1999 Volume 50 Issue 1 Pages 29-36
The tensile and thermal properties of two series of miscible polymer blends based on poly-β-hydroxybutyrate (PHB) were investigated. The elongation at break (εb) for once-melted blend with polyvinyl acetate (PVAc) in which PVAc fraction is 0.5-0.8 increased remarkably while that for as-cast blend with polyethylene oxide (PEO) in which PEO fraction is 0.2-0.4 increased slightly. These results were compared with those of DSC measurement. It was found that E b for the miscible blends was higher than for the immiscible blends and this εb can be increased as far as PHB remains in its amorphous state. In addition to the above, PHB and PEO were immiscible in the blends prepared in the present study.
