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Surface modification of polymers for adhesion enhancement
Author(s) -
Kang E. T.,
Neoh K. G.,
Shi J. L.,
Tan K. L.,
Liaw D. J.
Publication year - 1999
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199901/02)10:1/2<20::aid-pat761>3.0.co;2-c
Subject(s) - glycidyl methacrylate , materials science , low density polyethylene , copolymer , adhesive , contact angle , polymer chemistry , methacrylate , acrylic acid , surface modification , adhesion , monomer , x ray photoelectron spectroscopy , curing (chemistry) , chemical engineering , polyethylene , polymer , composite material , layer (electronics) , engineering
Surface modification of low‐density polyethylene (LDPE) and polytetrafluoroethylene (PTFE) films via graft copolymerization with acrylic acid (AAc), Na salt of styrenesulfonic acid (NaSS), N,N‐dimethylacrylamide (DMAA), 2‐(dimethylamino)ethyl methacrylate (DMAEMA), glycidyl methacrylate (GMA), acrylamide (AAm) and 3‐dimethyl(methacryloylethyl) ammonium propanesulfonate (DMAPS) was carried out for adhesion improvements. The surface microstructure and composition of the modified film surfaces were studied by angle‐resolved X‐ray photoelectron spectroscopy (XPS). It was demonstrated that the graft‐modified LDPE and PTFE films are capable of exhibiting adhesive‐free adhesion or auto‐adhesion. The GMA graft copolymerized PTFE surfaces adhere strongly to one another when brought into direct contact and cured (i) in the presence of an epoxy adhesive and (ii) in the presence of a diamine curing agent alone. It was further demonstrated that the ozone‐pretreated LDPE films and the Ar plasma pretreated PTFE films readily undergo photografting or thermal grafting with concurrent lamination when lapped together in the presence of a small quantity of the monomer solution. The simultaneous graft copolymerization and lamination process can be carried out under atmospheric conditions and in the complete absence of an added initiator or system degassing. Copyright © 1999 John Wiley & Sons, Ltd.