The glass transition temperature of polystyrene
- J. Rieger
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A round robin test was performed to determine the reliability of values for the glass transition temperatureT g as determined by DTA on polymers. Ten different instruments were involved. The test material was high molecular weight polystyrene. Values forT g (midpoint) were reported in the range 107°C±2 K. The respective heat flow curves differed considerably in shape. In the literature aT g of 100°C is often given for polystyrene. The discrepancy between this value and the value of 107°C found in the round robin test is due to three differences: the thermal history of the sample, the evaluation of the heat flow curves, and the effect of finite sample size.
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- The glass transition temperature of polystyrene
Journal of thermal analysis
Volume 46, Issue 3-4 , pp 965-972
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- Kluwer Academic Publishers
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- glass transition temperature
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- J. Rieger (1)
- Author Affiliations
- 1. Polymer Research Division, BASF AG, D-67056, Ludwigshafen, Germany