Prices were more evidently falling in the polyester chain on Monday, reflecting a new decline in demand for polyester fibers in China.
周一聚酯链价格明显下跌，主要是我国的聚酯纤维的需求下降。
A synthetic method for substituted amino-terminal group polyester hyperdispersants is researched and the optimum conditions for polyester chain with suitable length are chosen.
对含取代氨端基的聚酯类超分散剂的合成方法进行了研究，并为获得适当长度的聚酯链选择了最佳合成条件。
The processability of polyesters could be improved significantly after incorporating stiff chain segment through copolymerization of aliphatic polyester with aromatic liquid crystal element.
在聚酯中引入刚性链段（即将脂肪族聚酯与芳香族、液晶基元共聚合）可改善聚酯的加工性能；
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