Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/67567
Title: Surface modification of polytetrafluoroethylene films via graft copolymerization for auto-adhesion
Authors: Kang, E.T. 
Shi, J.L.
Neoh, K.G. 
Tan, K.L. 
Liaw, D.J.
Keywords: Amphoteric monomer
Ar plasma
Auto-adhesion
PTFE
Surface grafting
XPS
Issue Date: Dec-1998
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
URI: http://scholarbank.nus.edu.sg/handle/10635/67567
ISSN: 0887624X
Appears in Collections:Staff Publications

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