• 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 >Experimental and theoretical investigation of solubility and diffusion of ethylene in semicrystalline PE at elevated pressures and temperatures
【24h】

Experimental and theoretical investigation of solubility and diffusion of ethylene in semicrystalline PE at elevated pressures and temperatures

机译：乙烯在高压和高温下在半结晶聚乙烯中的溶解度和扩散的实验和理论研究

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

The solubility and diffusivity of ethylene in semicrystalline polyethylene were experimentally measured using a magnetic suspension microbalance. The sorption measurements were carried out at temperatures up to 80degreesC and pressures up to 66 atm. The experimentally measured solubilities were found to decrease with increasing temperature and increased with ethylene pressure in good agreement with the predictions of the Sanchez-Lacombe lattice-fluid model. The diffusivity of ethylene in sernicrystalline polyethylene films was estimated from the reduced sorption curves using the half-time method. The experimentally determined diffusivities were compared with theoretical values predicted by a new molecular hybrid model, which combines the characteristic features of the Pace-Datyner diffusion model with those of the Kulkarni-Stern free-volume model. The ethylene diffusion coefficient was found to increase with temperature and/or the ethylene-sorbed concentration. (C) 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 953-966,2003. [References: 34]
机译：使用磁悬浮微量天平通过实验测量了乙烯在半结晶聚乙烯中的溶解度和扩散率。吸附测量是在最高80摄氏度的温度和最高66 atm的压力下进行的。发现实验测量的溶解度随温度升高而降低，并随乙烯压力升高而与Sanchez-Lacombe晶格流体模型的预测很好地吻合。使用半衰期法从减少的吸附曲线估算了乙烯在细晶聚乙烯薄膜中的扩散率。将实验确定的扩散率与新分子混合模型预测的理论值进行比较，该模型将Pace-Datyner扩散模型的特征与Kulkarni-Stern自由体积模型的特征相结合。发现乙烯扩散系数随温度和/或乙烯吸附浓度而增加。 （C）2002 Wiley Periodicals，Inc. J Appl Polym Sci 87：953-966,2003。 [参考：34]

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