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首页> 外文期刊>Journal of Applied Polymer Science >Isothermal crystallization kinetics and melting behavior of polyamide 11/silica nanocomposites prepared by in situ melt polymerization
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Isothermal crystallization kinetics and melting behavior of polyamide 11/silica nanocomposites prepared by in situ melt polymerization

机译：原位熔融聚合制备聚酰胺11 /二氧化硅纳米复合材料的等温结晶动力学和熔融行为

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摘要

Polyamide 11 (PA 11)/silica nanocomposites were prepared via in situ melt polymerization by the dispersion of hydrophobic silica in 11-aminoundecanoic acid monomer. Their isothermal crystallization process and melting behaviors were analyzed by differential scanning calorimetry. The isothermal crystallization kinetics was analyzed by the Avrami equation. The obtained data showed that the model of nucleation and growth of PA 11 was not affected after the incorporation of silica and was a mixture with two-dimensional, circular, three-dimensional growth with thermal nucleation. Double and single melting peaks were observed depending on the crystallization temperature. The equilibrium melting point of samples was evaluated, and the spherulites growth kinetics parameters and fold surface free energy were further calculated according to the classical theories.
机译：聚酰胺11（PA 11）/二氧化硅纳米复合材料是通过将疏水性二氧化硅分散在11-氨基十一烷酸单体中进行原位熔融聚合制备的。通过差示扫描量热法分析了它们的等温结晶过程和熔融行为。通过Avrami方程分析了等温结晶动力学。所获得的数据表明，在掺入二氧化硅之后，PA 11的成核和生长模型不受影响，并且是具有热成核的二维，圆形，三维生长的混合物。根据结晶温度观察到双和单熔化峰。评估了样品的平衡熔点，并根据经典理论进一步计算了球晶的生长动力学参数和折叠表面自由能。

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