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Interphase development in a three-component polymer system with asymmetric mobility

✍ Scribed by María de la Paz Miguel; J. Pablo Tomba

Book ID
105339334
Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
285 KB
Volume
48
Category
Article
ISSN
0887-6266

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✦ Synopsis

Abstract

We report a study on the interphase evolution in a system composed by three polymeric components with markedly different mobility distributed between two layers. One of the layers is a low‐T~g~ blend containing a low molecular weight polystyrene (PS) as a plasticizer (low‐M PS) and PS chains with much higher molecular weight (high‐M PS). The counterpart is a high‐T~g~ layer composed by polyphenylene oxide. The system was annealed at several temperatures between T~g~ of the polymer layers and the subsequent interphase development probed by optical sectioning with confocal Raman microspectroscopy. The profiles obtained revealed the existence of two diffusion fronts that advance in opposite directions, both showing a similar response with time and temperature. These fronts act as well‐defined boundaries that structure the interphase into three well‐defined regions with almost constant PS volume fraction. We discuss this particular phenomenology proposing a simple diffusion model that describes the main interphase features. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 627–633, 2010

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