Reactive processing of styrene-maleic anhydride and epoxy functionalized polymer blends

Bayram, G
Yılmazer, Ülkü
Xanthos, M
The reaction of styrene-maleic anhydride (SMA) with polyethylene/methyl acrylate/glycidyl methacrylate (E-MA-GMA) was studied in a batch mixer and in a corotating twin screw extruder. Also, the mixing of a nonreactive blend of SMA with polyethylene/methyl acrylate (E-MA), with similar rheological properties to E-MAG-MA, was studied under the same processing conditions. The mixing products of reactive and nonreactive systems exhibited drastically different properties. Reactive blends showed higher tensile modulus, tensile strength, strain at break and complex viscosity in comparison to non-reactive blends. The reactive blends had also finer morphology than the non-reactive ones.


Anhydride/epoxy functionalized blends: Mechanical, rheological and thermal properties
Bayram, G; Yılmazer, Ülkü (2001-11-30)
Blends of styrene-maleic anhydride (SMAH) and polyethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) were produced in a batch mixer and in a corotating twin screw extruder. E-MA-GMA concentration was varied from 0% to 50%. Batch mixing indicated that the blend system was reactive. Extruded blends were characterized in terms of rheological, thermal and mechanical properties, and their morphology was observed. Rheological properties such as the storage modulus, loss modulus and complex viscosity exhibi...
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...
YILMAZ, H (1992-05-25)
The geometries of the low-lying isomers of phosphorus P2 to P10 were calculated using the semiempirical modified neglect of diatomic overlap method. It was found that, in those cases (P2 and P4) where spectroscopic data are available, the bond strengths are overestimated. The binding energies were found to be underestimated in those cases (P2, P3 and P4) where thermodynamically derived values for the gas phase are available. A roof-shaped tetramer is a prominent structural unit in low-lying states of P5, P6...
Rheological properties of poly(lactic acid) based nanocomposites: Effects of different organoclay modifiers and compatibilizers
Acik, Eda; Orbey, Nese; Yılmazer, Ülkü (2016-01-20)
Poly(lactic acid) (PLA) nanocomposites containing five types of organically modified, layered silicates and two elastomeric compatibilizers, namely ethylene-glycidyl methacrylate (E-GMA) and ethylene-butyl acrylate-maleic anhydride (E-BA-MAH), were prepared using a twin screw extruder. The morphologies of the nanocomposites were determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM), and the rheological properties of the melts were measured using small-amplitude oscillatory shear. ...
Thermal inactivation of native and crosslinked invertases
Kaplan, O; Bakir, U; Erarslan, A (1997-09-01)
Formaldehyde and three homobifunctional bisimidoesters having different lengths, dimethyl suberimidate (DMS), dimethyl adipimidate (DMA), dimethyl-3,3'-dithiobispropionimidate (DTBP), were used to crosslink invertase. Optimal concentrations for crosslinking with DMS and formaldehyde were determined as 0.3% and 0.015%, respectively. Inactivation mechanisms of the native, DMS and formaldehyde cross-linked invertases were first order during prolonged heat treatment. The maximum stabilization factors with DMS a...
Citation Formats
G. Bayram, Ü. Yılmazer, and M. Xanthos, “Reactive processing of styrene-maleic anhydride and epoxy functionalized polymer blends,” 1999, Accessed: 00, 2020. [Online]. Available: