【摘要】 以气相色谱法测定聚苯酯降解物CH3COOH,在分离度、色谱峰形或数据重复性方面不能满足定量测定要求。以高效液相色谱法在254 nm时测定POB降解溶液中的对羟基苯甲酸,方法的灵敏度(LOD 9.95×10-12mol/L)、重现性(RSD小于0.6%)、回收率(87.88%~107.51%)、线性相关性(线性相关系数0.99以上)都满足定量测定要求;根据聚苯酯降解液中的p-HBA测得所合成POB聚合度为27.6,测定POB基复合材料中POB的质量分数时发现,以不同配方合成的复合材料中POB的质量分数都与理论值有较大偏离,这一现象可能由合成聚苯酯时单体升华损失所致。更多还原

【Abstract】 Low resolution,asymmetric peaks or poor reproducibility were discovered while CH3COOH degraded from POB was analyzed by GC.When p-HBA in the degradation product was analyzed by High Performance Liquid Chromatography(HPLC),good linearities(Linear correlation coefficient above 0.99),high recoveries(87.88%~107.51%),excellent reproducibilities(RSD below 0.6%) as well as low LOD(9.95×10-12 mol/L) can be achieved at 254 nm.The polymerization degree of POB was determined as 27.6 by this method.The mass fraction of POB in its composites was found to be lower than the calculated values,which maybe due to the sublimation of p-ABA.更多还原