油酸修饰纳米CaCO3对PP结晶行为和力学性能的影响

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油酸修饰纳米CaCO3对PP结晶行为和力学性能的影响

申屠宝卿; 李继鹏; 翁志学

State Key Laboratory of Polymer Reaction Engineering, Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-12-28 发布日期:2006-12-28
通讯作者: 申屠宝卿

Effect of oleic acid modified nano-CaCO3 on the crystallization behavior and mechanical properties of polypropylene

SHENTU Baoqing; LI Jipeng; WENG Zhixue

State Key Laboratory of Polymer Reaction Engineering, Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-12-28 Published:2006-12-28
Contact: SHENTU Baoqing

摘要/Abstract

摘要： Oleic acid (OA)-modified CaCO3 nanoparticles were prepared using surface modification method. Infrared spectroscopy (IR) was used to investigate the structure of the modified CaCO3 nanoparticles, and the result showed that OA attached to the surface of CaCO3 nanoparticles with the ionic bond. Effect of OA concentration on the dispersion stability of CaCO3 in heptane was also studied, and the result indicated that modified CaCO3 nanoparticles dispersed in heptane more stably than unmodified ones. The optimal proportion of OA to CaCO3 was established. The effect of modified CaCO3 nanoparticles on crystallization behavior of polypropylene (PP) was studied by means of DSC. It was found that CaCO3 significantly increased the crystallization temperature, crystal-lization degree and crystallization rate of PP, and the addition of modified CaCO3 nanoparticles can lead to the for-mation of β-crystal PP. Effect of the modified CaCO3 content on mechanical properties of PP/CaCO3 nanocompo-sites was also studied. The results showed that the modified CaCO3 can effectively improve the mechanical proper-ties of PP. In comparison with PP, the impact strength of PP/CaCO3 nanocomposites increased by about 65% and the flexural strength increased by about 20%.

关键词: polypropylene;nano-CaCO3;oleic acid;crystallization;mechanical properties

Abstract: Oleic acid (OA)-modified CaCO3 nanoparticles were prepared using surface modification method. Infrared spectroscopy (IR) was used to investigate the structure of the modified CaCO3 nanoparticles, and the result showed that OA attached to the surface of CaCO3 nanoparticles with the ionic bond. Effect of OA concentration on the dispersion stability of CaCO3 in heptane was also studied, and the result indicated that modified CaCO3 nanoparticles dispersed in heptane more stably than unmodified ones. The optimal proportion of OA to CaCO3 was established. The effect of modified CaCO3 nanoparticles on crystallization behavior of polypropylene (PP) was studied by means of DSC. It was found that CaCO3 significantly increased the crystallization temperature, crystal-lization degree and crystallization rate of PP, and the addition of modified CaCO3 nanoparticles can lead to the for-mation of β-crystal PP. Effect of the modified CaCO3 content on mechanical properties of PP/CaCO3 nanocompo-sites was also studied. The results showed that the modified CaCO3 can effectively improve the mechanical proper-ties of PP. In comparison with PP, the impact strength of PP/CaCO3 nanocomposites increased by about 65% and the flexural strength increased by about 20%.

Key words: polypropylene, nano-CaCO3, oleic acid, crystallization, mechanical properties

申屠宝卿, 李继鹏, 翁志学. 油酸修饰纳米CaCO3对PP结晶行为和力学性能的影响[J]. CIESC Journal.

SHENTU ,Baoqing, LI ,Jipeng, WENG ,Zhixue. Effect of oleic acid modified nano-CaCO3 on the crystallization behavior and mechanical properties of polypropylene[J]. .

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油酸修饰纳米CaCO3对PP结晶行为和力学性能的影响

Effect of oleic acid modified nano-CaCO3 on the crystallization behavior and mechanical properties of polypropylene

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