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首页> 外文期刊>Journal of Applied Polymer Science >Estimation and Characterization of Polyester Oligomers
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Estimation and Characterization of Polyester Oligomers

机译：聚酯低聚物的估计和表征

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摘要

Oligomers were obtained from polyester samples by solvent extraction and dissolution methods.Dioxane,chloroform,and chlorobenzene were used for the extraction method,whereas dimethyl formanide and phenol:tetrachloroethane (1 : 1 mixture) were used for the dissolution method.The oligomers were separated and analyzed by a thin-layer chromatographic technique.It was observed that extraction with chloroform and dissolution with phenol :tetrachloroethane gave higher oligomer contents.Also,the values were higher for as-spun fibers.Thin-layer chromatographic analysis showed that in all the cases lower oligomers were obtained with a maximum of the cyclic trimer,whereas the efficencies of solvents varide for removal of higher oligomers.
机译：通过溶剂萃取和溶解方法从聚酯样品中获得低聚物，萃取方法为二恶烷，氯仿和氯苯，而硬脂酸二甲酯和苯酚：四氯乙烷（1：1混合物）用于溶解方法。观察到用氯仿萃取和用苯酚：四氯乙烷溶解可得到较高的低聚物含量，初纺纤维的值也较高。薄层色谱分析表明在所有情况下，获得的低聚物具有最大的环状三聚体，而去除高聚物的效率各不相同。

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