Functionalized inorganic/organic nanocomposites as new basic raw materials for adhesives and sealants Part 2
✍ Scribed by F. Bauer; U. Decker; H. Ernst; M. Findeisen; H. Langguth; R. Mehnert; V. Sauerland; R. Hinterwaldner
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 417 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0143-7496
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✦ Synopsis
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. 29 Si 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.