Relation between the repulsion of incompatible and compatible polymers in solution and their degree of mixing in the solid state: the memory effect

✍ Scribed by V Christopoulou; D Papanagopoulos; A Dondos

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 746 KB
• Volume: 49
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/1097-0126(200011)49:11<1365::aid-pi495>3.0.co;2-2

✦ Synopsis

The incompatible polymer pairs polystyrene (PS)/poly(methyl methacrylate) (PMMA) and polystyrene (PS)/poly(oxyethylene) (POE) and the compatible polymer pair POE/PMMA have been studied in solution and in the solid state. A close relation is observed between the behaviour in solution and in the solid state for both incompatible and compatible polymer mixtures. When we use a selective solvent and when the molecular masses of the polymers of the mixture are different, even compatible polymers behave like incompatible polymers; the obtained ®lms present an important demixing. The opposite is observed when the ®lms are obtained by casting from a common solvent and when the two polymers possess similar molecular masses. In this case, even incompatible polymers behave like compatible polymers. These results con®rm the already reported memory effect when we go from the solution to the solid state.