COMPATIBILITY, MORPHOLOGY, MECHANICAL PROPERTIES AND BIODEGRADABILITY OF POLY (STYRENE-ETHYLENE-PROPYLENESTYRENE) /MODIFIED THERMOPLASTIC STARCH BLENDS

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RAHIMI BANDARABADI SAAID; EHSANI NAMIN PARVIN; GHASEMI ISMAIL; AZIZI HAMED; KARABI MOHAMMAD

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Journal: Iranian Journal of Polymer Science and Technology Year:2016 | Volume:29 | Issue:4 Page(s): 311-321

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Title

COMPATIBILITY, MORPHOLOGY, MECHANICAL PROPERTIES AND BIODEGRADABILITY OF POLY (STYRENE-ETHYLENE-PROPYLENESTYRENE) /MODIFIED THERMOPLASTIC STARCH BLENDS

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Keywords

MODIFIED STARCHQ1

SEPS/STARCH BLENDQ1

BIODEGRADABILITYQ3

COMPATIBILITYQ2

MORPHOLOGYQ2

Abstract

The effect of MODIFIED STARCH on the properties of poly (styrene-ethylene- propylene-styrene) tri-block copolymer was studied. Chemical treatment of starch with maleic anhydride was accomplished in an internal mixer in the presence of glycerol. The reaction was confirmed using Fourier infrared spectroscopy (FTIR) and titration. The blend samples containing 10, 20, 30 and 50 wt% were obtained by melt blending and their mechanical, morphological and dynamic-mechanical properties were studied. Scanning electron microscopy (SEM) images displayed droplet-matrix MORPHOLOGY and with increases in MODIFIED STARCH up to 50 wt% some partial co-continuous MORPHOLOGY was also observed. With increase of MODIFIED STARCH in the compound, the size of dispersed phase increased. DMTA results revealed that the partial COMPATIBILITY was obtained because of slight difference between glass transition temperatures of two phases in the presence of MODIFIED STARCH. The peak of MODIFIED STARCH shifted to higher values and the differences between the two peaks decreased, indicating partial COMPATIBILITY. Mechanical properties including tensile, elongation-at-break and modulus were also determined and the results showed that the mechanical properties of the sample were higher than those of neat TPS because of the higher COMPATIBILITY. Tensile strength was decreased with increase in MODIFIED STARCH content due to the absence of strong interfacial adhesion. Moduli of the samples were increased with increase in MODIFIED STARCH content due to higher stiffness of starch. BIODEGRADABILITY of the samples was evaluated by weight loss percentage using compost test. A rapid degradation was observed in the first 45 days and with increase of the MODIFIED STARCH content the degree of degradation was increased.

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APA: Copy

RAHIMI BANDARABADI, SAAID, EHSANI NAMIN, PARVIN, GHASEMI, ISMAIL, AZIZI, HAMED, & KARABI, MOHAMMAD. (2016). COMPATIBILITY, MORPHOLOGY, MECHANICAL PROPERTIES AND BIODEGRADABILITY OF POLY (STYRENE-ETHYLENE-PROPYLENESTYRENE) /MODIFIED THERMOPLASTIC STARCH BLENDS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 29(4), 311-321. SID. https://sid.ir/paper/6579/en

Vancouver: Copy

RAHIMI BANDARABADI SAAID, EHSANI NAMIN PARVIN, GHASEMI ISMAIL, AZIZI HAMED, KARABI MOHAMMAD. COMPATIBILITY, MORPHOLOGY, MECHANICAL PROPERTIES AND BIODEGRADABILITY OF POLY (STYRENE-ETHYLENE-PROPYLENESTYRENE) /MODIFIED THERMOPLASTIC STARCH BLENDS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2016;29(4):311-321. Available from: https://sid.ir/paper/6579/en

IEEE: Copy

SAAID RAHIMI BANDARABADI, PARVIN EHSANI NAMIN, ISMAIL GHASEMI, HAMED AZIZI, and MOHAMMAD KARABI, “COMPATIBILITY, MORPHOLOGY, MECHANICAL PROPERTIES AND BIODEGRADABILITY OF POLY (STYRENE-ETHYLENE-PROPYLENESTYRENE) /MODIFIED THERMOPLASTIC STARCH BLENDS,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 29, no. 4, pp. 311–321, 2016, [Online]. Available: https://sid.ir/paper/6579/en

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