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Kinetic Analysis of A 2 + AB 2 Polymerization Approach
Author(s) -
Zhou Zhiping,
Wang Jingjing,
Yan Deyue
Publication year - 2012
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.201200054
Subject(s) - monomer , branching (polymer chemistry) , polymerization , reactivity (psychology) , kinetic energy , condensation polymer , thermodynamics , polymer chemistry , degree of polymerization , chemistry , materials science , mathematics , polymer , physics , organic chemistry , alternative medicine , pathology , quantum mechanics , medicine
Abstract The kinetic model of the co‐polycondensation with A 2 and AB 2 type monomers is developed and the analytical expressions of the various molecular parameters of the products are derived rigorously. The monomer feed ratio ( α ) of A 2 to AB 2 significantly affects the molecular parameters and the critical condition of gelation. Gelation can be avoided if α is > $1 + \sqrt {3} /2$ . At the critical state, the degree of branching decreases firstly and reaches its minimum value at about α≈0.22. Then, it increases with increasing α ‐value. In comparison with experimental results, non‐equal reactivity of the active groups should be considered.