Dresden 2006 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 9: SYMPOSIUM Disperse Polymer Systems II
CPP 9.5: Talk
Tuesday, March 28, 2006, 15:15–15:30, ZEU 160
Structure creation in pressure sensitive adhesives — •E. Maurer1, S. Loi1, D. Wulff2, N. Willenbacher2, M. Ruckpaul2, and P. Müller-Buschbaum1 — 1TU München, Physik-Department E13, James-Franck-Str. 1, D-85747 Garching, Germany — 2BASF Aktiengesellschaft, Carl-Bosch-Str.38, D-67056 Ludwigshafen, Germany
Pressure sensitive adhesives (PSA) play an important role as materials in the glue industry as well as in everyday life. The adhesion properties are depending decisive on the bonding history, which means parameters like contact pressure and time, temperature and debonding rate. Previous experiments were restricted to optical investigations addressing the macroscopic fibril structure. With ultra small angle x-ray scattering (USAXS) the microscopic length scales of the polymeric material have been investigated in the presented work. For this purpose an apparatus, combining both, a reproducible mechanical experiment of adhesive bonding and debonding and the requirements of in-situ scattering experiments, was built. Due to the weak scattering synchrotron radiation was required. The observed scattering signals show pronounced features originating from a highly ordered substructure of the adhesive material [1]. Several types of PSAs, homopolymers as well as statistical copolymers have been investigated.
[1] E.Maurer, S.Loi, D.Wulff, N.Willenbacher, P.Müller-Buschbaum; Physica B 357, 144 (2005)