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Evaluation on the Thermo-Oxidative Degradation of PET using Prodegradant Additives

机译:使用助降解剂评估PET的热氧化降解

摘要

Objectives: Transition metal stearates are example of potent pro-degradants reported to work at trace levels. They speed up the oxidative reaction leading to polymeric chain cleavage and reduction in molecular mass causing bio-assimilation of plastic waste. In this paper, attempt to analyze the effect of different loading amounts of cobalt stearate (CS) on the polymeric matrix of polyethylene terephthalate (PET) has been reported. Methods/Statistical Analysis: Formulated compounds were melt blended using an extruder and the extrudates were pelletized prior to molding into bone shaped specimens using an injection molding machine for characterization purpose. Findings: The effects on the incorporation of CS on the mechanical properties revealed that CS influences its tensile strength and elongation at break (%) at processing stage and studies based on Fourier Transform Infrared Spectroscopy (FTIR) spectra and carbonyl index (CI) measurements indicate that blends’ consisting of 0.25CS contributes to thermal degradation of PET. Application/Improvements: The outcome of this study would assist in the production of biodegradable materials which could decompose in shorter time frame as well as reduces plastic waste in environment.
机译:目标:过渡金属硬脂酸盐是据报道可在痕量水平下起作用的强效降解助剂的实例。它们加快了氧化反应,导致聚合物链断裂和分子量降低,从而导致塑料废物的生物同化。在本文中,已经尝试分析不同负载量的硬脂酸钴(CS)对聚对苯二甲酸乙二醇酯(PET)的聚合物基体的影响。方法/统计分析:使用挤出机将配制的化合物熔融共混,并将挤出物造粒,然后使用注射成型机将其成型为骨样,以进行表征。研究结果:CS的掺入对机械性能的影响表明,CS在加工阶段会影响其拉伸强度和断裂伸长率(%),并且基于傅立叶变换红外光谱(FTIR)光谱和羰基指数(CI)测量的研究表明由0.25CS组成的混合物会导致PET的热降解。应用/改进:这项研究的结果将有助于生产可生物降解的材料,这种材料可在更短的时间内分解,并减少环境中的塑料浪费。

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