Physical properties of polyester elastomer/PMMA blends

The thermal, mechanical, morphological and rheological properties of the polyester elastomer blended with poly(methyl methacrylate) by melt blending were investigated. The miscibility of PEL/PMMA blends were characterized by glass transition temperatures and the maximum melting temperature of the blends in all compositions. The maximum melting temperature of PEL in the blends remains nearly constant. Heat of fusion of blends decreased linealy with increasing the fraction of PMMA, however, the density of the blends increased linealy with increasing the fraction of PMMA. When the PMMA contents was higher than 20 wt%, elongation-at-break of blends decreased drastically. Young's modulus and tensile strength of the blends showed a minor deviation from the straight line which is a typical trend of incompatible polymer blend systems. In the rheological properties characterized by RMS, the loss modulus, storage modulus, and complex viscosity of blends indicated that well dispersed spherical domains were formed in the matrix, which was also confirmed by SEM examination.