Properties of Thermoplastic Elastomer Based on PP/EPDM/ENR25 and PP/EPDM/NR Blends
DOI:
https://doi.org/10.11113/jt.v39.432Abstract
Kesan penggantian separa etilen propilen dien terpolimer (EPDM) dengan getah asli (NR) dan getah asli terepoksi (ENR25) terhadap sifat pemprosesan, regangan, rintangan minyak dan sifat-sifat morfologi bagi adunan PP/EPDM/NR dan PP/EPDM/ENR25 telah dikaji. Adunan tersebut telah disediakan dengan menggunakan pencampur dalaman pada suhu 100°C dan kelajuan rotor 50 rpm diikuti dengan pengacuanan mampatan. Didapati bahawa adunan PP/EPDM/ENR25 adalah agak mudah untuk diproses berbanding dengan adunan PP/EPDM/NR. Nilai tork adunan juga meningkat dengan penambahan NR dan ENR25. Kekuatan regangan dan pemanjangan pada takat putus menurun dengan penambahan NR dan ENR25 dalam adunan. Adunan PP/EPDM/NR menunjukkan kekuatan regangan dan pemanjangan pada takat putus yang lebih tinggi berbanding dengan PP/EPDM/ENR25 pada komposisi adunan yang sama. Walau bagaimanapun, adunan PP/EPDM/ENR25 menunjukkan rintangan minyak yang lebih tinggi berbanding dengan adunan PP/EPDM/NR. Daripada kajian morfologi didapati adunan PP/EPDM/NR mempamerkan fasa yang lebih homogen berbanding adunan PP/EPDM/ENR25. Key Words: Thermoplastic elastomer; polypropylene; ethylene-propylene diene terpolymer; epoxidized natural rubber; blend The effects of partially substitutions of ethylene-propylene diene terpolymer (EPDM) with natural rubber (NR) and epoxidized natural rubber (ENR25) on the processability, tensile properties, oil resistance and morphologycal studies of PP/EPDM/NR and PP/EPDM/ENR25 blends were investigated. The blends were prepared in a laboratory internal mixer at 180°C and a rotor speed of 50 rpm followed by compression molding. The results indicated that PP/EPDM/ENR25 blend was slightly easier to process than PP/EPDM/NR blends and the torque values increased as the NR and ENR25 contents increased. Tensile strength and elongation at break decreased as NR and ENR25 content in the blends increased. PP/EPDM/NR blends showed higher tensile strength and elongation at break than PP/EPDM/ENR25 blends in all blends composition. However PP/EPDM/ENR25 blends exhibited better oil resistance than PP/EPDM/NR blends. From the morphological studies PP/EPDM/NR exhibit more homogeneous phases than PP/EPDM/ENR25 blends. Key words: Thermoplastic elastomer; polypropylene; ethylene-propylene diene terpolymer; epoxidized natural rubber; blendDownloads
Published
2012-01-20
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Science and Engineering
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How to Cite
Properties of Thermoplastic Elastomer Based on PP/EPDM/ENR25 and PP/EPDM/NR Blends. (2012). Jurnal Teknologi (Sciences & Engineering), 39(1), 97–106. https://doi.org/10.11113/jt.v39.432