• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Transcrystallinity effects in high-density polyethylene. II. Determination of kinetics parameters
【24h】

Transcrystallinity effects in high-density polyethylene. II. Determination of kinetics parameters

机译：高密度聚乙烯中的结晶度效应。二。动力学参数的确定

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Transcrystallinity may occur during differential scanning calorimetry analysis at the surfaces of the samples. In such a case, measurements may be unsuitable. We propose simple methods for the determination of intrinsic crystallization data that are accurate for the polymer and for the determination of the nucleating ability of the surfaces. These methods are based on the experimental analysis of the crystallization of samples with different and calibrated thicknesses during experiments at different constant cooling rates. Analysis of thin samples allowed the characterization of transcrystallinity, whereas analysis of at least three samples of different thicknesses allowed us to determine the true crystallization kinetics of the bulk material. These two techniques were independent of each other and were successfully applied to the case of a high-density polyethylene. The determinations were verified with simple analytical models. A further extension could be the study of the nucleating ability of different substrates. (C) 2002 Wiley Periodicals, Inc. [References: 26]
机译：在差示扫描量热分析过程中，样品表面可能会发生转结晶度。在这种情况下，测量可能不合适。我们提出用于确定固有结晶数据的简单方法，该方法对于聚合物是准确的，并且对于表面成核能力的确定。这些方法基于在不同的恒定冷却速率下，在实验过程中对厚度不同和校准厚度的样品进行结晶的实验分析。薄样品的分析可以表征转结晶度，而至少三个不同厚度的样品的分析可以确定块状材料的真实结晶动力学。这两种技术彼此独立，并且已成功应用于高密度聚乙烯的情况。通过简单的分析模型验证了测定结果。进一步的扩展可能是对不同底物成核能力的研究。 （C）2002 Wiley Periodicals，Inc. [参考：26]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号