A Study of Poly(butylene Terephthalate) and Thermoplastic Polyurethane

Considered a brittle material, poly(butylene terephthalate) is inappropriate for certain applications requiring high impact resistance. In this report, we investigate improved poly(butylene terephthalate) by its blending with thermoplastic polyurethane 10% by weight prepared by injection molding technique. Tensile strength, flexural strength, and impact strength samples were tested and compared with those of the neat thermoplastic polyurethane and poly(butylene terephthalate). It is found that impact toughness is higher, while tensile and flexural strengths are lower than for the neat poly(butylene terephthalate). This study provides more insight into the effect of thermoplastic polyurethane on the mechanical properties of the blend.