Mechanical properties of ternary blends of poly(butylene terephthalate), bisphenol-a-polycarbonate and poly(hydroxyether of bisphenol-A)

✍ Scribed by P.M. Remiro; J. Nazabal

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 542 KB
• Volume: 28
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(92)90182-2

✦ Synopsis

Ternary poly(butylene terephthalate) (PBT)/bisphenol-A-polycarbonate (PC)/poly(hydroxyether of bisphenol-A) (phenoxy) blends, with PBT contents from 0 to 30% were obtained by melt-mixing. The presence of PBT clearly increases the ductility of the already rather ductile PC/phenoxy blends. The increase of ductility was accompanied by a slight synergism in the yield stress and by a very small change of the modulus of elasticity of the blends with PBT as compared to those without PBT. The observed fracture surface shows a ductile fracture with two phases without signs of debonding between them. It is established that a third polymeric component present in both phases of an immiscible blend may have a beneficial effect on the mechanical properties of the blend.