Pps Types
Pps Types
Pps Types
January 2003
Regular PPS
Regular PPS is an off-white, linear polymeric material of modest molecular weight and mechanical strength. The polymer exhibits a glass transition temperature (Tg) of approximately 85C and an approximate melting temperature (Tm) of 285C. When heated above Tg, the material crystallizes rapidly. Regular PPS is primarily used in coatings.
Cured PPS
Cured PPS results from heating of PPS in the presence of oxygen (curing). Generally, the property changes that occur are a result of molecular chain extension and formation of some molecular chain branches that increase the molecular weight and result in some thermoset-like properties. Examples of these thermoset-like characteristics include good thermal stability, dimensional stability, and resistance to harsh chemical environments. However, PPS is a thermoplastic and does not suffer from many of the shortcomings of thermosets. Cured PPS performs well in coatings and injection molding compounds.
Bibliography
1. J. F. Geibel and J. E. Leland, Encyclopedia of Chemical Technology, Vol. 19, p. 904 (1996). 1
40% Glass Filled PPS 0.0% 0.001 0.01 0.1 1 Hours 10 100 1000
30 2.0% 1.5% 1.0% 0.5% 40% Glass Filled PPS 0 0 50 100 Temperature, C 150 200 0.0% 0.001
20
1.0
0.5
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