Get Adhesion and Bonding to Polyolefins (Rapra Review Reports) PDF

By D. M. Brewis, I. Mathieson

ISBN-10: 1859573231

ISBN-13: 9781859573235

ISBN-10: 185957419X

ISBN-13: 9781859574195

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Extra resources for Adhesion and Bonding to Polyolefins (Rapra Review Reports)

Example text

The treatments may be divided into gas phase and liquid phase methods. The former include the use of corona discharges, plasmas, flames and reactive gases such as fluorine. The liquid phase methods include chromic acid and halogen donors such as trichloroisocyanuric acid. Primers including chloropolypropylenes and isocyanates are sometimes used with polyolefins as an alternative to a pretreatment. • The pretreatments used for polyolefinic elastomers and polyolefinic plastics are generally quite different.

Reactive and inert atmospheric plasmas rapidly impart adhesion enhancement by a factor of two to ten as measured by 180 deg. peel tests. However, extended exposure to the atmospheric plasma does not impart additional adhesion enhancement as the surface is ablated revealing the underlying polymer with poor adhesive characteristics. In contrast, vacuum plasma treated LDPE and PETP show increased adhesion with extended plasma treatment. Adhesion enhancement in excess of two to three orders of magnitude is found to be achievable for vacuum plasma treatment times greater than 10 min.

The differing behaviour of the two elastomers was attributed to stronger interfacial attraction with SBR 1513 and its lower strength. General considerations governing the locus of failure during peel adhesion testing are discussed. 2 refs. Conference proceedings. Dallas, Texas, 6th-10th May, 2001, paper 234 EPOXY ADHESIVES: EFFECT OF PLASMA TREATMENT AND SURFACE ROUGHNESS ON EPOXY TO POLYETHYLENE BOND STRENGTH Petrie S P; Bardsley E F Massachusetts,University (SPE) JAPAN; USA The influence of surface treatment and ageing on the bond strength of epoxy bonded polyethylene was investigated.

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Adhesion and Bonding to Polyolefins (Rapra Review Reports) by D. M. Brewis, I. Mathieson


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