Abstract
Uniaxial orientation of poly(methyl methacrylate) (PMMA) and poly(ethylene oxide) (PEO) chains in their compatible blends has been measured using infra-red dichroism and birefringence. The influence of strain rate, temperature of stretching and PEO molecular weight on orientation of both polymer chains in blends containing up to 20% PEO has been studied. Mechanical relaxation master curves at a reference temperature T = T g + 50°C have also been determined. The results are interpreted in terms of a hindrance of relaxation of PMMA chains induced by a modification of friction coefficients due to the molecular interactions that are at the origin of compatibility.
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