期刊
JOURNAL OF CELLULAR PLASTICS
卷 51, 期 4, 页码 387-400出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021955X14544199
关键词
Polyetherimide; polypropylene-graft-maleic anhydride blends; foaming behavior; microcellular injection molding; binary interface
资金
- Science and Technology Development Foundation of China Academy of Engineering Physics [2013B0302041]
In this study, foaming behaviors of polyetherimide (PEI)/polypropylene-graft-maleic anhydride (PPMA) blends with different fractions of PPMA are investigated by the microcellular injection molding (Mucell) using N-2 as the blowing gas. The results indicate that the addition of PPMA can obtain more the interface in blends than PP. Meanwhile, the microcellular PEI/PPMA foams achieve higher void fraction and cell density than that of PEI/PP and neat PEI matrix, and then the cell diameter also significantly decreases from 30 mu m to less 10 mu m. The excellent cell properties can be attributed to interfacial effect of binary blends. The binary interface decreases the nucleation energy barrier and forms sufficient paths which improve diffusibility of blowing gas, so the microcellular PEI/PPMA foams obtain more nucleating points and paths of supporting cell growth.
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