Secondary structural motions in polycarbonate. II. Identification of the motions and their relation to impact strength

摘要: Abstract The impact strength of polycarbonate, exhibited over a wide temperature range, is due to the existence overlapping dynamic mechanical loss peaks in this same range. A dielectric analysis motions causing these indicates they impart by providing large number degrees motional freedom which energy an may be dissipated. magnitude directly related dissipation factor measured under conditions.