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Oxidative degradations of oxodegradable LDPE enhanced with thermoplastic pea starch: Thermo-mechanical properties, morphology, and UV-ageing studies

机译:热塑性豌豆淀粉增强可氧化降解的LDPE的氧化降解:热机械性能,形态和UV老化研究

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The abiotic UV-degradation behavior of oxodegradable LDPE was investigated in the presence of thermoplastic pea starch (TPPS) in this study. Oxodegradable LDPE was first melt-blended with thermoplastic pea starch (TPPS) using an internal mixing chamber to enhance the abiotic oxidative degradation of oxodegradable LDPE. Because of their different affinity, maleated polyethylene was added as compatibilizer. Tensile properties, thermal properties, and morphology of resulting melt-blends were determined at different content in TPPS. High content in TPPS (40 wt %) could be readily added to oxodegradable LDPE without affecting the tensile properties of resulting melt-blends. UV-ageing studies on compatibilized TPPS/oxodegradable LDPE melt-blends were carried out by Attenuated Total Reflectance infrared spectroscopy (ATR-FTIR), Dynamic Thermomechanical Analyses (DMTA) and Differential Scanning Calorimetry (DSC) under abiotic conditions. These results suggested a synergistic effect on the UV-ageing of TPPS-based melt-blends provided by both components during the first stage of UV-irradiation.
机译:在本研究中,在存在热塑性豌豆淀粉(TPPS)的情况下,研究了可氧化降解的LDPE的非生物UV降解行为。首先使用内部混合室将可氧化降解的LDPE与热塑性豌豆淀粉(TPPS)熔融共混,以增强可氧化降解的LDPE的非生物氧化降解。由于它们的亲和力不同,因此添加了马来化聚乙烯作为增容剂。在TPPS中的不同含量下确定了所得熔体的拉伸性能,热性能和形态。 TPPS中的高含量(40 wt%)可以很容易地添加到可氧化降解的LDPE中,而不会影响所得熔融共混物的拉伸性能。在非生物条件下,通过衰减全反射红外光谱(ATR-FTIR),动态热力学分析(DMTA)和差示扫描量热法(DSC)对相容的TPPS /可氧化降解LDPE熔体进行了紫外老化研究。这些结果表明在紫外线照射的第一阶段,由两种组分提供的基于TPPS的熔融共混物的紫外线老化具有协同作用。

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