Ultra high molecule weight polyethylene (UHMWPE) was modified by filling with hollow glass beads in an attempt to improve its heat resistance. The effects of varying the added amount and surface treatment of the glass beads on the Vicat softening point were studied. The properties of the composites were investigated and a possible mechanism for the differences between the properties of the composites and the pristine polymer is suggested. It was found that a web of glass bead/UHMWPE/coupling agent is formed and plays a significant role in improving the heat resistance of the composites. The web also increases the entanglement density in the amorphous region and thereby has the effect of increasing breaking elongation and impact strength. In addition, appropriate amounts of glass beads can increase the crystallinity of UHMWPE via a process of heterogenous nucleation.
MA YunZhe;HUANG Li.
Heat resistance of ultra high molecular weight polyethylene composites modified by hollow glass bead[J]. Journal of Beijing University of Chemical Technology, 2010, 37(2): 49-53
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