Accession Number:

ADA459011

Title:

Miscibility and Viscoelastic Properties of Acrylic Polyhedral Oligomeric Silsesquioxane-Poly(methyl methacrylate) Blends (Postprint)

Descriptive Note:

Journal article

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMICAL ENGINEERING

Report Date:

2005-04-22

Pagination or Media Count:

11.0

Abstract:

Blends of polymethyl methacrylate PMMA with two acrylic polyhedral oligomeric silsesquioxanes POSS were analyzed to determine the effect of well-dispersed POSS nanoparticles on the thermo-mechanical properties of PMMA. Differential scanning calorimetry DSC, dynamic mechanical analysis DMA, and melt rheology all showed that the dispersed POSS behaved like a plasticizer. Differential scanning calorimetry DSC showed a larger drop in the glass transition temperature Tg in the blends containing unmodified acrylic-POSS when compared with hydrogenated acrylic-POSS blends at the same loading. This difference in the degree of Tg plasticization was directly related to the degree of miscibility of the POSS and PMMA.

Subject Categories:

  • Polymer Chemistry
  • Plastics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE