2003, Volume 6, Issue 11+12
Surface Modification of Polymers for Adhesive Bonding
National Institute of Cryogenics & Isotopic Technologies, Rm. Valcea
The chemically modifying polymer surfaces may be classified as surface grafting by irradiation, chemical surface grafting and chemical treatment of surfaces [1,2]. The first two categories involve the production of a surface layer of a second polymer, grafted to the base polymer.Among the chemical treatments are oxidation, especially of polyethylene. Acid and alkali treatments, halogenation, sulphonation (concentrated or fuming sulphuric acid or chlorosulphonic acid),and treatment with chlorosilanes have been applied to a number of different polymers [3,6]. Fluorinated polymers may be modified by treatment with alkali metals. In this paper we describe in detail a procedure for modifying polymer surface as polytetrafluoroetlylene for to enhance its wettability and from adhesion. Because polytetrafluoroetlylene is very different to other plastics regarding mechanical and chemical properties the modifying of its surface is important from a scientific as well as practical point a view.
Polytetrafluoroetlylene, sodium, aluminium, adhesive, joint.
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