中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (10): 1130-1134.DOI: 10.3724/SP.J.1095.2011.00648

• 研究论文 • 上一篇    下一篇

二硫化四甲基秋兰姆在热引发熔融接枝聚丙烯体系中的调控作用

张振江1,2,万东1,2,邢海平1,2,唐涛1*   

  1. (1.高分子物理与化学国家重点实验室，中国科学院长春应用化学研究所 长春 130022；2.中国科学院研究生院 北京)
  • 收稿日期:2010-11-01 修回日期:2010-12-28 出版日期:2011-10-10 发布日期:2011-10-10
  • 通讯作者: 唐涛，研究员; Tel:0431-85262004; 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:
    国家自然科学基金(50921062,50873099和20804045)资助项目

The Effect of Tetramethylthiuram Disulfide on the Heat-induction Melt-grafting of Polypropylene

ZHANG Zhenjiang1,2, WAN Dong1,2, XING Haiping1,2, TANG Tao1*   

  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 the Chinese Academy of Sciences,Beijing)
  • Received:2010-11-01 Revised:2010-12-28 Published:2011-10-10 Online:2011-10-10

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1311

被引次数

4 | 5

摘要：

以未添加助剂的聚丙烯（PP）粉料为原料，三羟甲基丙烷三丙烯酸酯（TMPTA）为接枝单体，采用热引发熔融接枝的方法制备长链支化聚丙烯（LCBPP）。 当支链分子量大于PP的临界分子量（Me=5 600）的2倍时，对流变性能有很大的影响，称为流变学长支链。 研究了二硫化四甲基秋兰姆（TMTD）在熔融接枝体系中的调控作用。 研究结果表明，加入TMTD后，单体的接枝量降低，但是支化效率提高。 理论计算表明，在同样条件下加入TMTD后，改性样品的长支链频率由0.03升至0.34。

关键词: 聚丙烯, 熔融接枝, 长链支化

Abstract:

Trimethylol propane triacrylate(TMPTA) and polypropylene(PP) powder without any additives were used to prepare long chain branched polypropylene by in situ heat-induction melt-grafting. The long chain branches of PP with molecular mass over twice the molecular mass between successive entanglements(＞2Me) have dramatic effect on the rheological properties. The effect of tetramethylthiuram disulfide(TMTD) on the heat-induction melt-grafting was studied. It was found that the grafting degree of TMPTA decreased but the branching efficiency increased when TMTD was added to the system. According to the result of theoretic calculation, the branching frequency increased from 0.03 to 0.34 when TMTD was employed under the same conditions.

Key words: Polypropylene, melt grafting, long chain branched

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