| Preparation of PMMA Foam by Supercritical CO_2 with Ethanol |
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| 作者姓名： | Zhi Min LIU GuanYing YANG Dan LI Bu Xing HAN* Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing |
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| 作者单位： | Zhi Min LIU，GuanYing YANG，Dan LI，Bu Xing HAN* Center for Molecular Science，Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080 |
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| 基金项目： | the National Natural Science Foundation of China for financial support (29725308, 29633020). |
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| 摘 要： | Supercritical (SC) CO2 can plasticize many amorphous polymers, which reduce the glass transition temperature of the polymers significantly. Recently, it was used as blowing agent to foam amorphous materials such as poly(methyl methacrylate) (PMMA)1,2, polystyrene (PS)3, polycarbonate (PC)4 and poly(ethylene terephthalate) (PET)4. In this foaming process, a polymer is saturated with SC CO2, and followed by rapid depressurization to atmospheric pressure. The microcellular foams can be ob…
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Preparation of PMMA Foam by Supercritical CO_2 with Ethanol |
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| Zhi Min LIU,GuanYing YANG,Dan LI,Bu Xing HAN* Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing .Preparation of PMMA Foam by Supercritical CO_2 with Ethanol[J].Chinese Chemical Letters,2001(2). |
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| Authors: | Zhi Min LIU GuanYing YANG Dan LI Bu Xing HAN Center for Molecular Science |
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| Institution: | Zhi Min LIU,GuanYing YANG,Dan LI,Bu Xing HAN* Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080 |
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| Abstract: | Supercritical CO_2 with ethanol as blowing agent foamed poly(methylmethacrylate) (PMMA) fiber at 308.15K and in the pressure range from 12-15MPa. The foam structure was detected using scanning electron microscope. It was found that the concentration of ethanol in the fluid is a major parameter to affect the foam structure. |
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| Keywords: | PMMA Foam CO_2 |
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