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Thermal conductive performance of organosoluble polyimide/BN and polyimide/(BN + ALN) composite films fabricated by a solution‐cast method
Author(s) -
Kuo D.H.,
Lin C.Y.,
Jhou Y.C.,
Cheng J.Y.,
Liou G.S.
Publication year - 2013
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22396
Subject(s) - polyimide , materials science , composite number , composite material , electrical conductor , thermal conductivity , ceramic , thermal , porosity , volume (thermodynamics) , layer (electronics) , physics , quantum mechanics , meteorology
Organosoluble polyimide (PI)/ceramic composite films with different BN or (BN + AlN) contents were under investigation for their thermal conductive performances. The chosen polyimide constituted by 4,4′‐oxydiphthalic dianhydride/2,2‐bis(3‐amino‐4‐hydroxyphenyl)hexafluor opropane could be dissolved and cast into thin films at room temperature. The commercially available BN and AlN fillers up to a volume ratio of 0.6 were added to the polyimide and their thermal conductive performances were measured. BN powders needed a surface precoating treatment to avoid sedimentation. The dense and flexible PI/BN composite films, after a drying treatment at 200°C, showed high thermal conductivity of 2.3 W/m·K −1 at a BN volume ratio of 0.6, as compared with 0.13 W/m·K −1 for pristine polyimide. However, in the case of PI/(BN + AlN) composite films, thermal conductive performance degraded because the films became highly porous at the higher AlN content. POLYM. COMPOS., 2013. © 2013 Society of Plastics Engineers