PI
polymerPolyimide (PI) is a high-performance engineering polymer characterized by exceptional thermal stability, mechanical strength, and chemical resistance across a wide temperature range. It is widely used in aerospace, automotive, electronics, and industrial applications where conventional polymers fail, including jet engine components, printed circuit boards, seals, bearings, and insulators. Engineers select PI when durability at elevated temperatures, dimensional stability, and resistance to oils and solvents are critical requirements that justify its higher cost relative to commodity plastics.
aerospace engine componentshigh-temperature electrical insulationbearing cages and sealsflexible printed circuitsautomotive under-hood partschemical-resistant coatings
Compliance & Regulations
?UL 94?Conflict Free?RoHS?REACH?TSCA?Prop 65
Property OverviewNormalized to typical max values
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 19.94 | GPa | — | ||
Compressive Strength(σc) | 14.96 | MPa | — | ||
Elongation at Break(εf) | 15.28 | - | — | ||
Flexural Strength (MOR)(σf) | 122.9 | MPa | — | ||
Hardness (Vickers)(HV) | 891.2 | HV | — | ||
Poisson's Ratio(ν) | 0.2400 | - | — | ||
Shear Modulus(G) | 13.11 | GPa | — | ||
Ultimate Tensile Strength(σUTS) | 111.7 | MPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | 536.7 | K | — | ||
Melting Point / Solidus(Tm) | 518.3 | K | — | ||
Maximum Service Temperature(Tmax) | 779.4 | K | — | ||
Thermal Conductivity(k) | 0.6848 | W/(m·K) | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 4.150 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 2.594 | eV | — | ||
| ↳ | 0.8240 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.1102 | eV/atom | — | ||
Formation Energy(ΔHf) | 0.07243 | eV/atom | — | ||
Refractive Index(n) | 1.681 | - | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Safety & Biocompatibility
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.