P 129 Chapter 6. Transition Temperature
ex> polystyrene (Mn=10000, Tg=88° C ) Polystyrene (Mn>50000, Tg=100 °C ) c) crosslinking increases the Tg of a polymer. Large shifts of Tg with increased cross-linking are observed, (ex) epoxy or phenolic thermosetting resin. d) The free volume of the polymer Vf. - free volume is the volume of the polymer mass not actually occupied by the
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