Hu Zhi-zhi
2010
Citations
0
Influential Citations
0
Citations
Journal
Insulating Materials
Abstract
2,2-bis[4-(4-nitro-2-trifluoromethylphenoxy)phenyl]sulfone(I) was synthesized through nucleophilic substitution reaction of 2-chloro-5-nitrobenzotrifluoride and 2,2-sulfonyl diphenol in the presence of potassium carbonate.Then,a diamine monomer,2,2-bis[4-(4-amino-2-trifluoromethyl-phenoxy)phenyl]sulfone(II) was obtained through catalytic reduction with hydrazine and Pd/C.Four kinds of fluorinated polyimide(PI) were synthesized from the diamine II and various dianhydrides,such as pyromellitic dianhydride(PMDA),3,3',4,4'-biphenyltetracarboxylic acid dianhydride(BPDA),3,3',4,4'-oxydiphthalic anhydride(ODPA) and 3,3',4,4'-benzophenonetetracarboxylicdianhydride(BTDA),respectively,via thermal imidization of poly(amic acid).The experimental results showthat these PI films exhibit excellent optical transmittance in the visible region and solubility in polar organic solvent.The PI derived from ODPA showes best optical transparency with a transmittance higher than 85.4% at 450 nm.