高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (01): 172.doi: 10.3969/j.issn.0251-0790.2012.01.029

• 高分子化学 • 上一篇    下一篇

相容的聚甲基丙烯酸甲酯/[C12 MIM][PF6]离子液体体系在超临界CO2中的发泡性能

仝芳芳1, 徐鸿2, 余坚2, 文利雄1, 张军2, 何嘉松2   

  1. 1. 北京化工大学有机无机复合材料国家重点实验室, 北京 100029;
    2. 中国科学院化学研究所, 高分子科学与材料联合实验室, 工程塑料重点实验室, 北京分子科学国家实验室, 北京 100190
  • 收稿日期:2011-04-06 出版日期:2012-01-10 发布日期:2011-12-20
  • 通讯作者: 余坚,男,博士,副研究员,主要从事高分子材料结构与性能研究.E-mail:yuj@iccas.ac.cn;文利雄,男,博士,教授,主要从事过程强化与纳米材料研究.E-mail:wenlx@mail.buct.edu.cn E-mail:yuj@iccas.ac.cn; wenlx@mail.buct.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 50873113, 20821004)资助.

Foaming Behavior of Compatible PMMA/[C12 MIM][PF6] System by Supercritical CO2

TONG Fang-Fang1, XU Hong2, YU Jian2, WEN Li-Xiong1, ZHANG Jun2, HE Jia-Song2   

  1. 1. State Key Lab of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
    2. Beijing National Laboratory for Molecular Science(BNLMS), Key Laboratory of Engineering Plastics, Joint Laboratory of Polymer Science and Materials, Institute of Chemistry, Chinese Academy of Science, Beijing 100190, China
  • Received:2011-04-06 Online:2012-01-10 Published:2011-12-20
  • Contact: Jian Yu E-mail:yuj@iccas.ac.cn; wenlx@mail.buct.edu.cn

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摘要： 通过快速卸压法, 以超临界CO2为物理发泡剂, 研究了相容的聚甲基丙烯酸甲酯(PMMA)/1-n-十二烷基-3-甲基咪唑六氟磷酸盐([C12 MIM][PF6])离子液体(IL)复合体系的发泡性能. 加入IL后, PMMA对CO2的吸收量增加; 复合体系的玻璃化转变温度(Tg)随IL含量的增加而降低. IL对PMMA发泡行为的影响取决于发泡条件. 在较低温度和压力下, 纯PMMA无法发泡, IL的加入可促进泡孔形成; 提高温度和压力, 纯PMMA可以发泡, IL的加入在提高泡孔尺寸的同时使泡孔仍然保持尺寸分布均匀的微米级结构.

关键词: [C12 MIM][PF6]离子液体, 聚甲基丙烯酸甲酯, 超临界CO2, 发泡性能

Abstract: A series of compatible blends of poly(methyl methacrylate) with an ionic liquid(IL), 1-dodecyl-3-methylimidazolium hexafluorophosphate[C12 MIM][PF6], was prepared by melt blending. The blends were foamed with supercritical CO2 as the blowing agent via a rapid pressure-quenching process. By adding IL, the CO2 absorption of PMMA was increased, and the glass transition temperature was lowered. The effects of IL on the foaming behavior of PMMA depended on foaming conditions. When the foaming temperature and pressure were low, pure PMMA could not be foamed, while the addition of IL facilitated the formation of cells. On the other hand, pure PMMA could be foamed at higher temperatures and pressures, and adding IL further increased the cell size of the foamed samples; however, the cell size was still within the micron-meter scale and had a narrow distribution.

Key words: [C12 MIM][PF6]ionic liquid, Poly(methyl methacrylate)(PMMA), Supercritical carbon dioxide, Foaming behavior

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