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首页> 外文期刊>Journal of Applied Polymer Science >Green composites of poly(3-hydroxybutyrate) and curaua fibers: Morphology and physical, thermal, and mechanical properties
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Green composites of poly(3-hydroxybutyrate) and curaua fibers: Morphology and physical, thermal, and mechanical properties

机译：聚（3-羟基丁酸酯）和油菜纤维的绿色复合材料：形态和物理，热和机械性能

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In this article, we report the morphology and thermal, mechanical and physical properties of poly(3-hydroxybutyrate) (PHB)/curaua composites containing triethyl citrate (TEC) as the plasticizer. The composites were prepared by mechanical mixing using pristine and chemically treated fibers (10 wt %) and TEC (30 wt %) and characterized by differential scanning calorimetry, dynamic mechanical analysis, X-ray diffraction, small angle X-ray scattering, polarized optical microscopy, scanning electron microscopy, tensile tests, impact resistance test, thermodilatometry, and thermal conductivity measurements. The curaua fibers acted as nucleating agent and strongly influenced the morphology of the crystalline phase of PHB, increasing the lamella thickness, decreasing the crystal size and inducing spherulite-axialite transition. These characteristics of the PHB crystalline phase determined all the properties of the composites. The tensile properties of the composites were comparable with those of neat PHB, while the impact resistance of composites was comparable with that of plasticized PHB. The higher heat capacity and thermal expansion coefficient and the lower thermal conductivity of the composites compared with neat PHB reflect the morphological changes in the PHB crystalline phase. The strategy of developing a green polymeric material from ecofriendly components exhibiting a good balance of properties by combining curaua fibers, TEC, and PHB was successful. (C) 2016 Wiley Periodicals, Inc.
机译：在本文中，我们报道了形态学和聚（3-羟基丁酸酯）的热，机械和物理性质（PHB）/ curaua复合材料含有柠檬酸三乙酯（TEC）作为增塑剂。该复合材料通过机械混合使用原始和经化学处理的纤维（10重量％）和TEC（30重量％）制备和表征通过差示扫描量热法，动态力学分析，X射线衍射，小角X射线散射，偏振的光学显微镜，扫描电子显微镜，拉伸试验，耐冲击性试验，thermodilatometry，和热导率的测量。充当成核剂和强烈curaua纤维影响PHB的结晶相的形态，增加了片晶厚度，减小晶体尺寸和诱导球晶-axialite过渡。该PHB结晶相的这些特性确定的复合材料的所有属性。复合材料的拉伸性能与那些纯的PHB的可比性，而复合材料的耐冲击性与增塑的PHB的可比性。较高的热容量和热膨胀系数，并与纯的PHB相比，复合材料的热传导率低反映在PHB结晶相的形态变化。从发展结合curaua纤维，TEC表现出良好的性能平衡环保型组件的绿色高分子材料的战略，PHB是成功的。 （c）2016 Wiley期刊，Inc。

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