2016 (1) 3

https://doi.org/10.15407/polymerj.38.01.024

Features of the formation, the phase structure, viscoelastic and mechanical properties of the binary polymer matrice based on polymethylmethacrylate, modified by crosslinked polyurethane

N.V. Babkina, T.D. Ignatova, L.F. Kosyanchuk,  O.I. Antonenko, L.A. Vorontsova, O.V. Babich

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shоse, Kyiv, 02160, Ukraine

Polym. J., 2016, 38, no. 1: 24-33.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The kinetic regularities of formation, feature of the phase morphology, viscoelastic and mechanical properties of binary polymer matrice based on polymethylmethacrylate modified with 10, 20 and 30 % wt. of crosslinked polyurethane have been studied. It has been shown that the formation of polymethylmethacrylate-polyurethane semi-IPNs accompanied by phase separation that occurs in two stages: on the first stage the mechanism of nucleation and growth takes place, and the second stage is superposition of mechanisms of nucleation and spinodal decomposition. As a result the polymer system with two phases and quasicompatible interfacial region is formed. The increase of polyurethane content leads to acceleration of the phase separation process in the system. At that the domains with larger size are formed and the fraction of the interfacial region depending on the content of polyurethane is growing. An increase of the fraction of interfacial region in polymethylmethacrylate modified by crosslinked polyurethane is accompanied by increasing of elongation and can enhance its impact resistance.

Keywords: impact-resistant polymethylmethacrylate, kinetics, phase morphology, interfacial region, viscoelastic properties.

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