The effect of surface tension on the sintering of polyethylene copolymers and blends in rotational molding

Polymer sintering is a formation of a homogenous melt through the coalescence of powder particles during the heating cycle of rotational molding. Although the importance of surface tension in rotational molding has been recognized as one of the most important controlling parameters, there is only limited information on the role of surface tension in rotational molding. The objective of this work was to develop an experimental technique for characterizing the surface tension of materials used in rotational molding. The effect of surface tension on sintering was investigated. This paper summarizes the results of the effect of surface tension on the rotomoldability of selected polyethylene copolymers and blends.