Polybutylene terephthalate chemistry

In a molded polymer blend, the surface morphology results from variations in composition between the surface and the bulk. Static SIMS was used to semiquan-titatively provide information on the surface chemistry on a polycarbonate (PC)/polybutylene terephthalate (PBT) blend. Samples of pure PC, pure PBT, and PC/PBT blends of known composition were prepared and analyzed using static SIMS. Fn ment peaks characteristic of the PC and PBT materials were identified. By measuring the SIMS intensities of these characteristic peaks from the PC/PBT blends, a typical working curve between secondary ion intensity and polymer blend composition was determined. A static SIMS analysis of the extruded surface of a blended polymer was performed. The peak intensities could then be compared with the known samples in the working curve to provide information about the relative amounts of PC and PBT on the actual surface. 

Reinforced PET- Thermoplastic polyesters based on polyethylene terephthalate. Closely related in terms of chemistry, properties, and areas of application to reinforced polybutylene terephthalate (PBT) compounds. Key distinguishing features are higher strength properties and higher use temperatures. 

Butanediol is the main intermediate to tetrahydrofuran and y-butyro-lactone, but is finding increasing use in the production of polybutylene terephthalate, an engineering plastic. Production in the U.S.A. (over 200 kt per annum) and Europe (approx. lOOkt per annum) is mainly via Reppe chemistry, based on acetylene ... 

Deak, G. and J.P. Kennedy, Copolyesters containing polyisobutylene soft segments and polybutylene terephthalate as the crystalline segments. Journal of Macromolecular Science - Pure and Applied Chemistry, 33(SUPPL. 7/8) p. 439.1996. 

Gijsman, P., Meijers, G., Vitarelli, G. Comparison of the UV-degradation chemistry of polypropylene, polyethylene, polyamide 6 and polybutylene terephthalate. Polym. Degrad. Stab. 65, 433 1 (1999)... 

---