PC (Polycarbonate)
Polycarbonate — the transparent high-impact engineering plastic. Amorphous with outstanding impact strength (virtually unbreakable at room temp), optical clarity (~90% light transmission), and good heat resistance (Tg 145-150°C). Trade names include Lexan (SABIC), Makrolon (Covestro). Used for safety glazing, machine guards, automotive headlamp lenses, CDs/DVDs, riot shields, and electronic housings.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| ISO | INT | PC | — | REF | |
| 🇺🇸 | ASTM | USA | ASTM D3935 | — | 100% |
Sources: ISO 7391, ASTM D3935
Chemical composition comparison (wt%)
Side-by-side: PC (Polycarbonate) (COMPOSITION) (ISO 7391) vs ASTM D3935 (ASTM)
| Element | PC (Polycarbonate) (COMPOSITION) | ASTM D3935 (ASTM) | Overlap |
|---|---|---|---|
| Base Polymer (Bisphenol-A Polycarbonate) | 99–99.9% | — | — |
Mechanical properties
Injection Molded
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 55–75 | MPa |
| Yield Strength | 58–65 | MPa |
| Elongation | 80–120 | % |
| Elastic Modulus | 2.2–2.4 | GPa |
| Density | 1.2–1.22 | g/cm3 |
| Glass Transition Temp (Tg) | 145–150 | °C |
| Water Absorption (24h) | 0.1–0.15 | % |
| light_transmission | 88–91 | % |
General
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 60–70 | MPa |
| Tensile Modulus | 2300–2500 | MPa |
| Elongation at Break | 80–150 | % |
| Charpy Impact (notched) | 60–80 | kJ/m² |
| Density | 1.2–1.22 | g/cm³ |
| HDT/A (1.8 MPa) | 130–140 | °C |
| Light Transmission | 88–90 | % |
| Water Absorption (24h) | 0.1–0.15 | % |
Compatibility verdict
PC (Polycarbonate) and ASTM D3935: 100% composition match
Close equivalents but NOT identical.
Related materials
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