Polymer-polymer miscibility and enthalpy relaxations

Polymer-polymer miscibility

The theoretical and practical aspects of polymer-polymer miscibility in the solid amorphous state are reviewed. The polymers include homopolymers and both random and block copolymers. Although present theoretical treatments of polymer-polymer miscibility all contain the random mixing hypothesis and are thus not applicable to mixtures that involve specific interactions between the components, mo...

A simple approach to polymer mixture miscibility

Polymeric mixtures are important materials, but the control and understanding of mixing behaviour poses problems. The original Flory-Huggins theoretical approach, using a lattice model to compute the statistical thermodynamics, provides the basic understanding of the thermodynamic processes involved but is deficient in describing most real systems, and has little or no predictive capability. We...

Thermodynamics of Enthalpy Relaxation and Hole Formation of Polymer Glasses

Probing Polymer Viscoelastic Relaxations with Temperature-Controlled Friction Force Microscopy

A quantitative method, using temperature-controlled friction force microscopy (FFM), has been developed to determine the frictional (dissipative) character of thin polymer films. With this method variations in friction are sampled over micrometer-scale regions and are reduced to “friction histograms,” yielding the distribution of frictional forces on the surface. The temperature dependence of t...

Influence of solvent/polymer interaction on miscibility of PMMA/PCL blend: thermal analysis approach