6533b821fe1ef96bd127ac1d
RESEARCH PRODUCT
Branched Versus Linear Polyisoprene: Flory-Huggins Interaction Parameters for their Solutions in Cyclohexane
Fatemeh SamadiBernhard A. WolfFrederik R. WurmHolger FreyJohn Eckeltsubject
chemistry.chemical_classificationPolymers and PlasticsCyclohexaneVapor pressureVapor pressure osmometryOrganic ChemistryConcentration effectPolymerFlory–Huggins solution theoryCondensed Matter Physicschemistry.chemical_compoundchemistryPolymer chemistryMaterials ChemistryMoleculeBinary systemPhysical and Theoretical Chemistrydescription
Flory-Huggins interaction parameters were determined as a function of composition for solutions of linear and of branched polyisoprene in cyclohexane (CH) at 25, 45, and 65 °C by means of vapor pressure measurements (moderate to concentrated solutions) and by vapor pressure osmometry (dilute solutions). The results demonstrate that CH is a considerably worse solvent for branched polyisoprene than for the linear analog at all temperatures and at all compositions. This observation corroborates the expectation based on a recent phenomenological approach, which accounts explicitly for the incapability of the segments of an individual polymer molecule to spread out over the entire volume of the system and for its ability to adjust its chain conformation to an altering molecular environment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-09-04 | Macromolecular Chemistry and Physics |