Thermostability

The thermostable adjective indicates what is stable at high temperature. It gets busy to indicate a material or a molecule which is not degraded at a temperature whereas at this same temperature, the similar materials or molecules are denatured or destroyed (they are Thermolabile S).

Thermostable polymer

Polymeric S, whose plastic , are degraded in general at relatively low temperatures: they flowing, found, break up (undergo a Thermolyse), burn… One can seldom use a polymer beyond 100 °C.

There exist stable polymers remaining at relatively high temperatures. The developed first was the Teflon ® (Dupont), which remains stable until approximately 320 °C.

; Example of thermostable polymers

  • Teflon ® (Dupont): approx. 320 °C;
  • Kevlar (Dupont): approx. 400 °C;
  • Nomex (Dupont): approx. 400 °C;
  • KermelTech ® (Kermel): approx. 400 °C (vitreous transition to 340 °C, degradation beyond 450 °C).
One in the manners of making polymers thermostable consists to create connections reinforcing the chemical bonds, like hydrogen bonds, by the presence of atoms of Oxygène, Azote or Fluor in the polymeric chain.

Thermostable biological molecules (proteins, DNA)

Thermonucléase S (Désoxyribonucléase)

Toxin S: Endotoxine S

Thermostable freezing

Example: the Alginate S (food freezing, code E400 with E405).

See too

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