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首页> 美国卫生研究院文献>Polymers >Isothermal Crystallization and Rheology Properties of Isotactic Polypropylene/Bacterial Cellulose Composite
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Isothermal Crystallization and Rheology Properties of Isotactic Polypropylene/Bacterial Cellulose Composite

机译：等规聚丙烯/细菌纤维素复合材料的等温结晶和流变特性

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摘要

Bacterial cellulose (BC) is a new kind of cellulose with great potential in enhancing preparation of isotactic Polypropylene (iPP) composites, which have been found with excellent performance. However, the interface compatibility between BC and iPP is poor. In this study, iPP/BC composites were prepared by solution mixing. Esterification modified BC (CO) and Maleic anhydride grafted polypropylene (MAPP) added as a compatibilizer was both used to improve the interfacial compatibility of the iPP/BC composites. The rheology and isothermal crystallization behavior of the composites was tested and discussed. The result shows that the complex viscosity and storage modulus of the composite significantly increase in the rule iPP, iPP/BC2, iPP/CO2, and M-iPP/BC3, which indicates that the compatibility of the composite increases as this rule. According to the isothermal crystallization kinetics result, the crystal growth mode of iPP was not affected by the addition of BC and the interfacial compatibility. The spherulite growth rate of the iPP/BC composite increases with increasing crystallization temperature. Especially, the value decreases as the same rule with the complex viscosity and storage modulus of the composite at the same isothermal crystallization temperature. These results suggest that the interface compatibility of iPP/BC composites is greatly improved and the interface compatibility of the M-iPP/BC3 is better than the iPP/CO2.
机译：细菌纤维素（BC）是一种新型纤维素，在增强等规聚丙烯（iPP）复合材料的制备方面具有巨大潜力，已发现其性能优异。但是，BC和iPP之间的接口兼容性很差。在这项研究中，iPP / BC复合材料是通过溶液混合制备的。作为增容剂添加的酯化改性BC（CO）和马来酸酐接枝聚丙烯（MAPP）均用于改善iPP / BC复合材料的界面相容性。测试并讨论了复合材料的流变性和等温结晶行为。结果表明，按照iPP，iPP / BC2，iPP / CO2和M-iPP / BC3规则，复合材料的复数粘度和储能模量显着增加，这表明复合材料的相容性随该规则增加。根据等温结晶动力学结果，iPP的晶体生长方式不受BC的添加和界面相容性的影响。 iPP / BC复合材料的球晶生长速率随结晶温度的升高而增加。特别地，在相同的等温结晶温度下，该值随着复合物的复数粘度和储能模量而按相同的规律减小。这些结果表明，iPP / BC复合材料的界面相容性大大提高，M-iPP / BC3的界面相容性优于iPP / CO2。

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