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Viscoelastic properties of copolycarbonates comprising isosorbide and 1,4-cyclohexanedimethanol.
- Source :
- Colloid & Polymer Science; Oct2023, Vol. 301 Issue 10, p1231-1238, 8p
- Publication Year :
- 2023
-
Abstract
- Viscoelastic properties of copolycarbonate materials comprising isosorbide (ISB) and cyclohexanedimethanol (CHDM) were studied as a function of the ISB content. In the glassy state, β dispersion was clearly detected in the dynamic mechanical spectra. The tensile storage modulus E′ at room temperature increased with the ISB content, and the glass transition temperature T<subscript>g</subscript>, i.e., peak temperature of α dispersion, increased with the ISB content. It was found from oscillatory shear modulus that the rubbery plateau modulus G<subscript>N</subscript><superscript>0</superscript> decreased with the ISB content. The entanglement molecular weights M<subscript>e</subscript> were found to be 2330–3640, which were slightly higher than that of bisphenol-A polycarbonate and much lower than those of poly(methyl methacrylate) and polystyrene. The onset shear stress of shark-skin failure at capillary extrusion was evaluated and found to increase with the ISB content. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0303402X
- Volume :
- 301
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Colloid & Polymer Science
- Publication Type :
- Academic Journal
- Accession number :
- 172312913
- Full Text :
- https://doi.org/10.1007/s00396-023-05143-9