Trapping of Reactive Intermediates to Study Reaction Mechanisms in Cellulose Chemistry

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• 作者：Thomas Rosenau ; Antje Potthast ; Paul Kosma
• 关键词：Cellulose ; Trapping ; Reactive intermediates ; Reaction mechanism
• 刊名：Advances in Polymer Science
• 出版年：2006
• 出版时间：2006
• 年：2006
• 卷：205
• 期：1
• 页码：153-197
• 全文大小：1,055 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1436-5030

文摘

Reaction with specific scavenger agents, so-called trapping, is a direct way to prove the occurrence of reactive intermediates in a reaction system, and thus to elucidate the underlying reaction mechanisms. After an introduction on chemical intermediates, chemical trapping and the peculiarities of trapping methodology in the presence of cellulose, four chapters from cellulose chemistry were selected to illustrate how trapping can be used to determine reactive intermediates, to prove the occurrence of reactive intermediates in the respective reaction system, and to finally help establish the reaction mechanism. The four topics are: radical and ionic intermediates in Lyocell dopes that cause cellulose degradation, the chemistry of cellulose in DMAc/LiCl solutions, aging of alkali cellulose under steeping conditions, and cellulose degradation during carbanilation in dimethyl sulfoxide (DMSO) mixtures.