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Dynamic mechanical studies of thermal aging in poly(vinyl chloride)
Author(s) -
Roche E. J.
Publication year - 1983
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760230704
Subject(s) - vinyl chloride , materials science , differential scanning calorimetry , glass transition , dynamic mechanical analysis , endothermic process , annealing (glass) , dynamic modulus , quenching (fluorescence) , composite material , polyvinyl chloride , thermal , polymer chemistry , thermodynamics , polymer , chemistry , fluorescence , copolymer , adsorption , physics , quantum mechanics
The effects of thermal aging on the dynamic mechanical properties of rigid poly(vinyl chloride) (PVC) and chlorinated poly(vinyl chloride) (CPVC) are examined in the glass transition ( T g ) and β transition ( T β ) regions. PVC, when quenched through T g and then annealed at 40°C, exhibits a sub‐ T g peak in the loss modulus function. The position of the peak moves to higher temperatures with increasing annealing time. The effect is analogous to sub‐ T g endothermic peaks previously observed by differential scanning calorimetry (DSC). A sub‐ T β peak in the tan δ or the loss modulus functions can be produced by quenching through T β . The effect of heating rate on the sub‐ T β peak is explored.