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Kinetic evaluation of hyperbranched A(2)+B-3 polycondensation reactions

机译：超支化A（2）+ B-3缩聚反应的动力学评估

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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. [References: 53]
机译：理论上讨论了7个不同结构单元的发展，支化度，DB和考虑结构单元相邻基团的单体序列的超支化A（2）+ B-3系统的动力学。对于A（2）+ B-3系统，共聚单体比率，相对速率常数和工艺条件对所得结构有影响，如数值模拟所示。随着A：B比率f（A / B）的增加，分支度将增加。同样，相对反应速率常数对结构单元的分布有很大的影响，特别是当改变B-3单体途径的反应速率常数时。另一方面，A（2）单体途径的反应速率常数的差异对支化度没有任何影响。模拟表明两种单体或仅B-3单体的缓慢添加对所得DB的影响最大。在所有情况下，转化都是获得高分子量产物的关键问题。 [参考：53]

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