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|Title:||Surface modification of polytetrafluoroethylene films via graft copolymerization for auto-adhesion|
|Authors:||Kang, E.T. |
|Source:||Kang, E.T.,Shi, J.L.,Neoh, K.G.,Tan, K.L.,Liaw, D.J. (1998-12). Surface modification of polytetrafluoroethylene films via graft copolymerization for auto-adhesion. Journal of Polymer Science, Part A: Polymer Chemistry 36 (17) : 3107-3114. ScholarBank@NUS Repository.|
|Abstract:||The surfaces of Ar plasma-pretreated polytetrafluoroethylene (PTFE) films are further functionalized via UV-induced graft copolymerization with amphoteric N,.N′-dimethyl(methacryloylethyl)ammonium propansulfonate (DMAPS) either in Ar atmosphere, or under atmospheric conditions and in the absence of a polymerization initiator. The so-modified PTFE films from either process are capable of exhibiting adhesive-free adhesion or auto-adhesion with one another when brought into intimate contact in the presence of a small quantity of water. The lap shear adhesion strength increases with increasing graft concentration and can readily exceed the yield strength of the PTFE substrate. Two plasma-pretreated PTFE films also readily undergo thermal graft copolymerization with concurrent lamination when lapped together in the presence of a small quantity of the DMAPS monomer solution at elevated temperature in the atmosphere. The surface compositions of the graft-copolymerized PTFE films and the delaminated surfaces were characterized by X-ray photoelectron spectroscopy (XPS). In most cases, adhesional failure occurred near the graft-substrate interphase. © 1998 John Wiley & Sons, Inc.|
|Source Title:||Journal of Polymer Science, Part A: Polymer Chemistry|
|Appears in Collections:||Staff Publications|
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