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Effect of Al 2 O 3 fibers on the thermal conductivity and mechanical properties of high density polyethylene with the absence and presence of compatibilizer
Author(s) -
Zhang Shuai,
Ke Yucai,
Cao Xinyu,
Ma Yongmei,
Wang Fosong
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.35579
Subject(s) - high density polyethylene , materials science , composite material , polyethylene , composite number , maleic anhydride , melt flow index , thermal conductivity , compression molding , fiber , anisotropy , molding (decorative) , polymer chemistry , polymer , copolymer , mold , physics , quantum mechanics
Alumina (Al 2 O 3 ) fiber/high density polyethylene (HDPE) composites were prepared by molding injection with or without compatibilizer, in which, maleic anhydride‐grafted polyethylene (PE‐ g ‐MA) and acrylic acid‐grafted polyethylene (PE‐ g ‐AA) were used as the compatibilizers. The thermal conductivities of the composites were anisotropic and the conductivities in the injection direction of the samples were higher than those in perpendicular direction of the injection. The anisotropic thermal conductivity for Al 2 O 3 /PE‐ g ‐AA/HDPE was the most obvious and this composite also gave the best mechanical performance. The SEM and DMA test revealed that PE‐ g ‐AA was more effective than PE‐ g ‐MA in improving the matrix–filler interaction. The high interfacial interaction was more favorable for the viscous flow‐induced fiber orientation, which resulted in the largest anisotropic degree of thermal conductivity of the Al 2 O 3 /PE‐ g ‐AA/HDPE among the studied composite. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011