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首页> 外文期刊>Journal of industrial and engineering chemistry >Effect of starch content on the non-isothermal crystallization behavior of HDPE/silicate nanocomposites
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Effect of starch content on the non-isothermal crystallization behavior of HDPE/silicate nanocomposites

机译：淀粉含量对HDPE /硅酸盐纳米复合材料非等温结晶行为的影响

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摘要

The non-isothermal crystallization behavior and silicate dispersion of high-density polyethylene (HDPE)/modified montmorillonite (20A) composites containing starch masterbatch (starch MB) were investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), and transmission electron microscope (TEM). The dispersion of 20A in HDPE matrix depended on the starch content. The Avrami analysis shows that the non-isothermal crystallization process of the HDPE/20A composites followed the Avrami equation with Avrami exponent value in the range of 1.5-2.5. The activation energies calculated by Kissinger method were 350 kj/mol for HDPE-5,462 kJ/mol for HD90-5,542 kJ/mol for HD80-5, and 411 kJ/mol for HD70-5. The activities of nucleation of HD90-5 and HD80-5 were 0.89 and 0.88, respectively but the value of HD70-5 was 0.61. These behaviors can be interpreted by the fact that the increase of the starch MB content enhances the dispersion of clay in HDPE matrix and the good dispersion of 20A affects the degree of super cooling and the nucleation activity of silicate.
机译：通过差示扫描量热法（DSC），X射线衍射（XRD）和差示扫描量热法研究了高密度聚乙烯（HDPE）/改性蒙脱土（20A）含淀粉母料（淀粉MB）的复合材料的非等温结晶行为和硅酸盐分散性。透射电子显微镜（TEM）。 HDPE基质中20A的分散度取决于淀粉含量。 Avrami分析表明，HDPE / 20A复合材料的非等温结晶过程遵循Avrami方程，Avrami指数值在1.5-2.5范围内。通过基辛格方法计算出的活化能对于HDPE-5为350kj / mol，对于HD90-5462kJ / mol，对于HD80-5为542kJ / mol，对于HD70-5为411kJ / mol。 HD90-5和HD80-5的成核活性分别为0.89和0.88，但HD70-5的值为0.61。这些行为可以通过以下事实来解释：淀粉MB含量的增加会增强粘土在HDPE基质中的分散性，而20A的良好分散性会影响过冷度和硅酸盐的成核活性。

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