| 辐射改性LDPE/EVA共混物及其超临界CO2发泡行为的研究 |
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| 引用本文： | 王波,吴国忠,王谋华,曾虹燕,邢哲. 辐射改性LDPE/EVA共混物及其超临界CO2发泡行为的研究[J]. 辐射研究与辐射工艺学报, 2010, 28(4): 220-224 |
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| 作者姓名： | 王波 吴国忠 王谋华 曾虹燕 邢哲 |
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| 作者单位： | 湘潭大学化工学院,湘潭,411105;中国科学院上海应用物理研究所,上海,201800;中国科学院上海应用物理研究所,上海,201800;湘潭大学化工学院,湘潭,411105 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目 |
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| 摘 要： | 用60Coγ射线辐照改性LDPE/EVA共混物,并利用超临界CO2发泡技术制得了微孔LDPE/EVA共混物泡沫。用差示扫描量热仪(DSC)、高级流变扩展系统(ARES)和扫描电镜(SEM)分别对交联LDPE/EVA共混物的熔点、结晶度、粘度以及泡沫的微孔形貌进行了表征。结果表明,辐照处理以后,LDPE/EVA共混物样品的熔点和结晶度略有降低,粘度特性得到改善,可发泡性能提高。共混物吸收剂量为50kGy时,经超临界CO2发泡在105℃和23MPa下制得的泡沫具有较好的泡孔结构。
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| 关 键 词： | LDPE/EVA共混物 超临界二氧化碳 γ射线 微孔材料 |
Radiation modified LDPE/EVA blend and its foamiability using supercritical carbon dioxide |
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| WANG Bo,WU Guozhong,WANG Mouhua,ZENG Hongyan,XING Zhe. Radiation modified LDPE/EVA blend and its foamiability using supercritical carbon dioxide[J]. Journal of Radiation Research and Radiation Processing, 2010, 28(4): 220-224 |
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| Authors: | WANG Bo WU Guozhong WANG Mouhua ZENG Hongyan XING Zhe |
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| Affiliation: | (School of Chemical Engineering,Xiangtan University,Xiangtan 411105,China) 2 (Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China) |
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| Abstract: | LDPE/EVA blend were modified by γ-irradiation,and then foamed by using supercritical carbon dioxide as blowing agent. The effect of absorbed dose on melting temperature,crystallization and shearing viscosity of LDPE/EVA blend was characterized by means of differential scanning calorimeter （DSC） and advanced rheology expand system （ARES）.The morphology of the foam was investigated in detail by scanning electron microscopy （SEM）. Experimental results showed that the melting point and the crystallinity of LDPE/EVA blend slightly decreased after γ-irradiation. However,the viscosity and foaming property of the blend were improved than the original blend. At foaming temperature of 105℃ with the saturation pressure of 23 MPa,the optimal absorbed dose for the foaming of the blend was found to be 50 kGy. |
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| Keywords: | LDPE/EVA blend Supercritical carbon dioxide γ-rays Microcellular foam |
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