中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (05): 500-503.DOI: 10.3724/SP.J.1095.2011.00521

• 研究论文 • 上一篇    下一篇

碳酸钙粒子增韧高密度聚乙烯的脆韧转变—Wu氏增韧理论聚合物共混物脆韧转变判据的适用条件

胡跃鑫1,2,冯玉林1,2,姜伟1*   

  1. (1.中国科学院长春应用化学研究所，高分子物理与化学国家重点实验室 长春130022；2.中国科学院研究生院 北京)
  • 收稿日期:2010-09-06 修回日期:2010-10-27 出版日期:2011-05-10 发布日期:2011-05-10
  • 通讯作者: 姜伟，研究员; Tel:0431-85262151; Fax:0431-85262126; E-mail:wjiang@ciac.jl.cn; 研究方向：高聚物结构与性能
  • 基金资助:
    吉林省科技发展计划项目（20080506）

High-density Polyethylene Toughened with Calcium Carbonate Filler Particles--Applicability of Wu′ Criterion for Brittle-Ductile Transition of Polymer Blends

HU Yuexin1,2, FENG Yulin1,2, JIANG Wei1*   

  1. (1.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022;
    2.Graduate School of Chinese Academy of Sciences,Beijing)
  • Received:2010-09-06 Revised:2010-10-27 Published:2011-05-10 Online:2011-05-10
  • Contact: wei jiang

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摘要：

采用不同尺寸的碳酸钙粒子增韧高密度聚乙烯，研究了不同温度下共混体系的临界粒子间距与碳酸钙粒子尺寸和含量之间的关系，确定了温度是Wu氏增韧理论临界粒子间判据适用性的重要影响因素。 结果表明，在17 ℃下，临界粒子间距与碳酸钙粒子的尺寸和含量无关，该条件下Wu氏增韧理论临界粒子间距判据是适用的；而随着温度的升高，发现临界粒子间距依赖于碳酸钙粒子的尺寸，表明高温条件下，Wu氏增韧理论临界粒子间距判据不再适用。

关键词: 聚合物增韧, 粒子间距, 脆韧转变

Abstract:

High density polyethylene was toughened by calcium carbonate(CaCO3) with different particle sizes. The relationship between critical interparticle distance(IDc) and CaCO3 content and particle size was studied at different temperatures. The purpose is to clarify that temperature is one of the important parameters for applicability of Wu′s criterion. The results indicate that the IDc is almost independent of CaCO3 content and particle size at 17 ℃, that is, the criterion is applicable to this case. With an increase in the temperature, the results clearly show that IDc depends on the CaCO3 particle size at higher temperatures, that is, the criterion is inapplicable at higher temperatures.

Key words: toughening polymer, brittle-ductile transition, interparticle distance

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