波谱学杂志 ›› 1997, Vol. 14 ›› Issue (2): 153-160.

• 研究论文 • 上一篇    下一篇

聚芳醚酮分子结构、极化及分子量的谱学研究

柯扬船1, 华士英2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 吉林大学理论化学研究所, 长春 130023
  • 收稿日期:1996-10-14 修回日期:1996-12-09 出版日期:1997-04-05 发布日期:2018-01-22
  • 基金资助:
    国家“863”重大项目及中科院化学所高分子物理联合开放实验室资助

MOLECULAR STRUCTURE,POLARIZATION AND MOLECULAR WEIGHTS FOR POLY (ARYL ETHER KETONE)S BY UV 19F NMR METHODS

Ke Yangchuan1, Hua Shiyina2   

  1. 1. Department of Chemistry, Jilin University, Changchun 130023;
    2. Institute of Theoretical Chemistry, Jilin University, Changchun 130023
  • Received:1996-10-14 Revised:1996-12-09 Online:1997-04-05 Published:2018-01-22

摘要: 聚芳醚酮在硫酸溶液中产生极化的主要因素包括质子化作用,硫酸的各种作用表明:聚合物分子结构中酮基含量或分子链刚性度增加时,硫酸的极化作用也增加,表现为UV谱红移,最大吸收峰显著增强及测得粘度与实际植偏差增大.由此,首次提出粘度法测定分子量时应考虑分子刚性等的影响.而用19F NMR法对合成的大量聚芳醚酮化合物分子量的定量研究表明,此法可由测得的端基氟含量,进而得到高聚物的数均分子量,无需校正.

关键词: 聚芳醚酮, 质子化, 分子链刚性, 分子结构, 分子量

Abstract: Protonation is one of the major factors for poly(aryl ether ketone)s (PAEDs) molecules polarized in H2SO4. Results from UV and calculation show that degree of polarization of PAEKs by H2SO4 increases with the ketone content or molecular chain regidity in polymer chains. This has been further proved by the experimental results, such as, larger λmax (UV), more intense absorption at λmax and greater deviatiou between experimental and practical viscosity values in concentrated H2SO4 than in other solvents. Based on these, we firstly suggested that the molecular rigidity is an important factor tobe considered in measuring the PAEKs molecularweights. While, 19F NMR is adopted to quantitatively measure the molecular weight of many synthesized oligomers aud polymers, which gives a number-average molecular weights without any correction.

Key words: Poly (aryl ether ketone)s, Protonation, Molecular weight, Structure and Rigidity