Back Cover, Volume 131, Issue 5



Compatibilizers are often used in polymer blends to decrease their interfacial tension and increase their interfacial area. The modification of interfacial properties subsequently affects the foaming behavior: the bubble nucleation sites increase due to the large interfacial area, while the bubble nucleation energy increases due to the small interfacial tension. In this work, Pengjian Gong and Masahiro Ohshima prepare polypropylene/poly(methyl methacrylate) (PMMA/PC) blends by reactive blending and then apply CO2 foaming. The image shows the PMMA/PC (90/10 ratio) blends with the compatibilizer, which have a large cell density. However, the nucleation ability of the interface is low. As a result, the competitive effect of the compatibilizer on the bubble nucleation is investigated. (DOI: 10.1002/app.39228)