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Study on non-isothermal crystallization behavior of isotactic polypropylene/bacterial cellulose composites

机译：等规聚丙烯/细菌纤维素复合材料的非等温结晶行为研究

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Bacterial cellulose (BC) has great potential to be used as a new filler in reinforced isotactic polypropylene (iPP) due to its characteristics of high crystallinity, biodegradability and efficient mechanical properties. But the compatibility between BC and iPP is poor. The esterification modified BC (CO) and addition of maleic anhydride grafted polypropylene (MAPP) as a compatibilizer were both used to improve interfacial compatibility of iPP and BC to prepare iPP/BC composites, and the non-isothermal crystallization behavior of isotactic polypropylene/bacterial cellulose composites was discussed. The results showed that with the addition of CO or MAPP, the compatibility of iPP/BC composites greatly improved. Moreover, BC addition was found to enhance iPP crystallization due to homogeneous and heterogeneous nucleation effects. In non-isothermal crystallization kinetics, it was found that the Jeziorny method and ?–t analysis are more accurate to describe non-isothermal crystallization behavior of iPP/BC composites. The results showed that the non-isothermal crystallization rates increase in the order of iPP/BC2, iPP, iPP/CO2, and M-iPP/BC3, indicating that the compatibility of iPP/BC composites. Moreover, the cooling rate have greatly influence on non-isothermal crystallization behavior of iPP/BC composites.
机译：细菌纤维素（BC）具有高结晶度，可生物降解性和高效机械性能的特点，具有作为增强等规聚丙烯（iPP）的新型填料的巨大潜力。但是，BC和iPP之间的兼容性很差。酯化改性的BC（CO）和添加马来酸酐接枝聚丙烯（MAPP）作为增容剂均用于改善iPP和BC的界面相容性，以制备iPP / BC复合材料，以及等规聚丙烯/细菌的非等温结晶行为。讨论了纤维素复合材料。结果表明，通过添加CO或MAPP，iPP / BC复合材料的相容性大大提高。此外，由于均匀和不均匀的成核作用，发现添加BC可以增强iPP结晶。在非等温结晶动力学中，发现Jeziorny方法和？ – t 分析更准确地描述了iPP / BC复合材料的非等温结晶行为。结果表明，非等温结晶速率按iPP / BC2，iPP，iPP / CO2和M-iPP / BC3的顺序增加，表明iPP / BC复合材料的相容性。而且，冷却速率对iPP / BC复合材料的非等温结晶行为有很大影响。

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