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Solvent-induced phase separation in ternary solutions of poly(methyl methacrylate), poly(styrene-co-acrylonitrile) and toluene

✍ Scribed by K. Reichelt; C. Kummerlöwe; H. W. Kammer


Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
995 KB
Volume
43
Category
Article
ISSN
0323-7648

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✦ Synopsis


Morphology evolution in ternary polymer solutions consisting of poly(methy1 methacrylate), poly(styrene-co-acryloni- trile) having different AN-contents and toluene was studied by optical microscopy and light scattering. The solutions subjected to different isothermal demixing conditions displayed regularly or irregularly phase separated structures. Effects of the AN-content ofthe SAN, the blending ratio and the annealing conditions on the arising morphologies are presented. A criterion for conservation of the periodic bicontinuous structure developed in the unmixing process can be established.

Losungsmittel-induzierfe Phasentrennung in ternaren Losungen von Poly(methylmethacrylat), Poly(styren-co-actylnitril) unrl Toluen

Die Entwicklung der Morphologie in ternaren polymeren Losungen von Poly(methylmethacrylat), Poly(styren-co-acrylnitril) mit unterschiedlichem Acrylnitrilgehalt und Toluen wurde mittels optischer Mikroskopie und Lichtstreuung untersucht. Bei unterschiedlichen isothermen Entmischungsbedingungen weisen die Losungen regulare oder irregulare Phasenseparationstrukturen auf. Die Einflusse des Acrylnitrilgehaltes der Copolymere, des Mischungsverhaltnisses und der Temperungsbedingungen auf die entstehenden morphologischen Strukturen werden dargestellt. Ein Kriterium fur die Erhaltung der beim EntmischungsprozeB entstandenen periodischen Zweiphasenstruktur wird angegeben.


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