聚丙烯
材料科学
复合材料
泡沫混凝土
隔音
发泡剂
艾氏冲击强度试验
造型(装饰)
保温
发泡剂
极限抗拉强度
聚氨酯
多孔性
图层(电子)
水泥
作者
Fangjun Liu,Chenxi Shen,Feng You,Wufan Zhao,Chunming Deng,Xueliang Jiang
标识
DOI:10.1002/marc.202300344
摘要
High-performance polypropylene (PP) foam is a vital polymer product in industrial areas. However, the poor melt strength of ordinary PP homopolymer limits its foaming molding. In this work, high melt strength polypropylene (HMSPP) is prepared by using styrene (St) and tripropylene glycol diacrylate (TPGDA) as comonomers, and then PP foams are prepared by mold foaming method. The results show that adding St in the grafting process of TPGDA will obviously improve the melt strength of the PP matrix, and its melt strength (28 184 Pa.s) is 7.4 times higher than that of pure PP. HMSPP foam has more regular and uniform cells and higher cell density, which significantly improves the sound and thermal insulation properties of PP foam. Compared with pure PP foam, the average sound transmission loss (52.9 dB) of HMSPP foam with a low foaming ratio increased by 64%, and the thermal conductivity (0.0867 W mK-1 ) decreased by 46%. Therefore, the obtained HMSPP foam can be used in sound insulation or thermal insulation area. This work provides an available route for the high-performance utilization of PP foam.
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