Français
7. Balanced polycondensations
Despite a few important exceptions (diamine + acid dichloride reactions), most polycondensations are balanced. This is the case for major industrial polycondensations such as polyesterifications and polyamidifications.
7.1 Closed systems
As the low-molar-weight products formed with the polymer (water, alcohol, etc.) cannot be eliminated, it is impossible to shift the reaction equilibrium, and the reaction stops when the concentration of the species present is such that the rates of the opposing reactions are the same.
Consider the polycondensation of the stoichiometric mixture AA + BB :
The Ultimate Scientific and Technical Reference
This article is included in
Unit operations. Chemical reaction engineering
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Balanced polycondensations
Kinetics of polycondensations and polyadditions
References
The Ultimate Scientific and Technical Reference
