Premium
Modeling gel effect in branched polymer systems: Free‐radical solution homopolymerization of vinyl acetate
Author(s) -
Verros George D.,
Achilias Dimitris S.
Publication year - 2008
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.29252
Subject(s) - vinyl acetate , branching (polymer chemistry) , polymer , monomer , polymerization , molar mass distribution , chain transfer , radical polymerization , work (physics) , polymer chemistry , materials science , chemistry , chemical engineering , thermodynamics , copolymer , organic chemistry , physics , engineering
In this work a comprehensive mathematical framework is developed for modeling gel effect in branched polymer systems with application in the solution polymerization of vinyl acetate. This model is based on sound principles such as the free‐volume theory for polymer chains diffusion. The model predictions for monomer conversion and number‐ and weight‐average molecular weights were found to be in good agreement with published data in the literature. Moreover, the joint molecular‐weight distribution–long chain branching distribution is calculated by direct numerical integration of a large system of nonlinear ordinary integral‐differential equations describing the mass conservation of macromolecular species in a batch reactor. This allows studying the effect of process conditions such as initiator and solvent concentration on the product quality. It is believed that this work might contribute to a more rational design of polymerization reactors. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009