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  

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

作　　者：赵全 曾虹燕[1] 杨晨光[2] 邢哲[2] 王谋华[2] 吴国忠[2] Zhao Quan;Zeng Hongyan;Yang Chenguang;Xing Zhe;Wang Mouhua;Wu Guozhong(College of Chemical Engineering,Xiangtan University,Xiangtan 411105;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800)

机构地区：[1]湘潭大学化工学院,湘潭411105 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《化工新型材料》2019年第2期166-170,共5页New Chemical Materials

基　　金：国家自然科学基金(11079048)

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(scCO_2)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1.3×10~7个/cm^3提高至1.1×10~8个/cm^3。经过共混和辐照处理的PP发泡温度窗口变宽。Polypropylene(PP)/nano-clay(ISIC)blend samples were prepared by melt mixing,followed byγ-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 of30kGy.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 1.1×10^8 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 

分 类 号：TQ328.0[化学工程—合成树脂塑料工业]