高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

预辐射聚丙烯反应挤出接枝丙烯酸的研究

蔡传伦1,2, 辛志荣3, 姚占海1, 石强1,2, 殷敬华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 100039;
    3. 烟台大学化学生物理工学院, 烟台 264005
  • 收稿日期:2006-03-09 修回日期:1900-01-01 出版日期:2006-10-10 发布日期:2006-10-10
  • 通讯作者: 殷敬华

Grafting Acrylic Acid onto Pre-irradiated Polypropylene by Reactive Extrusion

CAI Chuan-Lun1,2, XIN Zhi-Rong3, YAO Zhan-Hai1, SHI Qiang1,2, YIN Jing-Hua1   

    1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;
    3. College of Biology & Chemistry, Yantai University, Yantai 264005, China
  • Received:2006-03-09 Revised:1900-01-01 Online:2006-10-10 Published:2006-10-10
  • Contact: YIN Jing-Hua

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被引次数

41

摘要：

利用电子束(EB)预辐照方法和反应挤出技术制备了聚丙烯接枝丙烯酸共聚物PP-g-AA. 采用化学滴定、红外光谱、偏光显微镜(PLM)、DSC和广角X射线衍射(WAXD)对接枝产物进行了表征. 研究结果表明, 接枝率随辐照剂量增加而增大并逐渐达到平台值, 但随单体浓度增大而表现为线性增加, 接枝链能起到异相成核作用, 从而提高了结晶速率并细化了球晶. 同时, 熔体流动速率(MFR)和力学性能测试结果表明, 预辐射和挤出过程造成了PP严重降解, 据此可认为接枝反应主要发生在聚丙烯断裂分子链的末端.

关键词: 聚丙烯, 反应挤出, 电子束预辐照, 丙烯酸

Abstract:

Polypropylene functionalized with acrylic acid(PP-g-AA) was prepared by coupling electron beam(EB) pre-irradiation treatment with reactive extrusion process. The grafting samples were characterized by chemical titration, FTIR, polarized light microphotographs, DSC and WAXD. The study showed that grafting degree(Gd) increased with increasing irradiation dose and then leveled off; the Gd increased linearly with the AA concentration rising. It was observed that crystallization temperature of the grafted sample increased and crystallite size decreased, which can be attributed to the heterogeneous nucleating action of grafting chain. The MFR and mechanical properties measurements proved that serious degradation of PP occured in the stage of pre-irradiation and extruding process. Meanwhile, a mechanism of grafting reactions was proposed tentatively.

Key words: Polypropylene, Reactive extrusion, Electron beam pre-irradiation, Acrylic acid

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