含小分子发泡剂的硬质聚氨酯泡沫塑料性能老化研究  

Study on aging properties of rigid polyurethane foam with small molecule blowing agent

作　　者：王诗文 范才全 王永帅 张向平 叶俊 朱霞林 WANG Shiwen;FAN Caiquan;WANG Yongshuai;ZHANG Xiangping;YE Jun;ZHU Xialin(Hisense Refrigerator Co.,Ltd.Qingdao 266100;Wanhua Chemical(Ningbo)Rongwei Polyurethane Co.,Ltd.Ningbo 315812)

机构地区：[1]海信冰箱有限公司,山东青岛266100 [2]万华化学(宁波)容威聚氨酯有限公司,浙江宁波315812

出　　处：《家电科技》2023年第S01期166-173,共8页Journal of Appliance Science & Technology

摘　　要：在环戊烷(CP)和HFC-245fa混合多元发泡体系中添加不同比例正丁烷(HC-R600),研究在模具中制备的聚酯硬质泡沫性能变化和在两种不同老化条件下泡沫的导热系数和压缩强度随老化条件和时间的变化规律,并用导热系数变化规律与实际箱体的导热系数变化对比。研究表明,增加发泡剂R600后,泡沫流动性提升,导热系数上升,强度性能则保持稳定。在不同老化过程中,导热系数变化结果相近;压缩强度变化不一致,但存在加速关系。实际箱体导热系数变化明显小于相同老化周期内模具发泡的变化。After adding different proportions of n-butane(HC-R600)to the mixed component foaming system of cyclopentane(CP)and HFC-245fa,the performance changes of rigid polyurethane foams prepared in a mold and the variation laws of thermal conductivity(k-factor)and compressive strength under two different aging conditions with different aging time were studied.Then compare the above variations of k-factor with the changes under the natural aging in a refrigerator.The research showed that the fluidity was improved and the k-factor increased with the increasing contents of blowing agent R600,while the compressive strength remained stable.During different aging processes,the results of k-factor were similar,and the changes in compressive strength were inconsistent,but there were acceleration relationship between them.The changes in k-factor of the refrigerator were significantly less than the changes in mold foams within the same aging time under different aging conditions.

关 键 词：低沸点小分子 R600 聚氨酯泡沫塑料 发泡剂 泡沫性能 老化性能 

分 类 号：TB3[一般工业技术—材料科学与工程]