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首页> 外文期刊>Journal of Materials Science >Thermal stability, morphology, and X-ray diffraction studies of dynamically vulcanized natural rubber/chitosan blends
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Thermal stability, morphology, and X-ray diffraction studies of dynamically vulcanized natural rubber/chitosan blends

机译：动态硫化天然橡胶/壳聚糖共混物的热稳定性，形态和X射线衍射研究

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摘要

The thermal degradation behavior of cross-linked Natural Rubber/Chitosan (NR/CS) blends was studied by thermogravimetric analysis (TGA). Dicumyl peroxide (DCP) was selected as a cross-linking agent. Peroxide-cured NR/CS blends exhibit very good overall thermal properties. The activation energy of degradation was analyzed using the Horowitz–Metzger equation. Vulcanization of rubber phase in the blend increased the activation energy. From the activation energy values, it is found that among the series of the blend compositions, NR85CS15 blend vulcanized with 3 pphr DCP exhibits better thermal stability. Better adhesion between the two phases with the incorporation of DCP is achieved which results in an enhancement in the thermal stability. The DSC curve shows that, the T g of chitosan in the blend increased to 242 °C by dynamic vulcanization. The morphology of the vulcanized blends was studied by scanning electron microscopy. More uniform distribution was exhibited by the vulcanization of NR phase in the blend. X-ray diffraction (XRD) study shows an enhancement in the crystallinity by vulcanization.
机译：通过热重分析（TGA）研究了交联的天然橡胶/壳聚糖（NR / CS）共混物的热降解行为。选择过氧化二枯基（DCP）作为交联剂。过氧化物固化的NR / CS共混物表现出非常好的整体热性能。使用Horowitz-Metzger方程分析了降解的活化能。混合物中橡胶相的硫化增加了活化能。从活化能值中发现，在一系列共混物组合物中，用3 pphr DCP硫化的NR 85 CS 15 共混物表现出更好的热稳定性。通过掺入DCP，在两相之间实现了更好的粘合，从而提高了热稳定性。 DSC曲线显示，通过动态硫化，共混物中壳聚糖的T g 升高至242℃。通过扫描电子显微镜研究了硫化共混物的形态。共混物中NR相的硫化表现出更均匀的分布。 X射线衍射（XRD）研究表明，硫化可提高结晶度。

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