Dependence of the constant of the Mark-Houwink equation under theta conditions on the bulk of substituents for hydrocarbon polymers

摘要

The logarithm of the constant K-theta in the Mark-Houwink equation under theta conditions was found to be proportional to the molar volume of the substituent groups in the case of vinyl- and vinylidene-type hydrocarbon polymers. This simple empirical relation can be used to estimate K-theta for such polymers.