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VPO法测定低聚物的数均分子量要求样品纯度高.紫外光谱法是精确测定低浓度抗氧剂含量的一种简便方法,常用于测定分子量?n=2800～3000商品HLPB中的抗氧剂2.6-二特丁基-4-甲基苯酚含量.利用其测得数据,校正用VPO测定的数均分子量,则不需预先纯化聚合物试样.
VPO method for the determination of the number average molecular weight of the oligomer sample requires high purity.Ultraviolet spectrometry is a simple and accurate method for the determination of low concentrations of antioxidants and is often used to determine the molecular weight of n = 2800-3000 HLPB commercial antioxidants 2.6-Di-tert-butyl-4-methylphenol Content Using the data measured, the number average molecular weight determined by VPO was corrected, without the need to pre-purify the polymer sample.