Journal
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
Volume 26, Issue 7, Pages 567-570Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijadhadh.2005.11.001
Keywords
adhesives; sealants; hot-melt adhesives; nanocomposites
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A high content of nano-sized silica, alumina and titania was embedded in epoxy Novolac adhesives. By grafting a glycidyloxypropyl functionalized trialkoxysilane on different nanoparticles polymerization-active fillers were prepared. Si-29 NMR and MALDI-TOF mass spectrometry revealed oligomeric siloxane structures present on the surface of coated nanoparticles. In heat-induced polymerization reactions these surface-modified nanoparticles form covalent crosslinks to the epoxy resin, thus efficiently modifying the viscoelastic properties. The reinforced nanocomposites revealed shifts of the glass transition temperatures of about 20 K pointing to the improved thermal stability. (C) 2005 Elsevier Ltd. All rights reserved.
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