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Development of degradable poly(ethylene terephthalate)‐based nanocomposites with the aid of polylactic acid and graphenic materials: Thermal, thermo‐oxidative and hydrolytic degradation characteristics
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-09-05 , DOI: 10.1002/app.48466 Seyed Mohammad Ali Jafari 1 , R. Khajavi 1 , V. Goodarzi 2 , M. R. Kalaee 1 , H. A. Khonakdar 1
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2019-09-05 , DOI: 10.1002/app.48466 Seyed Mohammad Ali Jafari 1 , R. Khajavi 1 , V. Goodarzi 2 , M. R. Kalaee 1 , H. A. Khonakdar 1
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Poly(ethylene terephthalate)/poly(lactic acid) (PET/PLA) blends with composition of 90/10 and 75/25 (wt %/wt %) along with two types of graphenic materials, namely graphene oxide (GO) and exfoliated graphite (xGnP), were prepared through one‐step melt mixing process. The Thermal, thermo‐oxidative, and hydrolytic degradation characteristics of the developed degradable PET‐based nanocomposites were investigated. Thermal degradation studies by thermogravimetry analysis and melt rheological analysis in N2 atmosphere, revealed that unlike xGnP, the addition of GO to the blends reduced their thermal stability leading to reduction of viscosity and elasticity of the blends. The behavior was attributed to the role of GO in enhancing the chain scission reactions. In the air atmosphere, the barrier properties of the graphenic materials prevailed. Compared to xGnP, the relatively well‐dispersed GO showed better barrier against oxygen and increased the thermo‐oxidative stability of the blends. Investigation of the hydrocatalytic degradation of developed systems, at different pH of 2 and 4, over a period of 40 days at 37 °C, showed that the amount of weight loss of the GO‐containing nanocomposite systems was higher than that of xGnP. The overall results of thermal, thermo‐oxidative, and hydrocatalytic degradation studies confirmed the prominent role of GO in the development of degradable PET‐based products. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48466.
中文翻译：
借助聚乳酸和石墨材料开发可降解的聚对苯二甲酸乙二醇酯基纳米复合材料：热，热氧化和水解降解特性
聚对苯二甲酸乙二酯/聚乳酸（PET / PLA）与90％和75/25（wt％/ wt％）的成分以及两种石墨烯材料共混，即氧化石墨烯（GO）和剥落的石墨烯石墨（xGnP）是通过一步熔融混合工艺制备的。研究了已开发的可降解PET基纳米复合材料的热，热氧化和水解降解特性。通过N 2的热重分析和熔体流变学分析进行热降解研究气氛表明，与xGnP不同的是，在共混物中添加GO会降低其热稳定性，从而导致共混物的粘度和弹性降低。该行为归因于GO在增强断链反应中的作用。在大气中，石墨材料的阻隔性能占主导。与xGnP相比，相对分散的GO表现出更好的氧气阻隔性，并提高了共混物的热氧化稳定性。在37°C下40天的不同pH值为2和4的发达系统的水催化降解研究表明，含GO的纳米复合材料系统的失重量高于xGnP。热，热氧化，水催化降解研究证实了GO在可降解PET基产品开发中的重要作用。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学2020，137，48466。
更新日期：2019-12-09
中文翻译：
借助聚乳酸和石墨材料开发可降解的聚对苯二甲酸乙二醇酯基纳米复合材料：热，热氧化和水解降解特性
聚对苯二甲酸乙二酯/聚乳酸（PET / PLA）与90％和75/25（wt％/ wt％）的成分以及两种石墨烯材料共混，即氧化石墨烯（GO）和剥落的石墨烯石墨（xGnP）是通过一步熔融混合工艺制备的。研究了已开发的可降解PET基纳米复合材料的热，热氧化和水解降解特性。通过N 2的热重分析和熔体流变学分析进行热降解研究气氛表明，与xGnP不同的是，在共混物中添加GO会降低其热稳定性，从而导致共混物的粘度和弹性降低。该行为归因于GO在增强断链反应中的作用。在大气中，石墨材料的阻隔性能占主导。与xGnP相比，相对分散的GO表现出更好的氧气阻隔性，并提高了共混物的热氧化稳定性。在37°C下40天的不同pH值为2和4的发达系统的水催化降解研究表明，含GO的纳米复合材料系统的失重量高于xGnP。热，热氧化，水催化降解研究证实了GO在可降解PET基产品开发中的重要作用。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学2020，137，48466。
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