Influence of the bulk and surface morphology on adhesion of polystyrene-inter-poly-cross-2-ethylhexyl-methacrylate films and particles

Graaf de, Leontine A. and Albers, Pieter-Jan W. and Möller, Martin (1996) Influence of the bulk and surface morphology on adhesion of polystyrene-inter-poly-cross-2-ethylhexyl-methacrylate films and particles. Journal of Polymer Science, Part B: Polymer physics, 34 (11). pp. 1839-1852. ISSN 0887-6266

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Abstract:	The adhesion behavior of semi-interpenetrating polymer networks (semi-IPNs) of linear polystyrene (PS) in crosslinked poly-2-ethylhexylmethacrylate (EHMA) was studied by variation of the bulk and surface morphology, i.e., domain size, continuity, and concentration in the domains. Semi-IPNs were prepared by liquid-liquid demixing upon cooling of a homogeneous solution of PS in methacrylate monomer, followed by gelation of the PS-rich phase and UV polymerization of the methacrylate resin. Welding of films allowed the preparation of larger objects provided that (1) the samples were phase separated to a high degree and contained domains with a high PS concentration (>90%) and (2) polystyrene was present at the interface. For semi-IPN films, a linear dependence of the adhesion strength on the (crack healing time)1/4 was obtained. Based on these considerations, a process was developed to obtain melt-processable semi-IPN particles, by quenching droplets of the polymer solution into a cold liquid. These particles obtained a PS-rich skin layer and showed good adhesion after blending with a thermoplast.
Item Type:	Article
Copyright:	© 1996 Wiley InterScience
Research Group:	Materials Science and Technology of Polymers (MTP)
Link to this item:	http://purl.utwente.nl/publications/71259
Official URL:	http://dx.doi.org/10.1002/(SICI)1099-0488(199608)34:11<1839::AID-POLB1>3.0.CO;2-N
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