber/Recycled Chloroprene Rubber (SBR/CRr) Blends

AHMAD AZREM AZMI, NIK NORIMAN ZULKEPLI, MUHAMMAD RAZIF NORDIN, MOHD MUSTAFA AL BAKRI ABDULLAH,ION SANDU, MOHD ARIF ANUAR MOHD SALLEH, ISMAIL HANAFI Effects of Cure Characteristics, Mechanical and Morphological Properties of Styrene Butadiene Rubber/Recycled Chloroprene Rubber (SBR/CRr) Blends

Abstract:
The effects of tensile and morphological properties of styrene butadiene rubber/virgin chloroprene rubber blends (SBR/CRv) and styrene butadiene rubber/recycled chloroprene rubber blends (SBR/CRr) were investigated. The range size of CRr used in this study was 0.3 - 0.7 mm. Both SBR/CRv blends and SBR/CRr blends were prepared using two roll mill at room temperature with blend ratios 95/5, 85/15, 75/25, 65/35 and 50/50. It can be observed that, cure characteristics of SBR/CRr blends have lower cure time, t90 than SBR/CRv blends.SBR/CRr blends showed higher scorch time, t2 and minimum torque (ML) compared to SBR/CRv blends at all blend ratios compared with the SBR/CRv blends. However, maximum torque (MH) of SBR/CRr blends exhibit the opposite trend compared with the SBR/CRv blends. It can be observed that, the tensile strength and elongation at break of SBR/CRr blends show higher value than SBR/CRv blends particularly up to 15 phr of CRr in the blends. However, SBR/CRr blends shows higher value of tensile modulus (M100) than SBR/CRv blends at all blend ratios. The scanning electron microscopy (SEM) of tensile fracture surface of SBR/CRr blends at 50 blend ratios illustrated a better adhesion and dispersion in comparison with SBR/CRv blends. Keywords: chloroprene rubber, recycled chloroprene rubber, styrene butadiene rubber, tensile properties, SEM

Issue: 2013 Volume 50, Issue 3

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