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Influence of Differently Structured Aluminium-Polypropylene Interfaces on Adhesion
来源:尹华杰博士个人网站 发布日期:2012-02-25
作者:Yin, Huajie; Mix, Renate; Friedrich, Joerg
关键字:POLYPROPYLENE,PLASMA, SURFACE WETTABILITY, PEEL STRENGTH
论文来源:期刊
具体来源:Journal of Adhesion Science and Technology
发表时间:2011年
Polar groups were introduced on polypropylene surfaces for increasing the surface energy and the peel strength to evaporated aluminium layers. Three kinds of plasma processes were used for introducing such functional groups to polyolefin surfaces: low-pressure radio-frequency (RF) O2 plasma exposure, atmospheric-pressure dielectric-barrier discharge (DBD) treatment in air, and the deposition of allylamine plasma polymer. The amino groups of the allylamine plasma polymer were also used as anchoring points for chemical introduction of covalently bonded spacer molecules equipped with reactive endgroups. Thus, silanol endgroups of a covalently bonded spacer were able to interact with the evaporated metal layer. The Al-PP composites achieved a maximal peel strength of 470 N/m by exposing the polymer to the lowpressure O2 plasma and 500 N/m on exposure to the atmospheric DBD plasma. After allylamine plasma polymerization and grafting of spacers, the peel strength was usually higher than 1500 N/m and the composites could not be peeled.
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