6533b836fe1ef96bd12a07b8

RESEARCH PRODUCT

Reduction of the interfacial tension between ‘immiscible’ polymers: to which phase one should add a compatibilizer

I WelgeBernhard A. Wolf

subject

PolypropyleneMaterials sciencePolymers and PlasticsOrganic ChemistryOxideConcentration effectThermodynamicsSurface tensionPartition coefficientchemistry.chemical_compoundchemistryPhase (matter)Polymer chemistryMaterials ChemistryCopolymerPolymer blend

description

Abstract The reduction of interfacial tension σ between polyethylene oxide (PEO) and polypropylene oxide (PPO) by either a triblock copolymer EO–PO–EO or a diblock copolymer styrene–EO was studied by means of the pendant drop method from 70 to 120°C. Time independent data correspond to stationary states and do not represent equilibrium information. The addition of the compatibilizer to the PPO phase is approximately twice as efficient as the addition to the PEO phase for both block copolymers. Knowing the concentration dependence of σ for one of the coexisting phases it is possible to forecast the effects resulting from the addition of the other phase by means of model considerations based on the partition coefficient of the additive and the ratio of the viscosities of the coexisting phases.

yearjournalcountryeditionlanguage
2001-04-01Polymer
https://doi.org/10.1016/s0032-3861(00)00781-3