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首页> 外文期刊>Journal of Applied Polymer Science >Effect of ultrafine, fully vulcanized acrylate powdered rubber on the mechanical properties and crystallization behavior of nylon 6
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Effect of ultrafine, fully vulcanized acrylate powdered rubber on the mechanical properties and crystallization behavior of nylon 6

机译：超细全硫化丙烯酸酯粉状橡胶对尼龙6力学性能和结晶行为的影响

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摘要

Nylon 6 (PA6) is a widely used engineering plastic. However, its poor toughness limits its applications. Therefore, toughening PA6 has been a point of interest in the field of PA6 modification. Generally, toughening a plastic with an elastomer reduces the stiffness and heat distortion temperature of the matrix. It has been an important goal of polymer researchers to find a way of toughening PA6 without reductions in its stiffness and heat distortion temperature. In this study, a new kind of material-an ultrafine, fully vulcanized acrylate powdered rubber (UFAPR)-was used to toughen PA6 through melt blending. The influence of UFAPR on the isothermal crystallization kinetics and nonisothermal crystallization behavior of PA was studied with differential scanning calorimetry. The results showed that, with the addition of a little UFAPR, the crystallization rate of PA could be increased, the crystallization temperature could be augmented, and the crystal size distribution of the crystal grain could be narrowed. The changes in the free energy perpendicular to the crystal nucleus were consistent with the results of an Avrami equation according to the theory of Hoffman. The unit surface free energy of the radially developing crystal spherulites decreased with an increasing amount of UFAPR. The results for the mechanical properties, crystalline structure, and crystallization kinetics of PA6/UFAPR composites showed that UFAPR was not only a good toughening agent for PA6 but also an excellent nucleation agent for PA6. (C) 2003 Wiley Periodicals, Inc. [References: 18]
机译：尼龙6（PA6）是一种广泛使用的工程塑料。但是，其韧性差限制了其应用。因此，增韧PA6已经成为PA6改性领域中的关注点。通常，用弹性体增韧塑料会降低基体的刚度和热变形温度。聚合物研究人员的一个重要目标是找到一种增韧PA6而不降低其刚度和热变形温度的方法。在这项研究中，一种新型材料-超细，完全硫化的丙烯酸酯粉状橡胶（UFAPR）-通过熔融共混来增韧PA6。用差示扫描量热法研究了UFAPR对PA的等温结晶动力学和非等温结晶行为的影响。结果表明，加入少量的UFAPR，可以提高PA的结晶速率，可以提高结晶温度，可以缩小晶粒的晶粒尺寸分布。垂直于晶核的自由能的变化与根据霍夫曼理论的Avrami方程的​​结果一致。随着UFAPR的增加，径向发展的球晶的单位表面自由能降低。 PA6 / UFAPR复合材料的力学性能，晶体结构和结晶动力学结果表明，UFAPR不仅是PA6的良好增韧剂，而且是PA6的优异成核剂。 （C）2003 Wiley Periodicals，Inc. [参考：18]

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