Abstract
The pressure sensitive adhesive (PSA) properties of the poly(ethyl acrylate) (PEA)/poly(vinylidene fluoride-co-hexafluoro acetone) [P(VDF-HFA)] blends were investigated with blend compositions of P(VDF-HFA) contents from 0 to 50 wt%. PSA properties, such as 180° peel adhesion, J. Dow ball tack and probe tack, decreased with increasing P(VDF-HFA) content, whereas holding power increased. The effects of the morphology, critical surface tension γC and dynamic mechanical properties on the PSA properties of the PEA/P(VDF-HFA) blends were also investigated. The morphology and γC values were changeless in blends with P(VDF-HFA) contents varied from 0 to 50 wt% region. On the other hand, dynamic mechanical properties, such as the storage modulus G′, loss modulus G″ and glass transition temperature Tg increased monotonically with increasing P(VDF-HFA) content in the blends. Therefore, it was expected that PSA properties in PEA blends could be controlled with P(VDF-HFA) contents in relation to G′, G″ and Tg properties.
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