To increase the melt strength and increase high shear thinning of a polyester composition, a polar chain terminator that contains a nonionic group or an ionic group neutralized with a counterion is added at a level of 0.05 to 20 mole percent. Optionally, up to 2.0 mole percent of a tri-functional or greater branching agent is added to the polyester composition. Optionally, up to 30 mole percent of a polar midchain difunctional monomer that contains a nonionic group or an ionic group neutralized with a counterion is added. The polyester composition is based on 100 mole percent diacid component and 100 mole percent glycol component.
为提高聚酯组合物的熔体强度和高剪切稀化性,可添加极性链
终止剂,其含有非离子基团或与反离子中和的离子基团,添加量为 0.05 至 20 摩尔%。可选地,在聚酯组合物中加入高达 2.0 摩尔%的三官能度或更高的支化剂。可选择加入不超过 30 摩尔%的极性中链双官能团单体,该单体含有非离子基团或与反离子中和的离子基团。聚酯组合物基于 100 摩尔百分率的二元酸组分和 100 摩尔百分率的
乙二醇组分。