Poly(butylene terephthalate) (PBT) is difficult to foam due its unfavorable rheological behavior (low melt strength, no strain hardening). In particular, a high expansion and homogeneous cell morphology are achieve. This can be altered successfully by addition of multifunctional chain extenders. Chain extenders cause nondefined rarely understood changes in the polymer architecture usually descr...

Mixtures of poly(butylene-adipate-co-terephthalate) (PBAT) with thermoplastic starch (TPS) in a broad concentration range from 70:30 to 30:70 wt.% were prepared twin-screw extruder. Mechanical properties tested, showing that the addition TPS leads substantial decrease tensile strength as well elongation at break, while Young’s modulus is rising substantially. Additional data collected by dynami...

Hydrothermally synthesized acicular nano-apatite (Nap) was used as filler to make composites with a polyethylene glycol/poly(butylene terephthalate) (PEG/PBT) block copolymer (Polyactive 70:30). The Nap had a particle diameter of 9-25 nm and a length of 80-200 nm. The mechanical properties and the physiochemical characteristics of the composites, such as Young's modulus, swelling degree in wate...