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首页> 外文期刊>Journal of Applied Polymer Science >Isothermal Crystallization Kinetics of High-Flow Nylon 6 by Differential Scanning Calorimetry
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Isothermal Crystallization Kinetics of High-Flow Nylon 6 by Differential Scanning Calorimetry

机译：差示扫描量热法测定高流动尼龙6的等温结晶动力学

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The isothermal crystallization kinetics have been investigated with differential scanning calorimetry for high-flow nylon 6, which was prepared with the mother salt of polyamidoamine dendrimers and p-phthalic acid, an end-capping agent, and epsilon-caprolactam by in situ polymerization. The Avrami equation has been adopted to study the crystallization kinetics. In comparison with pure nylon 6, the high-flow nylon 6 has a lower crystallization rate, which varies with the generation and content of polyamidoamine units in the nylon 6 matrix. The traditional analysis indicates that the values of the Avrami parameters calculated from the half-time of crystallization might be more in agreement with the actual crystallization mechanism than the parameters determined from the Avrami plots. The Avrami exponents of the high-flow nylon 6 range from 2.1 to 2.4, and this means that the crystallization of the high-flow nylon 6 is a two-dimensional growth process. The activation energies of the high-flow nylon 6, which were determined by the Arrhenius method, range from -293 to -382 kJ/mol. The activation energies decrease with the increase in the generation of polyamidoamine units but increase with the increase in the content of polyamidoamine units in the nylon 6 matrix. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 29302937,2009
机译：用差示扫描量热法研究了高流动性尼龙6的等温结晶动力学，该高流动性尼龙6是由聚酰胺基胺树枝状聚合物的母盐和对苯二甲酸，端封剂和ε-己内酰胺通过原位聚合制备的。已采用Avrami方程来研究结晶动力学。与纯尼龙6相比，高流动性尼龙6的结晶速率较低，该速率随尼龙6基体中聚酰胺基胺单元的产生和含量而变化。传统分析表明，从半结晶时间计算出的Avrami参数值可能比从Avrami图确定的参数更符合实际的结晶机理。高流动性尼龙6的Avrami指数在2.1至2.4的范围内，这意味着高流动性尼龙6的结晶是二维生长过程。通过Arrhenius方法测定的高流动性尼龙6的活化能为-293至-382kJ / mol。活化能随着聚酰胺胺单元的生成的增加而降低，但是随着尼龙6基质中聚酰胺胺单元的含量的增加而增加。 （C）2008 Wiley Periodicals，Inc. J Appl Polym Sci 111：29302937,2009

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