物理化学学报 >> 1997, Vol. 13 >> Issue (01): 64-67.doi: 10.3866/PKU.WHXB19970113

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差示直接注入热函法测定聚合物的端羟值

周旭章,陈景蔚,单复   

  1. 国防科学技术大学五系,长沙 410073
  • 收稿日期:1996-05-20 修回日期:1996-09-06 发布日期:1997-01-15
  • 通讯作者: 周旭章

Determination of Terminal OH Groups in Polymers by Differential Direct Injection Enthalpimetry

Zhou Xu-Zhang,Chen Jing-Wei,Shan Fu   

  1. Department of Chemistry,Institute of Technology,Changsha 410073
  • Received:1996-05-20 Revised:1996-09-06 Published:1997-01-15
  • Contact: Zhou Xu-Zhang

关键词: 直接注入热函法(DDIE), 聚合物端羟基测定

Abstract:

A thermometric method in which the heat of reaction is used as a quantitative measure of terminal OH groups in polymers has been in routine use. We use DDIE to determine the terminal OH groups in polyglycol and telechelic polybutadienes by the acetylation reaction of perchloric acid with acetic anhydride. The result is in good agreement with that of chemical titration, thus showing high reliability of DDIE in polymer end-group determination.
The method takes less than 5 minutes to carry out. The advantages of DDIE are simplicity, speed and also a repeatability is good.

Key words: Differential direct injection enthalpimetry(DDIE), Polymer terminal-group determination