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中文摘要：
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（[C12MIM][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.
英文摘要：
A series of compatible blends of poly（methyl methacrylate） with an ionic liquid（IL）,1-dodecyl-3-methylimidazolium hexafluorophosphate[C12MIM] [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.
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