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Reference Tables -- Thermal Expansion Coefficients - Plastics

 

Plastic Thermal Expansion Coefficients

This chart compares the "Coefficient of linear thermal expansion" shown as a factor m/m.k in the table. All materials expand with changes in Temperature. Thermoplastics expand considerably more than metals (e.g. Carbon Steel 10.8 (10)-6 compared to UHMWPE 200 (10)-6 i.e. approximately 18 times more).

Linear thermal expansion means the product will expand in all directions and this needs to be allowed for in design calculations. The calculation is: (given factor) x 10-6 x length x change in temperature °C.

Thermal Expansion Coefficients -
Common Plastics
Plastic Type
Coefficient of Thermal Expansion
M/(MxK)
PE Polyethylene
180-200
PP Polypropylene
200
PTFE Polytetrafluoroethylene
135
PVDF Polyviylidenefluoride
130
PTFE Polytetrafluoroethylene
112 - 125
Acetal
110
Nylon
50-90
PVC Polyvinylchloride
70
PC Polycarbonate
65
PETP Polyester
60-65
PSU Polysulphone
60
PPSU Polyphenylenesulphone
55
PEEK Polyetheretherketone
25-50
PPS Polyphenylene Sulphide
50
PEI Polyetherimide
45
PAI Polyamide-imide
25-30
PBI Polybenzimidazole
25

 

 

 

 

 

 


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