Viscoelastic materials such as polymers typically exist in two distinct states.The glass transition temperature (Tg) is often measured by DSC (Differential Scanning Calorimetry), but the DMA technique is more sensitive and yields more easily interperted data.But my polymer shows inexistence of Tg(from both DSC and DMA data), what does it imply?
Answer:
crosslinking:
" such behavior is not exhibited by crosslinked thermosetting plastics which, once cured, are set for life and will shatter rather than deform, never becoming plastic again when heated, nor melting."
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