芳香环状低聚物组分分布与单体结构关系的研究

Studies on Relationship Between Component Distribution of Aryl Cyclic Oligomers and Its Monomer's Structure

根据Jacoson-Stockmayer(J-S)环化理论,应用基质辅助激光解吸离子化飞行时间质谱(MAIDL-TOFMS),对一系列芳香环状低聚物组分分布进行分析,研究了芳香环状低聚物的组分分布与单体结构的关系,结果表明,在芳香聚酯、聚膦酸酯及芳香聚醚环状低聚物系列中,Inc_n与Inn呈良好的线性关系,符合J-S理论分布,在环状聚酯及聚膦酸酯系列中,低聚物的组分分布受双酚单体的中心键角影响,单体的中心键角在100°～120°之间,其中心键角愈小,γ值愈大,而在聚醚系列中,在固定一种单体的前提下,环化物的组分分布受另一单体键角的影响与环状聚酯和聚膦酸酯相一致。

Based upon Jacoson-Stockmayer theory, matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) was used to analyze the component distribution of a series of cyclic aryl oligomers. The relationship between the component distribution of cyclic aryl oligomers and the monomer structure was investigated. The results indicated the distribution of cyclic aryl oligomers could be accorded with J-S theory well. The effect of the bond angle of bisphenol monomer on the distribution of cyclic ester and phosphonate oligomers showed that the value of γ in J-S theory decreased with the bond angle increasing from 100° to 120°. On the premise of a constant monomer, the distribution rule of cyclic aryl ether oligomers affected by the structure of another monomer was consistent with cyclic ester and phosphonate oligomers.