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
|
Link to this article：Plastic Thermal Expansion Coefficients
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