Precautions for use
Properties of thermosets

The properties are measured on test specimens whose processing is standardized and, in reality, the values can be significantly different for many reasons, for example :

• presence of additives of any kind: impact modifiers, functional plasticizers, fibers or fillers, release agents, antistatic agents, regrind;

• processing conditions resulting in heterogeneous hardening, orientation of macromolecules and reinforcements, physical defects such as weld lines, etc. ;

• finishing: surface treatment, painting, assembly...

Part geometry can create notch effects or stress concentrations.

Test temperatures are 20°C or 23°C, which is not necessarily the operating temperature. For some materials, a relatively small difference in...