化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (2) : 166-170.

科学研究

辐射改性聚丙烯/纳米伊蒙土共混材料的超临界二氧化碳发泡性能研究

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作者信息 +

Foaming of radiation modified PP/ISIC composite by supercritical carbon dioxide

Zhao Quan^1,2, Zeng Hongyan¹, Yang Chenguang², Xing Zhe², Wang Mouhua², Wu Guozhong²

Author information +

文章历史 +

Received
2017-09-20
Issue Date	Revised Date
2019-03-18	2017-09-20

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摘要

用聚丙烯(PP)与纳米伊蒙土(ISIC)熔融共混制备片材,采用γ射线辐照PP/ISIC共混片材,并利用超临界二氧化碳(scCO₂)发泡技术对其进行发泡。研究了吸收剂量、ISIC添加量和发泡温度对泡孔结构的影响。结果表明,吸收剂量为30kGy时,PP/ISIC样品泡沫具有较好的泡孔结构,且随着ISIC含量增加,发泡材料孔径减小,孔密度增大。加入3%(wt,质量分数)的ISIC后,发泡样品的平均孔径从57μm减少到25μm,泡孔密度从1.3×10⁷个／cm³提高至1.1×10⁸个／cm³。经过共混和辐照处理的PP发泡温度窗口变宽。

Abstract

Polypropylene(PP)/nano-clay (ISIC) blend samples were prepared by melt mixing,followed by γ-ray irradiation.Batch foaming of irradiated PP/ISIC samples by using supercritical carbon dioxide (scCO₂) was investigated in detail.The effects of absorbed doses,nano-clay content and foaming temperature on the morphology of PP/ISIC foam were also investigated.The results indicated that the PP/ISIC foam had a well-defined cellular structure at a dose of 30kGy.Smaller cell size and higher cell density were obtained at high nano-clay content.The average cell size of PP/ISIC foam was reduced to 25μm,and the cell density reached 1.1×10⁸ cell/cm³ at anano-clay content of 3wt%.After the addition of nano-clay and irradiation,the foaming temperature window of PP increased from 4℃ to 10℃ as compared to the virgin PP.

关键词

聚丙烯 / 辐射改性 / 纳米伊蒙土 / 超临界CO₂ / 发泡

Key words

polypropylene(PP) / radiation modification / nano-clay (ISIC) / supercritical carbon dioxide / foaming

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辐射改性聚丙烯/纳米伊蒙土共混材料的超临界二氧化碳发泡性能研究[J]. 化工新型材料, 2019, 47(2): 166-170 DOI:

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