Preparation and properties of fluorine-containing colorless polyimide nanocomposite films with organo-modified montmorillonites for potential flexible substrate.
We prepared transparent polyimide (PI) and organo-modified montmorillonite (OMMT) nanocomposite films from the solution of poly(amic acid) and various amounts (0.5-2 wt%) of OMMT in N,N-dimethylacetamide (DMAc). The Poly(amic acid) was prepared from the reaction of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and 2,2'-bis (trifluoromethyl)-4,4'-diamino phenyl (TFDB). Dodecylamine (C12-) and dodecyltriphenylphosphonium chloride (C12PPh-Cl-) were used as organic modifiers in OMMT. The PI/OMMT nanocomposite films were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscope (TEM), UV-Vis transmission spectra, thermomechanical analysis (TMA), and rheometric dynamic analysis (RDA). As the OMMT contents is increased, PI/OMMT nanocomposites generally show better properties compared to pristine PI films, although the transparency of the PI/OMMT nanocomposite films is sacrificed slightly. However, it is concluded that these nanocomposite films are good candidates for potential flexible substrates.
Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea.
Jin-Ho
JH
Park
Jin-Hoe
JH
Kim
Jin-Woo
JW
Park
Jin-Hae
JH
Chang
Chang-Sik
CS
Ha
D001546:Bentonite / Q000737:chemistry*; D003116:Color; D003460:Crystallization / Q000379:methods*; D004548:Elasticity; D005461:Fluorine / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D009930:Organic Chemicals / Q000737:chemistry*; D010316:Particle Size; D012117:Resins, Synthetic / Q000737:chemistry*; D013499:Surface Properties
D046911:Macromolecular Substances; D008567:Membranes, Artificial; D009930:Organic Chemicals; D012117:Resins, Synthetic; D001546:Bentonite; D005461:Fluorine; C029945:polyimide resin