2017 (1) 4

https://doi.org/10.15407/polymerj.39.01.32

The viscoelastic properties of the poly(methyl methacrylate) modified by polyurethane with different molecular weight of oligoester block

N.V. Babkina, O.I. Antonenko, L.F. Kosyanchuk

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine

Polym. J., 2017, 39, No. 1: 32-38.

Section: Structure and properties.

Language: Russian.

Abstract:

The viscoelastic properties of crosslinked polyurethanes (PU) based on oligo(diethylene glycol) adipate (ODA) with MM 800, 1500, 2500 and poly(methyl methacrylate) modified by polyurethanes with corresponding value of MM ODA have been studied. It was found that the blend of PMMA/PU with ratio 70/30 % wt. is the two-phase polymer system with well-defined interfacial area and it content and composition depends on the MM ODA. The proportional decreasing of the glass transition temperature (Tg) for crosslinked PU with increasing of MM ODA has been shown, but such regularity for the blend of PMMA/PU is not observed. Analysis of viscoelastic functions for PMMA modified by PU with different MM ODA has demonstrated that the viscoelastic characteristics, the degree of phase separation in the system and its phase structure are significantly determined by the molecular weight of oligoester block. It may be caused by the changes of viscosity of the initial reaction system and kinetic conditions of the blend formation.

Key words: modified poly(methyl methacrylate), polyurethane, molecular weight of oligoester block, viscoelastic properties, interfacial area, degree of segregation.

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