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Effect of Shear History on the Morphology and Coarsening Behaviour of Polycarbonate/poly(styrene-co-acrylonitrile) Blend by Gehan M. Hanafy; Samy A. Madbouly; Toshiaki Ougizawa; Takashi Inoue is a Materials Science article available to read on EtoBox.

What is Effect of Shear History on the Morphology and Coarsening Behaviour of Polycarbonate/poly(styrene-co-acrylonitrile) Blend about?

The morphology and coarsening behaviour of polycarbonate (PC) blend with styrene-co-acrylonitrile (SAN) random copolymer of 25 wt% AN have been investigated as a function of shear history using transmission electron microscope (TEM) and time resolved light scattering techniques. Simple shear apparatus of two parallel plates geometry was used to generate different shear rate values depending on the different distances from the centre of the sample disk. The morphology of PC/SAN-25Z70/30 blend showed that the dispersed phase of SAN was elongated and broken-up in the direction of flow with weaker contrast at high shear rate values. The shear rate was found to suppress the concentration fluctuations and enhance the miscibility of SAN (dispersed phase) in the PC matrix to a great extent. The average of the dispersed particle diameter was evaluated as a function of different shear memories at 240 8C for different time intervals based on the Debye-Bueche theory. The obtained data were found to be shear memory dependent i.e. the average particle diameter decreases with increasing shear memory. This result indicated that the coarsening process is greatly suppressed by shear memory and the s

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Author

Gehan M. Hanafy; Samy A. Madbouly; Toshiaki Ougizawa; Takashi Inoue

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0032-3861)

Published

2005

Language

EN

Field

Materials Science (Physical Sciences)