Partial specific volume of poly(D-β-hydroxybutyrate) in chloroaliphatic solvents

Partial specific volumes, v ⁰₂, of poly(D -β-hydroxybutyrate), PHB, were determined by density measurements in several chloroaliphatic hydrocarbons. We observed that v ⁰₂ of PHB in tetrachloroethane is influenced only very little by temperature. This can be generalized for the group of solvents used. The experimental results are comapred with the data obtained theoretically using the concept of additivity of group contributions.