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首页> 外文期刊>Journal of Applied Polymer Science >Thermal and Mechanical Properties of a Polyhydroxyalkanoate Plasticized with Biobased Epoxidized Broccoli Oil
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Thermal and Mechanical Properties of a Polyhydroxyalkanoate Plasticized with Biobased Epoxidized Broccoli Oil

机译：生物基环氧西兰花油增塑的聚羟基链烷酸酯的热力学性能

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摘要

Broccoli oil was epoxidized through a simple process with performic acid generated in situ without any metal catalyst. The resulting epoxidized broccoli oil (EBO) was characterized by ~1H-NMR, ~(13)C-NMR, Fourier transform infrared spectroscopy, and mass spectroscopy and after a 72-h reaction, and all initial double bonds were epoxidized without further degradation of the triglyceride. EBO was used thereafter as an additive in the formulation of polyhydroxyalkanoate (PHA) films. The effects of EBO on the thermal and mechanical properties of PHA were studied with chromatography combined with thermal and mechanical analysis. From static and dynamic mechanical characterizations of PHA/EBO blends, EBO could be considered a good plasticizer for PHA. When blended with PHA, EBO caused a decrease in the elastic modulus, an increase in the elongation at break, and a decrease in the glasstransition temperature. The beneficial effect of EBO on the thermal stability of the PHA was confirmed by thermogravimetric analysis combined with size exclusion chromatography. The water vapor permeability of the PHA-containing EBO films was also controlled by the EBO content.
机译：西兰花油通过简单的方法用原位生成的过甲酸在没有任何金属催化剂的情况下进行环氧化。所得环氧化西兰花油（EBO）用〜1H-NMR，〜（13）C-NMR，傅立叶变换红外光谱和质谱以及72小时反应后进行表征，所有初始双键均被环氧化而不进一步降解甘油三酸酯。此后，EBO用作聚羟基链烷酸酯（PHA）薄膜配方中的添加剂。结合色谱和热力学分析，研究了EBO对PHA热力学性能的影响。从PHA / EBO混合物的静态和动态力学特性可以看出，EBO被认为是PHA的良好增塑剂。当与PHA混合时，EBO导致弹性模量降低，断裂伸长率增加和玻璃化转变温度降低。通过热重分析结合尺寸排阻色谱法证实了EBO对PHA热稳定性的有益作用。含PHA的EBO膜的水蒸气渗透性也由EBO含量控制。

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