Synthesis and evaluation of new radical photoinitiators bearing trialkoxysilyl groups for surface immobilization

Research output: Contribution to journalArticleResearchpeer-review

External Organisational units

  • Erich Schmid Institute of Materials Science
  • University of Warsaw
  • Polymer Competence Center Leoben GmbH

Abstract

Photoinitiators, which can be readily immobilized on surfaces, e.g. on the surface of nanoparticles, have gained considerable attention of both scientists and engineers. The main reason for this interest is that immobilized initiators lead to a covalent linkage between the surface and the resulting polymer chain. Thus, immobilized photoinitiators are expected not to migrate out of the polymer network, which reduces potential health risks. This paper describes the synthesis of a range of short- and long-wavelength absorbing photoinitiators bearing trialkoxysilyl units. The synthesis starts from commercially available products, Irgacure 2959 or Irgacure TPO-L, and takes 1–4 steps. While some of the reported initiators were previously sparsely described in patents, but lack a systematic study, others are reported for the first time. Both free and immobilized initiators were characterized and tested with regard to their efficiency in acrylic and thiol-ene systems. The findings confirm the good applicability of the nanoparticle-immobilized photoinitiators in the preparation of nanocomposite materials.

Details

Original languageEnglish
Pages (from-to)207-220
Number of pages14
JournalPolymer
Volume129.2017
Issue number27 October
DOIs
Publication statusE-pub ahead of print - 25 Sept 2017