Thermoplastic blends with poly ether ester elastomers

Thermoplastic blends with poly (ether ester) elastomers 

Similar to PEBA-containing blends (not reported above due to missing reports in the open literature), the compatibility between PEE and other polymers may arise from electron donor-electron acceptor interactions (between the carbonyl and ether groups of PEE, and dipoles of the other blend 

Blending of a crystallizable homopolymer and a copolymer containing blocks of the same homopolymer could result in cocrystallization of the common component and provide a large amount of tie molecules linking the two blend components. To explore this opportunity, a blend of PBT and a poly(ether 

The PEE was prepared on a semicommercial scale [29] from PBT and PEG of molecular weight 1000 in a weight ratio of 1 1. Neat PBT and PEE were cooled in liquid nitrogen, then finely ground and blended (1 1 by wt). Films of the blend and of the respective neat components were prepared by means of a capillary rheometer equipped with metal rolls for immediate pressing the extruded bristle. The films obtained were 3-4 mm wide and 100-150 pm thick depending on the extrusion rate and the force applied to the rolls after cold drawing (A = 4-8) they were annealed with fixed ends for 6 h at 170°C (neat PBT and PEE) or at 170, 180, 190, and 200°C (PBT/PEE blend) in a vacuum oven [28]. 

At low temperatures (below 100°C), only one weak maximum is observed. With the rise of the sample temperature during the SAXS measurement, T, a new maximum appears at a smaller angle. The intensity of the two maxima increases up to = 180 C at this temperature the maximum at the smaller angle disappears, as does the other one at = 230°C. Bearing in mind the melting temperatures of the two components [28], it is easy to assign the 

---

PC is more resistant to strong acids but is less stable than polyterephthalates (PET, PBT) to benzene and methanol. PET, polyethylene terephthalate, is a hard, stiff homopolymer, whilst PBT, polybutylene terephthalate is somewhat softer. Further materials in this group include, i) thermoplastic poly (ether) ester elastomers, included in the TPE grouping, ii) amorphous polyarylates, and Hi) self-reinforced crystalline polyarylates (LCP). Polycarbonate may be blended with various styrenics (PC/ABS, PC/ASA, PC/SMA). 

Reactive blends of rubber and plastics are well known thermoplastic elastomers [132]. However, only a few blends with PBT are described. Cai and Isayev [113,114] reported the obtaining of new thermoplastic elastomers from blends of a copoly(ether-ester) (PBT- PTMO) and poly(acrylonitrile-butadiene) rubber (NBR) by the dynamic vulcanization process. These types of TPE show... 

---