聚酯是由多元醇和多元羧酸聚合而成的一类聚合物的总称,一般可分为不饱和聚酯和饱和聚酯。目前已大规模生产的工程塑料级饱和聚酯主要包括聚对苯二甲酸二甲丁二醇酯(PBT)、聚对苯二甲酸丙二醇酯(PTT)、聚对苯二甲酸乙二醇酯(PET)、聚甲苯二甲酸环己烷二甲醇酯(PCT)及共聚聚酯等品种。PBT是由对苯二甲酸(PTA)或对苯二甲酸酯(DMT)与1,4-丁二醇(BDO)聚合而成的饱和聚酯 Polyester is a general term for a class of polymers polymerized from polyhydric alcohols and polycarboxylic acids. It can be divided into unsaturated polyesters and saturated polyesters. At present, large-scale production of engineering plastic grade saturated polyesters mainly include polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), polyethylene terephthalate ( PET), polycyclohexane dimethanol terephthalate (PCT) and copolyester. PBT is a saturated polyester polymerized from terephthalic acid (PTA) or terephthalate (DMT) and 1,4-butanediol (BDO)