高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (6): 870.

• 论文 • 上一篇    

紫外导数光谱法在含苯乙烯链节共聚物组成测定中的应用

邱永兴, 封麟先, 俞小洁, 杨士林   

  1. 浙江大学化学系, 杭州, 310027
  • 收稿日期:1991-06-19 出版日期:1992-06-24 发布日期:1992-06-24
  • 通讯作者: 邱永兴
  • 基金资助:

    国家自然科学基金;浙江省自然科学基金

Application of Derivative UV Spectrometry to the Composition Determination of Polystyrene-based Copolymers

QIU Yong-xing, FENG Lin-xian, YU Xiao-jie, YANG Shi-lin   

  1. Department of Chemistry, Zhejiang University, Hangzhou, 310027
  • Received:1991-06-19 Online:1992-06-24 Published:1992-06-24

摘要: 人们利用苯环在260nm区域的特征紫外吸收测定共聚物中聚苯乙烯(PS)链节含量时,常假设共聚物的紫外吸收仅来源于PS链节,且共聚物和PS均聚物具有相同的摩尔吸光系数.

关键词: 紫外导数光谱法, 共聚物组成测定, 苯乙烯共聚物

Abstract: Because of the background absorbance of stearyl poly(ethylene oxide), big errors arise when normal UVspectrometry is used to determine the polystyrene content of polystyrene-g-stearyl poly (ethylene oxide) (PS-g-SPEO).In order to eliminate the interference of SPEO, we developed the first derivative UV spectrometry for the quantitative composition determination of PS-g-SPEO.It was discovered that the undesirable background absorbance mentioned above could be completely eliminated and the compositions of PS-g-SPEO copolymers determined from the first derivative spectrometry coincide quite well with the data derived from elementary analysis.The results indicate that the nrst derivative UVspectrometry is a feasible and accurate method for the composition determination of polystyrene-based copolymers.

Key words: The derivative UV spectrcmetry, Composition determination of copolymers, Polystyrene-based copolymer

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