1.Polybutylene terephthalate (PBT) is a semicrystalline thermoplastic polymer formed by a condensation process.

1.PBT是一种通过浓缩成型，一种半结晶热塑性塑料。

2.This paper introduces the preparing method, the structure, the properties and applications of poly (trimethylene terephthalate) (PTT), and it compared with PET, PBT et al. engineering plastics.

2.本介绍了聚对苯二甲酸丙二醇(PTT)法、结构、性能及应用,并和PET、PBT等工程塑料进行了比较。