Download citation...
Question
Asked 26 January 2014

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.
Generally speaking, the answers above are true because the question intuitively leads them. But if the question was put in another way – Does extrusion always give greater strength of the material compared to the casting technology – the answer may be in favour of the second technique. Such a result is possible if the transverse direction strength of the extruded material is compared with the isotropic properties of the same material reached by casting.