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首页> 外文期刊>Journal of Applied Polymer Science >Nonisothermal crystallization kinetics of linear bimodal-polyethylene (LBPE) and LBPE/low-density polyethylene blends
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Nonisothermal crystallization kinetics of linear bimodal-polyethylene (LBPE) and LBPE/low-density polyethylene blends

机译：线性双峰聚乙烯（LBPE）和LBPE /低密度聚乙烯共混物的非等温结晶动力学

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Nonisothermal crystallization kinetics of linear bimodal-polyethylene (LBPE) and the blends of LBPE/low-density polyethylene (LDPE) were studied using DSC at various scanning rates. The Avrami analysis modified by Jeziorny and a method developed by Mo were employed to describe the nonisothermal crystallization process of LBPE and LBPE/LDPE blends. The theory of Ozawa was also used to analyze the LBPE DSC data. Kinetic parameters such as, for example, the Avrami exponent (n), the kinetic crystallization rate constant (Z(c)), the crystallization peak temperature (T-P), and the half-time of crystallization (t(1/2)) were determined at various scanning rates. The appearance of double melting peaks and double crystallization peaks in the heating and cooling DSC curves of LBPE/LDPE blends indicated that LBPE and LDPE could crystallize, respectively. As a result of these studies, the Z(c) of LBPE increases with the increase of cooling rates and the T of LBPE for LBPE/LDPE blends first increases with increasing LBPE content in the blends and reaches its maximum, then decreases as the LBPE content further increases. (C) 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 2431-2437, 2003. [References: 10]
机译：使用DSC在各种扫描速率下研究了线性双峰聚乙烯（LBPE）和LBPE /低密度聚乙烯（LDPE）的共混物的非等温结晶动力学。用Jeziorny改进的Avrami分析和Mo开发的方法描述了LBPE和LBPE / LDPE共混物的非等温结晶过程。小泽的理论也被用来分析LBPE DSC数据。动力学参数，例如Avrami指数（n），动力学结晶速率常数（Z（c）），结晶峰值温度（TP）和结晶时间（t（1/2））是在各种扫描速率下确定的。 LBPE / LDPE共混物的加热和冷却DSC曲线中出现双熔融峰和双结晶峰，表明LBPE和LDPE可以分别结晶。这些研究的结果是，LBPE的Z（c）随着冷却速率的增加而增加，而LBPE / LDPE共混物的LBPE的T首先随着共混物中LBPE含量的增加而增加，并达到最大值，然后随着LBPE的增加而降低内容进一步增加。 （C）2003 Wiley Periodicals，Inc. J Appl Polym Sci 89：2431-2437，2003。[参考：10]

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