By D. M. Brewis, I. Mathieson
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Extra info for Adhesion and Bonding to Polyolefins (Rapra Review Reports)
8). , the corona discharge method. As noted in Section 4, there have been many detailed studies relating to the pretreatment of plastics. Much is now known about these pretreatments including the chemical groups introduced, their concentrations and the depth of chemical modification. In contrast, the number of studies involving elastomers is much lower and in general the studies have been much less informative. One of the reasons for this is that elastomers usually contain several additives often in relatively high concentrations.
Scanning electron microscopy observations indicated increased adhesion which was confirmed by the improved properties achieved during mechanical testing. It was shown that, although using the copolymer by itself was a better adhesion promoter than the individual silane coupling agents, the combination of all three gave the greatest adhesion. Full details of the test procedures are given and the results discussed. 15 refs. 1140-9 SURFACE MODIFICATION OF HDPE AND PP BY MECHANICAL POLISHING AND DC GLOW DISCHARGE AND THEIR ADHESIVE JOINING TO STEEL Bhowmik S; Ghosh P K; Ray S Roorkee,University The preparation of the surfaces of HDPE and PP for adhesive bonding has been examined using mechanical polishing followed by DC glow discharge techniques.
With increasing graft copolymerisation time, the amount of adsorbed water on PE film increased. When the graft copolymerisation time reached 3 h, a different crystal form was formed. 11 refs. Surface modification of HDPE surfaces by plasma polymerisation of glycidyl methacrylate(GMA)(ppGMA-HDPE surfaces), in the absence and presence of argon plasma pre-activation of the HDPE surfaces, was carried out with the aim of enhancing the adhesion of the polymer with evaporated copper. FTIR and X-ray photoelectron spectroscopic results suggested that the epoxide functional groups on the pp-GMA-HDPE surfaces had been preserved to various extents, depending on the radiofrequency(RF) power used during plasma polymerisation.