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.
Park
Jin-Ho
JH
Department of Polymer Science and Engineering, Pusan National University, Busan 609-735, Korea.
Kim
Jin-Hoe
JH
Park
Jin-Woo
JW
Chang
Jin-Hae
JH
Ha
Chang-Sik
CS
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