聚[2,2’-(1,4-苯撑)-6,6’-双(3-苯基喹噁啉)](PPQ)是一种耐高温材料,其合成方法、机械性能及应用方面的研究已有很多报道,但是有关其溶液性质和分子形态的研究还甚少。我们用小角激光散射法研究了PPQ的稀溶液性质。本文报道PPQ在溶液中的缔合现象。实验 PPQ试样由本系孙猛提供。以体积比为3比2的四氯乙烷-苯酚混合溶剂为良溶剂,正庚烷为沉淀剂对样品进行分级,所得狭分布样品按分子量由大到小排列,依次记为PPQ-1,PPQ-2和PPQ-3。 Poly (2,2 ’- (1,4-phenylene) -6,6’-bis (3-phenylquinoxaline)] (PPQ) is a high temperature resistant material, its synthesis, mechanical properties and applications Many studies have been reported, but little is known about the nature of the solution and the molecular morphology. We studied the dilute solution properties of PPQ by small angle laser light scattering. This article reports the association of PPQ in solution. Experimental PPQ samples provided by the Department of Sun Meng. The sample was classified by using tetrachloroethane-phenol mixed solvent with a volume ratio of 3: 2 as a good solvent and n-heptane as a precipitating agent. The narrow distribution samples were arranged in descending order of molecular weight, followed by PPQ-1, PPQ-2 and PPQ-3.