无氯氟化学发泡剂对深冷保温用硬质聚氨酯泡沫导热性能影响  

Effects of Non-chlorine and Non-fluorine Chemical Foaming Agent on Thermal Conductivity of Rigid Polyurethane Foam for Cryogenic Insulation

作　　者：王洪庆 余美丹 毕玉遂[1] 毕戈华[1] 黄骏峰 张录斌 王娟 Wang Hongqing;Yu Meidan;Bi Yusui;Bi Gehua;Huang Junfeng;Zhang Lubin;Wang Juan(School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255049,China;Butian New Materials Technology Co.,Ltd.,Zibo 255000,China;Zaozhuang JFE Zhenxing Chemical Co.,Ltd.,Zaozhuang 277000,China)

机构地区：[1]山东理工大学化学化工学院,山东淄博255049 [2]补天新材料技术有限公司,山东淄博255000 [3]枣庄杰富意振兴化工有限公司,山东枣庄277000

出　　处：《工程塑料应用》2021年第2期136-140,共5页Engineering Plastics Application

摘　　要：无氯氟化学发泡剂CFA8125可与异氰酸酯反应放出CO_(2)气体,用于硬质聚氨酯发泡,分别使用无氯氟化学发泡剂CFA8125、第三代物理发泡剂HFC–245fa和第四代物理发泡剂LBA制备硬质聚氨酯泡沫,并对其性能进行了研究。结果表明,所得硬质聚氨酯泡沫的密度为43 kg/m^(3)左右时,使用化学发泡剂的硬质聚氨酯泡沫在长、宽、高方向上的压缩强度分别为257,228,280 KPa,均高于使用物理发泡剂的泡沫,具有良好的压缩强度。使用化学发泡剂的硬质聚氨酯泡沫在–160℃时的热导率为10.10 mW/(m·K),较使用物理发泡剂的硬质聚氨酯泡沫低20%左右,更具保温效果,且–196℃下的尺寸稳定性优良,符合使用标准,可适用于深冷环境保温。Chlorine-free and fluorine-free chemical blowing agent CFA8125 can react with isocyanate to release CO_(2)gas for rigid polyurethane foaming.Use chlorine-free and fluorine-free chemical blowing agent CFA8125,third-generation physical blowing agent HFC–245fa and fourth-generation physical blowing agent LBA respectively were used to prepare rigid polyurethane foam and its performance were studied.The results show that when the density of rigid polyurethane foam is about 43 kg/m^(3),the compressive strength of rigid polyurethane foam with chemical foaming agent in the direction of length,width and height are 257,228,280 kPa respectively,which is higher than that of physical foaming agent,and has good compressive strength.The thermal conductivity of rigid polyurethane foam with chemical foaming agent is 10.10 mW/(m·K)at–160℃,which is about 20%lower than that of rigid polyurethane foam using physical foaming agent,and has better thermal insulation effect,and the dimensional stability is excellent at–196℃.It meets the standards of application and can be applied to heat preservation in cryogenic environment.

关 键 词：化学发泡剂 物理发泡剂 硬质聚氨酯泡沫 热导率 保温 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]