Rheological behavior of styrene-maleic anhydride/polyol blends obtained through reactive processing

Date

2002-09-19

Author

Bayram, G
Yılmazer, Ülkü
Xanthos, M
Patel, SH

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

140
views

0
downloads

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, eta*, were measured. The SMAH/PTMEG/zinc acetate blend had higher G', G", and eta* 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. (C) 2002 Wiley Periodicals, Inc.

Subject Keywords

FTIR spectra, Reactive processing, Relaxation spectra, Viscoelastic properties, Styrene-maleic anhydride, Polyol

URI

https://hdl.handle.net/11511/57123

Journal

JOURNAL OF APPLIED POLYMER SCIENCE

DOI

https://doi.org/10.1002/app.10938

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Viscoelastic properties of reactive and non-reactive styrene-maleic anhydride olefinic blends Bayram, G; Yılmazer, Ülkü; Xanthos, M (2000-05-11) Reactive blends of styrene-maleic anhydride (SMAH) with polyethylene/methyl acrylate/glycidyl methacrylate (PE-F) and non-reactive blends of SMAH with polyethylene/methyl acrylate (PE-NF) were produced and characterized in terms of morphology and viscoelastic properties in order to understand the reaction characteristics between anhydride/epoxy functional groups. Storage modulus, G', loss modulus, G " and complex viscosity, eta* of reactive blends at 25 % and 50 % PE-F were higher than those of non-reactive...
Electrochemical synthesis of crowned conducting polymers : nature of radical cations in polymerization and mechanism of conductivity Cihaner, Atilla; Önal, Ahmet Muhtar; Department of Chemistry (2004) Poly(dibenzo-18-crown-6) (Poly(DB18C6)) was synthesized by electrochemical oxidation of dibenzo-18-crown-6 (DB18C6) using a mixture of acetonitrile and dichloromethane as solvent and tetrabutylammonium tetrafluoroborate (TBABF4) or tetrabutylammonium hexafluorophosphate (TBAPF6) as supporting electrolyte. The anodic polymerization of DB18C6 was investigated using in-situ ESR and in-situ UV-VIS spectroscopic techniques. Spectroelectrochemical (SPEL) properties and thermal analysis of the resulting polymers h...
Dimethyl Ether Synthesis over Novel Silicotungstic Acid Incorporated Nanostructured Catalysts Ciftci, Aysegul; VARIŞLI, DİLEK; Doğu, Timur (2010-01-01) Dimethyl ether (DME), which is an excellent green diesel-fuel alternate with excellent clean burning properties, is synthesized by dehydration of methanol over novel solid acid catalysts, which are synthesized following a direct hydrothermal route and using silicotungstic acid (STA) as the active compound. These mesoporous silicate structured catalysts have surface area values of 108-393 m(2)/g, depending upon their W/Si ratio. These catalysts showed very high methanol dehydration activity and also very hig...
Reactive extrusion of styrene maleic anhydride copolymer and polyol blends Bayram, G; Yılmazer, Ülkü; Xanthos, M (1998-04-30) The reaction of styrene-maleic anhydride with a low molecular weight polytetramethylene ether glycol was studied in an intensive batch mixer and in a corotating twin screw extruder. The reaction mixtures were later compression molded in the form of films. The films analyzed by FTIR spectroscopy showed the presence of both carboxylic acid and ester groups. Physical and mechanical properties of the materials were evaluated at different reactive processing conditions. The glass transition temperature of the mi...
Spectroelectrochemical investigation of the anodic oxidation of dibenzo-18-crown-6 Cihaner, A; Önal, Ahmet Muhtar (Elsevier BV, 2004-10-01) Poly(dibenzo-18-crown-6) (poly-DB18C6) was synthesized by electrochemical oxidation of dibenzo-18-crown-6 (DB18C6) using a mixture of acetonitrile and dichloromethane as the solvent and tetrabutylammonium tetrafluoroborate (TBABF(4)) or tetrabutylammonium hexafluorophosphate (TBAPF(6)) as supporting electrolyte. The anodic polymerization of DB18C6 was investigated using in situ ESR and in situ UV-Vis spectroscopic techniques. Spectroelectrochemical (SPEL), properties and thermal analysis of the resulting po...

Citation Formats

G. Bayram, Ü. Yılmazer, M. Xanthos, and S. Patel, “Rheological behavior of styrene-maleic anhydride/polyol blends obtained through reactive processing,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 2615–2623, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57123.