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熔体自由基反应法制备聚丙烯/碳纳米管复合材料

王宇杰1,2,万东1,2,于海鸥1,2,闻新1,唐涛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.中国科学院大学 北京 100039)
  • 收稿日期:2012-06-19 修回日期:2012-07-25 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 唐涛，研究员; Tel/Fax:0431-85262827; E-mail:ttang@ciac.jl.cn; 研究方向：可控聚合与纳米复合
  • 基金资助:
    国家自然基金资助项目(50873099)

Preparing Polypropylene/Carbon Nanotubes Nanocomposites by Melt Radical Grafting Reaction

WANG Yujie1,2, WAN Dong1,2, YU Haiou1,2, WEN Xin1, TANG Tao1*   

  1. (1.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
    2.University of Chinese Academy of Sciences,Beijing 100039,China) 
  • Received:2012-06-19 Revised:2012-07-25 Published:2013-04-10 Online:2013-04-10

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摘要： 以2,5-二甲基-2,5-双（叔丁基过氧基）己烷（DHBP）在聚丙烯体系中引发形成自由基，以二硫化四甲基秋兰姆（TMTD）调控自由基反应，通过熔融共混一步法制备了共价接枝的聚丙烯/碳纳米管（PP/CNTs）复合材料。 通过拉曼光谱和透射电子显微镜证明发生了共价接枝反应，并研究了PP/CNTs的结晶性能、热性能与力学性能。 结果表明，发生共价接枝的PP/CNTs与未接枝的PP/CNTs及PP相比，其结晶温度分别提高了2.6和12.0 ℃，热分解温度T5%分别提高了6.4和34.8 ℃，其拉伸强度和拉伸模量略有提高，冲击强度分别提高了56.7%和58.1%。

关键词: 聚丙烯, 碳纳米管, 纳米复合材料, 自由基接枝

Abstract: We report a facile melt radical grafting reaction method to fabricate covalent grafted polypropylene(PP)/carbon nanotubes(CNTs) nanocomposites using 2,5-dimethyl-2,5(tert-butylperoxy) hexane peroxide(DHBP) to induce the radical and using tetramethylthiuram(TMTD) to control radical grafting reaction. The covalent grafting reaction was characterized by Raman spectroscopy and TEM. The crystallization, thermal and mechanical properties of the composites were studied. Compared with noncovalent grafted PP/CNTs composites and PP, the covalent grafted nanocomposites showed increased crystallization temperatures(2.6 and 12.0 ℃, respectively) and thermal decomposition temperatures(6.4 and 34.8 ℃, respectively), an increased tensile strength and tensile modulus to a little extent, and increased notched impact strength by 56.7% and 58.1%, respectively.

Key words: Polypropylene, Carbon nanotubes, Nanocomposites, Radical grafting

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