Abstract
The kinetics of hyperbranched A~2~ + B~3~ systems is discussed theoretically with respect to the development of the 7 different structural units, the degree of branching, DB, and the monomer sequences considering the adjacent groups of a structural unit. For A~2~ + B~3~ systems, the comonomer ratio, the relative rate constants and the process conditions have an influence on the resulting structure as shown by numerical simulations. With increasing A:B ratios f~A/B~, the degree of branching will be increased. Also the relative reaction rate constants have a strong impact on the distribution of structural units, especially when the reaction rate constants for the pathway of the B~3~ monomer are changed. On the other hand, differences in the reaction rate constants for the pathway of the A~2~ monomer do not have any influence on the degree of branching. The simulation indicates that slow addition of either both monomers or just the B~3~ monomer has the strongest effect on the resulting DB. In all cases, the conversion is a critical issue to obtain high molecular weight products.
Degree of branching (DB) versus conversion of A‐functionalities (p~A~) for various monomer compositions.
imageDegree of branching (DB) versus conversion of A‐functionalities (p~A~) for various monomer compositions.