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Pressure‐Sensitive Adhesive Blend Films for Low‐Tack Applications
Author(s) -
MüllerBuschbaum Peter,
Ittner Thilo,
Maurer Edith,
Körstgens Volker,
Petry Winfried
Publication year - 2007
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200700053
Subject(s) - materials science , adhesive , polystyrene , composite material , acrylate , polymer blend , polymer , small angle x ray scattering , phase (matter) , copolymer , scattering , optics , chemistry , organic chemistry , layer (electronics) , physics
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.