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Rheological behavior of styrene‐maleic anhydride/polyol blends obtained through reactive processing
Author(s) -
Bayram G.,
Yilmazer U.,
Xanthos M.,
Patel S. H.
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10938
Subject(s) - materials science , maleic anhydride , polymer chemistry , zinc , fourier transform infrared spectroscopy , dynamic mechanical analysis , copolymer , rheometry , chemical engineering , rheology , composite material , polymer , engineering , metallurgy
The condensation reaction of styrene‐maleic anhydride copolymer (SMAH) with polytetramethylene ether glycol (PTMEG) in the presence or absence of a hydrated zinc acetate catalyst was studied in a batch mixer. As a control, pure SMAH and an SMAH/catalyst blend were also subjected to the same processing conditions. The reaction characteristics of the blends were investigated by Fourier transform infrared spectroscopy (FTIR) and thermal and rheological analysis. FTIR analysis of the SMAH/PTMEG blend indicated ester formation. The addition of zinc acetate and/or PTMEG to SMAH decreased the glass transition temperature of pure SMAH. Oscillatory shear properties of storage modulus, G ′, loss modulus, G ″, and complex viscosity, η*, were measured. The SMAH/PTMEG/zinc acetate blend had higher G ′, G ″, and η* than the blend without the zinc acetate catalyst. The parameters of the relaxation spectra were calculated by using the experimental oscillatory data and the generalized Maxwell model. Zero shear viscosity and the mean relaxation time increased with addition of zinc acetate and/or PTMEG to SMAH as a result of chain extension/branching reactions. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2615–2623, 2002