Six Low-Temperature Resistant Polymer Materials

Analysis and selection of six low-temperature-resistant polymer materials

Definition: polymer materials that can maintain excellent physical and chemical properties at low temperatures.

Classification: According to the source and synthesis method, they can be divided into natural low-temperature resistant polymer materials and synthetic low-temperature resistant polymer materials.

Application areas: widely used in aerospace, energy, chemical, medical and other fields

Material I: Polytetrafluoroethylene (PTFE)

Excellent low-temperature resistance, can maintain good mechanical properties at -200℃.

Excellent chemical stability, resistant to strong acids, strong alkalis, strong oxidizers and other corrosive media.

Good electrical insulation properties, suitable for electrical, electronic and other fields.

Extremely low coefficient of friction, good self-lubrication, can be used for bearings, seals and other wear-resistant parts.

Material II: Polyimide (PAI)

Excellent low-temperature resistance, able to maintain toughness at -269℃.

High strength and high modulus with excellent mechanical properties.

Good chemical resistance, can resist a variety of organic solvents and corrosive gases.

Easy to process molding, can be used to manufacture complex shapes of components

Material 3: Polyetheretherketone (PEEK)

Good low temperature resistance, can maintain high strength and toughness at -100℃.

Excellent wear resistance, suitable for the manufacture of bearings, gears and other wear-resistant parts.

Good chemical resistance, can resist a variety of organic solvents and corrosive gases.

Complex shaped parts can be manufactured by injection molding, extrusion molding and other processing methods.

Material IV: Polyphenylene Sulfide ( PPS )

Excellent low temperature resistance, can maintain high strength and toughness at -200℃.

Excellent electrical insulation properties, suitable for electrical, electronic and other fields.

Good chemical resistance, can resist a variety of organic solvents and corrosive gases.

Easy to process and mold, can be injection molding, extrusion molding and other methods to manufacture complex shapes of parts.

Material V: Liquid Crystal Polymer (LCP)

Good low-temperature resistance and can maintain good flexibility at low temperatures.

Excellent dielectric properties and low dielectric loss, suitable for high frequency electronics.

Good chemical resistance and weather resistance, can resist a variety of corrosive media and harsh environments.

Can be injection molding, extrusion and other processing methods to manufacture complex shapes of parts.

Material VI: Polyaryletherketone (PAEK)

Excellent low-temperature resistance, can maintain high strength and toughness at low temperatures.

Good chemical resistance and weather resistance, can resist a variety of corrosive media and harsh environments.

Excellent thermal stability and flame retardant properties, suitable for applications in high temperature environments.

Complex shaped parts can be manufactured by injection molding, extrusion and other processing methods.

Analysis of low temperature resistance

Changes in physical properties at low temperatures

Coefficient of Thermal Expansion: At low temperatures, the coefficient of thermal expansion of the material will change, affecting the dimensional stability and thermal stress distribution of the material.

Thermal conductivity: Under low temperature conditions, the thermal conductivity of the material will be affected, which is directly related to the heat transfer efficiency of the material in the low temperature environment.

Specific heat capacity: the specific heat capacity of the material will change at low temperature, affecting the temperature change of the material in the process of heat absorption and exothermic.

Chemical stability at low temperatures

Chemical resistance: In the low temperature environment, the resistance of the material to chemical corrosion may change, you need to choose materials with good corrosion resistance.

Aging resistance: low temperature conditions, the aging resistance of the material will be affected, the need to choose materials that can maintain long-term performance stability.

Chemical reaction activity: some materials at low temperatures may become more active, and other substances have a chemical reaction, so you need to choose a chemically stable material.

Mechanical properties at low temperatures

Strength and toughness: in the low temperature environment, the strength and toughness of the material will change, you need to choose the material with sufficient strength and toughness to meet the use of requirements

Wear resistance: under low temperature conditions, the wear resistance of the material may be affected, need to choose materials with good wear resistance to extend the service life.

Impact toughness: material impact at low temperatures, its toughness performance is particularly important, need to choose materials with good impact toughness to prevent brittle fracture