Please use this identifier to cite or link to this item:
|Title:||Thermal imidization of poly(pyromellitic dianhydride-4, 4′-oxydianiline) precursors on fluoropolymers modified by surface graft-copolymerization with glycidyl methacrylate|
|Citation:||Yang, G.H., Zhang, Y., Lee, K.S., Kang, E.T., Neoh, K.G. (2003-02-01). Thermal imidization of poly(pyromellitic dianhydride-4, 4′-oxydianiline) precursors on fluoropolymers modified by surface graft-copolymerization with glycidyl methacrylate. Journal of Fluorine Chemistry 119 (2) : 151-160. ScholarBank@NUS Repository.|
|Abstract:||Composite films of polyimide (PI) and poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) or of PI and Poly(tetrafluoroethylene) (PTFE) were prepared by thermal imidization of the poly(amic acid) (PAA) precursors of poly(pyromellitic dianhydrite-4,4′-oxydianiline) (PMPA-ODA) on glycidyl methacrylate (GMA) graft-copolymerized FEP and PTFE films. The resulting PI/GMA-g-FEP and PI/GMA-g-PTFE composites exhibited T-peel adhesion strength of approximately 7.0 and 6.5 N/cm, respectively, compared to negligible adhesion strength for the laminates prepared from thermal imidization of the PAA on the pristine and the Ar plasma-treated FEP and PTFE films. X-ray photoelectron spectroscopy (XPS) results revealed that both the PI/GMA-g-FEP and PI/FEP-g-PTFE composite films delaminated by cohesive failure inside the FEP and PTFE films, respectively. The so-delaminated PI films with a covalently tethered FEP or PTFE surface layer were highly hydrophobic, having static water contact angles above 140°C. The highly hydrophobic property depends on both the composition and roughness of the delaminated surface. © 2002 Elsevier Science B.V. All rights reserved.|
|Source Title:||Journal of Fluorine Chemistry|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 8, 2018
WEB OF SCIENCETM
checked on Dec 19, 2018
checked on Nov 16, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.