Introduction and application of Fluroelastomers
Fluorine rubber refers to a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of the main chain or side chain. It not only has good mechanical properties, but also has high resistance to high temperature, oil and various chemicals. Its characteristics and comprehensive performance are particularly excellent, so it has a wide range of applications, especially in the production of special sealing products. It is indispensable in modern aviation, missiles, rockets, aerospace and other cutting-edge science and technology and other industries (such as automobiles) Material.
Key Properties and Characteristics
| Durometer (Shore A) | 55-90 | Tear Strength | Fair |
| Specific Gravity (Polymer) | 1.85 | Flame Retardent Properties | Excellent |
| Tensile Strength Max-psi (Mpa) | 2000 | Weathering Characteristics | Excellent |
| -13.8 | |||
| Low Temperature Brittle Point (C/F) | 1 | Oxidation Resistance | Excellent |
| Resilience | Fair to Good | Ozone Resistance | Excellent |
| Compression Set | Fair to Good | Oil Resistance | Excellent |
| Heat Aging | Excellent | Acid Resistance | Good to Excellent |
| Abrasion Resistance | Good | Resistance to Alkali Substances | Poor to Good |
| Key Characteristics | |||
| Heat and chemical resistance. | |||
| Further Comments | |||
| This is a family of rubbers designed for very high temperature operation. They can operate continuously somewhat in excess of 200°C depending on the grade, and intermittently to temperatures as high as 300°C. They have outstanding resistance to chemical attack by oxidation, acids and fuels. They have good oil resistance. However, at the high operating temperatures they are weak, so that any design must provide adequate support against applied forces. They have limited resistance to steam, hot water, methanol, and other highly polar fluids. They are attacked by amines, strong alkalis and many freons. There are standard and special grades and the latter can be designed to have special properties such as improved low-temperature resistance. | |||
Different types of Fluroelastomers
| Items | M227 | M728 | M928 | Test Methods | ||||
| Fluorine content(mass%) | 66 | 66 | 66 | |||||
| density(g/cc) | 1.78~1.84 | 1.78~1.84 | 1.78~1.84 | ASTM D297 | ||||
| Mooney viscosity | 20~45 | 60~85 | ≥100 | ASTM D1646 ML 1+10 at 121°C | ||||
| Moisture content (%) | <0.15 | <0.15 | <0.15 | ASTM D 5668 | ||||
| Vulcanization properties | ||||||||
| T10(s) | <110 | <90 | <70 | ASTM D5289 | ||||
| T90(s) | <240 | <210 | <180 | ASTM D5289 | ||||
| Mechanical behavior | ||||||||
| Tensile strength (MPa) | 14 | 14.5 | 15 | ASTM D412 Method A | ||||
| 100% modulus | 5 | 5.2 | 5.4 | STM D412 Method A | ||||
| Elongation at break (%) | 190 | 180 | 170 | ASTM D412 Method A | ||||
| Tear strength (KN/m) | 21 | 22 | 22 | ASTM D624 | ||||
| Hardness, Shore A | 70～80 | 70～80 | 70～80 | ASTM D2240,TypeA | ||||
| Compression set | 16 | 15 | 15 | ASTM D395,Test B 70 hours at 200℃ | ||||
| hot air aging | ISO 188 After Dry Heat Aging;70 hours at 230℃ | |||||||
| Tensile strength change rate (%) | -10 | -8 | -5 | ASTM D412 Method A | ||||
| Change rate of elongation at break (%) | -8 | -6 | -6 | ASTM D412 Method A | ||||
| Hardness change, Shore A | -1 | -1 | -1 | ASTM D2240,TypeA | ||||
| Thermal properties | ||||||||
| TR10(℃) | -17 | -17 | -17 | ASTM D1329 | ||||
| Embrittlement temperature (℃) | -30 | -30 | -30 | ASTM D2137 | ||||
| Chemical resistance properties | ||||||||
| Liquid resistance | 3# standard oil | |||||||
| Volume change rate (%) | 2 | 2 | 1 | ASTM D471 150℃ 72hours | ||||
| Mass change rate (%) | 1 | 1 | 1 | ASTM D471 150℃ 72hours | ||||
Application of Fluroelastomers
Dynamic seal Expansion joint High voltage cable
Hoses and hoses Extrusion processing aids High performance seals
Wearable device
Package and transportation of Fluroelastomers
Package: 1KG/25kg/
Transportation: by courier/ by air/ by sea
Related Articles of Fluroelastomers
Mechanical behavior of fluoroelastomer considering long term ageing
NK Sinha, R Mukhopadhyay, B Raj - Nuclear engineering and design, 2013 - Elsevier
… Bispheniol cured, Viton A-401C based fluroelastomers like IG3 derive a large part of their
RT strength from ionic attractions which disappear reversibly during ET as illustrated by Fig. 1a…
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