高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (4): 701.

• 研究论文 • 上一篇    下一篇

穿插程度对高分子链结晶初始阶段的影响

张竹青, 杨小震   

  1. 中国科学院化学研究所, 高分子物理和化学国家重点实验室, 高分子科学与材料联合实验室, 北京 100080
  • 收稿日期:2005-04-22 出版日期:2006-04-10 发布日期:2006-04-10
  • 通讯作者: 杨小震(1947年出生),男,研究员,博士生导师,从事高分子计算机模拟研究. E-mail: yangx@pplas.icas.ac.cn
  • 基金资助:

     国家“八六三”计划项目(批准号: 2002AA336120)、 国家“九七三”计划项目(批准号: 2004CB720606)和国家自然科学基金(批准号: 20074041)资助.

Influence of Interpenetration Degree on Initial Stage of Polymer Chain Crystallization

ZHANG Zhu-Qing, YANG Xiao-Zhen   

  1. State Key Laboratory of Polymer Physics and Chemistry, Joint Laboratory of Polymer Science and Materials,
    Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2005-04-22 Online:2006-04-10 Published:2006-04-10
  • Contact: YANG Xiao-Zhen,E-mail: yangx@pplas.icas.ac.cn

摘要:

用分子动力学方法模拟了具有不同穿插程度的寡链凝聚体系结晶初始阶段的有序化过程. 链间穿插程度通过径向分布函数的统计进行表征. 模拟计算结果表明, 链间的穿插程度对体系的有序化过程具有明显的影响, 穿插程度越小的体系有序化越快, 形成的有序结构也更完整. 与实验结果的比较表明, 在聚合物粒子结晶的初始阶段, 体系由穿插引起的缠结就已经起到了作用.

关键词: 分子动力学; 高分子线团; 穿插程度; 结晶初始阶段

Abstract:

In the present study, crystallization at the initial stage of six polyethylene chains(each chain containing 600CH2 in backbone) was simulated by means of molecular dynamics. Since the initial structures possess different degrees of interpenetration, the effect of entanglements, which arises from the interpenetration, on the crystallization was examined. The result shows that the degree of the interpenetration in the initial structures does influence the initial stage of polymer chain crystallization: the less interpenetration, the more rapid orientation behavior, and the more perfect lamella is obtained.

Key words: Molecular dynamics; Polymer coils; Degree of interpenetration; Initial stage of crystallization

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