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首页> 外文期刊>Journal of Polymers and the Environment >Effect of Interfacial Modifiers on Mechanical and Physical Properties of the PHB Composite with High Wood Flour Content
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Effect of Interfacial Modifiers on Mechanical and Physical Properties of the PHB Composite with High Wood Flour Content

机译：界面改性剂对高木粉含量PHB复合材料力学和物理性能的影响

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摘要

To explore the commercial viability of Polyhydroxybutyrate (PHB)/wood flour (WF) composites, systems were produced at industry-standard levels of fiber loading. Further, four interfacial modifiers were selected to improve the mechanical properties of PHB/WF composites, including maleated PHB (PHB-g-MA), a low molecular weight epoxy, a low molecular weight polyester, and polymethylene-diphenyl-diisocyante (pMDI). Results showed that all modifiers resulted in improvements in tensile strength and modulus, however, pMDI showed the highest improvements. The pMDI modifier also improved water uptake of the composites. Study of the fracture surfaces showed signs of improved fiber bonding, as did morphological studies by dynamic mechanical analysis (DMA), and differential scanning calorimetry (DSC). Interpretation of the DSC and DMA results indicate possible reactions with lubricant, and interactions between PHB and wood fibers with the addition of pMDI.
机译：为了探索聚羟基丁酸酯（PHB）/木粉（WF）复合材料的商业可行性，以行业标准水平的纤维负载量生产了系统。此外，选择了四种界面改性剂来改善PHB / WF复合材料的机械性能，包括马来酸化PHB（PHB-g-MA），低分子量环氧树脂，低分子量聚酯和聚亚甲基-二苯基-二异氰酸酯（pMDI） 。结果表明，所有改性剂均能提高拉伸强度和模量，但pMDI表现出最高的改进。 pMDI改性剂还改善了复合材料的吸水率。断裂表面的研究显示出纤维结合改善的迹象，通过动态力学分析（DMA）和差示扫描量热法（DSC）进行的形态学研究也是如此。 DSC和DMA结果的解释表明与润滑剂可能发生反应，以及在添加pMDI的情况下PHB和木纤维之间的相互作用。

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