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Pure Appl. Chem. Vol. 73, No. 6, pp. 913-926 (2001)

Pure and Applied Chemistry

Vol. 73, Issue 6

MACROMOLECULAR DIVISION
COMMISSION ON POLYMER CHARACTERIZATION AND PROPERTIES
WORKING PARTY ON STRUCTURE AND PROPERTIES OF
COMMERCIAL POLYMERS

Blends containing core-shell impact modifiers Part 2. Melt rheology of rubber-toughened plastics (IUPAC Technical Report)

M. Kozlowski1 and C. B. Bucknall*2

1Wroclaw Technical University, Wybrzeze Wyspianskiego 27, PL 50-370 Wroclaw, Poland; 2Advanced Materials Department, Cranfield University, Bedford MK43 0AL, UK

Abstract: The influence of impact modifiers composed of an elastomer-based core and a poly(methyl methacrylate) (PMMA) shell on the melt flow properties of different thermoplastics has been studied, using both steady-state and dynamic viscosity measurements. The melt viscosities of the rubber-toughened blends were similar to those of the matrix polymers, over the range of shear rates commonly applied during melt processing. In the case of the matrix polymers, viscosity curves obtained under dynamic conditions coincided with those obtained under steady-state conditions. However, for blends the two curves show a slight divergence at low strain rates, where yielding is observed.

> Download full text of the report - [pdf file - 376 KB]

> Link to Part 1: Structure and tensile deformation mechanisms

> View corresponding project

*Corresponding author

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