Depression of Glass Transition Temperature of Polystyrene*
Blowing Agent
DTg /Unit BA  (oC/Wt%)
HCFC 142b
-4.5
HFC 134a
-4.1
CO2
-6.8
Pentane
-8.0
Depression of Glass Transition Temperature of Polypropylene*
Blowing Agent
DTg /Unit BA  (oC/Wt%)
HCFC 142b
-0.23
CO2
-1.2
*Richard Gendron and Louis Diagneault, "Rheology of Thermoplastic Foam Extrusion Process", Chapter 3, "Foam Extrusion:Principles and Practice", Edited by S.-T. Lee, Technomic Publishing Co., Inc., 2000
 
 
 

Lowering of Temperature of Crystallization of LDPE**
Blowing Agent
DTc /Unit Equilibrium Pressure  (oC/MPa)
Argon
-0.06
CO2
-0.2
R 22
-1.36
**Dey, S.K., Jacob, C. and Biesenberger, J.A., "Effect of Physical
Blowing Agents on Crystallization Temperature of Polymer Melts",
SPE Antec Tech.Papers, 40:2197-2198, 1994.

These values should be used as reference only. The author of this web page takes no responsibility regarding the accuracy of these values.
 
 

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