2,6-萘二甲酸二甲酯在有机溶剂中溶解度的测定与关联.pdfVIP

Chin. J. Chem. Eng., 15(2) 215…啕220(2∞7) Measurement and Con宅Iation for SoIubility of Dimethyl-2，6翩naphthalene Dicarboxylate in Organic Solvents XIAQing(夏清)* and MA Peisheng(马沛生) School of Chemical Engineering and Technology, Tìanjin University，吼叫in 300072, China 1 CTION analytícal reagent , with purity higher than 99% and 2,6-naphthalene dicarboxylate (DM-2 , were us叫without fu此her purification. rnonomer used for producing polyethyl- ate (PEN). PEN can be used in many 拙 chemical engineering, light industry, 2.2 Procedure and apparatus industry[I ,2). Fibers and films made The solubility was detennined usíng the dynamic considerably improved strength and method. A predetennined sample wa~ heated very .1K.( lOminfJ , close to the al propertíes relative to polyethylene sIowly [it was less than O PEN can be obtained by condensing solid-liquid equílibrium temperature]. The solid in the wíth ethylene glycol, and DM-2 ,6-NDC solution (sample) dissolved with an increase in tem- by the esterification of 2,6-naphthalene perature , and the temperature at which the last piece of acid with methanol[3 ,4]. However， ωdate， the solid dissolved was the solid-liquid equilibrium in the purification process[坷， only temperature of the sample. several thousand tons of P巴N per year The experimental apparatus has been described in in USA and Japan[6 ,7). To prepare det