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首页> 外文期刊>Journal of industrial and engineering chemistry >Synthesis, morphology and thermal properties of polyurethanes nanocomposites based on poly(3-hydroxybutyrate) and organoclay
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Synthesis, morphology and thermal properties of polyurethanes nanocomposites based on poly(3-hydroxybutyrate) and organoclay

机译:基于聚(3-羟基丁酸酯)和有机粘土的聚氨酯纳米复合材料的合成,形貌和热性能

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摘要

Segmented poly(ester-ether urethane)s/organoclay nanocomposites based on bacterial poly(3-hydro-xybutyrate) (PHB) and poly(ε-caprolactone)-b-poly(ethylene glycol)-b-poly(ε-caprolactone) (PCL-PEG-PCL triblock copolymer) with Cloisite~R 30B organoclay (C30B) were prepared by solution intercalation method. XRD, SEM and TEM results showed good dispersion of clay particles in polyurethane matrix. The presence of C30B increased T_g of PCL-PEG-PCL soft segments and the crystallization rate of PHB and PCL-PEG-PCL segments. C30B caused an enhancement in polyurethanes thermal stability and had an accelerating effect upon the main thermal decomposition of the polymer matrix as indicated by the lower activation energy (E_a) of decomposition compared to virgin materials, estimated using Kissinger-Akahira-Sunose isoconversional method.
机译:基于细菌聚(3-氢-羟基丁酸酯)(PHB)和聚(ε-己内酯)-b-聚(乙二醇)-b-聚(ε-己内酯)的分段聚(酯-醚氨基甲酸酯)/有机粘土纳米复合材料通过溶液插层法制备了具有Cloisite〜R 30B有机粘土(C30B)的(PCL-PEG-PCL三嵌段共聚物)。 XRD,SEM和TEM结果表明粘土颗粒在聚氨酯基体中具有良好的分散性。 C30B的存在增加了PCL-PEG-PCL软链段的T_g以及PHB和PCL-PEG-PCL链段的结晶速率。 C30B增强了聚氨酯的热稳定性,并且对聚合物基体的主要热分解产生了加速作用,这是通过使用基辛格-赤平-Sunose同转化方法估算的,与原始材料相比,其分解活化能较低(E_a),表明了这一点。

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