Health & Environmental Research Online (HERO)


Print Feedback Export to File
7002779 
Journal Article 
High thermal conductivity and low absorptivity/ emissivity properties of transparent fluorinated polyimide films 
Xiao, T; Fan, X; Fan, D; Li, Q; , 
2017 
1 
Polymer Bulletin
ISSN: 0170-0839
EISSN: 1436-2449 
SPRINGER 
NEW YORK 
4561-4575 
WOS:000410445900014 
Polyimide film materials are a very promising and high-performance polymer in space application. However, the deep coloration of conventional polyimide films greatly limits the wide use in areas where transparency and low solar absorptance are the essential requirement. Here, we prepared the transparent polyimide from 4,4-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) and different ratios of 2,2-bis(trifluoromethyl)-benzidine (TFB) and 2,2-bis(4-(4-aminophenoxy)-phenyl) hexafluoropropane (BAPP) with a low solar absorptance. Properties, such glass-transition temperature, thermal decomposition temperature, thermal conductivity and transmittance, were investigated, It is suggested that the introduction of fluorine into polyimide will significantly increase transmittance and in turn decrease solar absorptance, The polyimide film with fluorinated groups exhibited superior optical transparency, low absorptivity/emissivity, high thermal conductivity, and good resistance to ultraviolet radiation. The transparent polyimide exhibits a low solar absorptivity of 0.04 and infrared emissivity of 0.6.