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Citation: Zhou Xu-Zhang, Chen Jing-Wei, Shan Fu. Determination of Terminal OH Groups in Polymers by Differential Direct Injection Enthalpimetry[J]. Acta Physico-Chimica Sinica, ;1997, 13(01): 64-67. doi: 10.3866/PKU.WHXB19970113 shu

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

1.
Department of Chemistry,Institute of Technology,Changsha 410073

Received Date: 20 May 1996
Available Online: 15 January 1997

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 od 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 od.
- Differential direct injection enthalpimetry(DDIE),
- Polymer terminal-group determination
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