Solution casting vs extrusion - which leads to stronger materials?

Why do properties of some polymers depend on the way in which the specimens are prepared. For ex, the extruded Polyvinyl Acetate sheets are much stronger (at least an order of magnitude) than the solution cast films.

Polymer Characterisation

Polymer Engineering

Material Characterization

Materials Engineering

Polymer Physics

Matthias Jaunich

Federal Institute For Materials Research and Testing

I have a suggestion for a so far unacknowledged point.

If you perform solution casting your solvent has to be removed from the final film. In this process the polymer molecules are first highly mobile and can interact in the solvent but with decrease of the solvent concentration some molecules are forced in a solid condition but then they are not able to attain a favourable entanglement as their mobility is lower.