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Index of SubsTech articles
to Thermoplastics
to Properties of polymers
(submitted by the website administration)
| Thermoplastic | ||||
| Polyamide-imide (PAI), bearing grade | ||||
| Property | Value in metric unit | Value in US unit | ||
| Density | 1.46 *10³ | kg/m³ | 91 | lb/ft³ |
|---|---|---|---|---|
| Water absorption, 24hrs, 20ºC | 0.4 | % | 0.4 | % |
| Tensile modulus | 5.5 | GPa | 800 | ksi |
| Flexural modulus | 5.8 | GPa | 835 | ksi |
| Compressive modulus | 6.6 | GPa | 950 | ksi |
| Tensile strength | 103 | MPa | 15000 | psi |
| Flexural strength | 159 | MPa | 23000 | psi |
| Compressive strength | 152 | MPa | 22000 | psi |
| Elongation | 6 | % | 6 | % |
| Hardness, Rockwell | 107 | RM | 107 | RM |
| IZOD impact strength, notched | 75 | J/m | 1.4 | ft-lbs/in |
| Thermal expansion (20 ºC) | 2.5*10-5 | ºCˉ¹ | 1.4*10-5 | in/(in* ºF) |
| Thermal conductivity | 0.53 | W/(m*K) | 3.7 | BTU*in/(hr*ft²*ºF) |
| Glass transition temperature | 275 | ºC | 527 | ºF |
| Maximum work temperature | 260 | ºC | 00 | ºF |
| Dielectric constant, 1MHz | 6.0 | - | 6.0 | - |
Applications: bearings, bushings, pen balls, seal rings, bearing cages, pump parts, aerospace components, piston rings, engine trransmission parts, valve seats.
http://www.virginia.edu/bohr/mse209/class.htm
http://bioe.eng.utoledo.edu/adms_staffs/akkus/BIO2200_notes/polymers.pdf
http://users.encs.concordia.ca/~woodadam/GCH6101/Important%20polymers.pdf
http://www.eng.uwo.ca/es021/ES021a_2006/Lecture%20Notes/Chap%2014-15%20-%20Polymers.pdf
http://ocw.mit.edu/NR/rdonlyres/Mechanical-Engineering/2-008Spring2004/5EB113FF-BB3B-4047-98B6-3152548F9D45/0/04_polymer_1_6_f.pdf
http://courses.washington.edu/courseli/me355/Lectures/Sp2006/lecture19-20%20Polymer,%20Polymer%20Processing,%20composites.ppt
http://www.engr.siu.edu/staff2/deruntz/IT208/Chapter%2018%20Manufacturing%20with%20Plastics.ppt
