Pressure-Sensitive Adhesive Blend Films for Low-Tack Applications

✍ Scribed by Peter Müller-Buschbaum; Thilo Ittner; Edith Maurer; Volker Körstgens; Winfried Petry

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 419 KB
• Volume: 292
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200700053

✦ Synopsis

Abstract

Polymer blend films consisting of a tacky and a nonadhesive component are promising candidates for low‐tack applications. Immiscibility of both components results in a phase separation process yielding a tacky matrix with glassy objects embedded. The influence of the blending ratio of the components poly(n‐butyl acrylate) (PnBA) and polystyrene (PS) is addressed. The mechanical information resulting from the tack test shows the possibility of varying the bonding strength of the PSA blend over a wide range. The macroscopic and microscopic structural characterization with optical microscopy and ultrasmall angle X‐ray scattering (USAXS) shows that the blend PnBA/PS exhibits similarities to common filler systems as well as deviates regarding installed structures. Due to the large domain size on a microscopic level, only the tacky component, PnBA, defines the adhesive behavior. The nonadhesive component limits the contact area between the adhesive and the substrate.

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