Inaccessible Substructures

The tack test was performed in fixed experimental conditions the probe (a glass cylinder of 2 mm diameter) was pressed with a force of 6 N onto the PSA film surface. After 10 s of contact time the probe was withdrawn with a constant velocity of 1050 pm s . In Fig. 26.4, horizontal cuts for both sample systems are displayed. The curves correspond to different distances between the 

As the radii of the cylinders are most probably polydisperse, the form factor Fo(qy) was folded with a log normal distribution/(r) of the cylinder radii r [Eq. 

Furthermore, the structure factor can be expressed within a paracrystalline model by Eq. (6) [42]. 

A local deviation of the distance between next-neighboring cylinders from its mean value is quantified by the roughness parameter a. The diffuseness of the interfaces is modeled with a simple roughness parameter (Tr [Eq. (7)] [25]. 

Inversion symmetry mj 9) is broken by D 0 /2. Thus the ratio t]= D /(2 Dy ) is considered as a parameter governing the degree of positional asymmetry. In detail 42 / 50 holds for all the scattering curves in Fig. 26.4b. The total number of objects n caruiot be determined by the parabolic fit. Nevertheless, a lower limit can be extracted from the number of side minima i (fringes). As 11 minima have been observed on one side in the scattering curves, n has to exceed 2i=22. For all film-punch distances the relation 210 nm nDyQ 257 nm is valid. 

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