Thermal and mechanical properties of epoxy/monofunctional and epoxy/multifunctional POSS nanocomposites

Shan Lu, George C. Martin

Research output: Contribution to conferencePaperpeer-review

5 Scopus citations

Abstract

The thermal and mechanical properties of diglycidyl ether of bisphenol-A (DGEBA) copolymerized with two types of polyhedral oligomeric silsesquioxane (POSS) nanophases, namely, monofunctional POSS-epoxide macromer (MoPOSS) and multifunctional POSS-epoxide macromer (MuPOSS) cured with polyoxypropylene diamine were investigated. The glass transition temperature, Tg, measured by DSC increased with an increasing weight fraction of the MoPOSS. For the MuPOSS series, the Tg of the composite containing 3.0 wt.% MuPOSS increased; however, the Tg's of the composites containing equal to or greater than 5.0 wt.% MuPOSS decreased because of a reduced cross-linking density and a plasticization effect from the excess curing agent. The curing of the MoPOSS systems followed first-order kinetics with lower activation energies and frequency factors. TGA experiments indicated that both types of the POSS provided enhancement in the thermal stabilities compared to the epoxy network. Fracture analysis showed that the POSS-incorporated epoxy network glasses had higher fracture toughness values than the neat epoxy resin.

Original languageEnglish (US)
Pages1893-1897
Number of pages5
StatePublished - Oct 14 2003
Event61st Annual Technical Conference ANTEC 2003 - Nashville, TN, United States
Duration: May 4 2003May 8 2003

Other

Other61st Annual Technical Conference ANTEC 2003
CountryUnited States
CityNashville, TN
Period5/4/035/8/03

Keywords

  • Epoxy resin
  • Nanocomposites
  • POSS
  • Toughening

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics

Fingerprint Dive into the research topics of 'Thermal and mechanical properties of epoxy/monofunctional and epoxy/multifunctional POSS nanocomposites'. Together they form a unique fingerprint.

Cite this