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

Leontine A. de Graaf, Pieter-Jan W. Albers, Martin Möller

Research output: Contribution to journalArticleAcademic

3 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)1839-1852
JournalJournal of polymer science. Polymer physics edition
Volume34
Issue number11
DOIs
Publication statusPublished - 1995

Keywords

  • Interpenetrating polymer networks (semi-)
  • Polystyrene
  • Polymethacrylate
  • Adhesion

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