| POLYMER CLASS | Polyamide |
| COMMON NAMES | Kevlar, Twaron, Polyaramide, Aramide, Poly(p-phenylene terephthalamide), Poly[(p-phenylenediamine)-alt-(terephthalic acid)] |
| STRUCTURE BASED NAME | Poly(imino-1,4-phenyleneiminoterephthaloyl) |
| ACRONYMS | PPTA |
| CAS # | 24938-64-5 |
| CurlySMILES | N{-}c1ccc(cc1)NC(=O)c1ccc(cc1)C{n+}(=O) |
| CAS # | 106-50-3.100-20-9 |
| COMMON NAMES | p-Phenylenediamine & Terephthalic acid |
| SMILES | Nc1ccc(cc1)N.ClC(=O)c1ccc(cc1)C(=O)Cl |
| Std. InChI | 1S/C6H8N2/c7-5-1-2-6(8)4-3-5/h1-4H,7-8H2.1S/C8H4Cl2O2/c9-7(11)5-1-2-6(4-3-5)8(10)12/h1-4H |
| Std. InChIKey | CBCKQZAAMUWICA-UHFFFAOYSA-N.LXEJRKJRKIFVNY-UHFFFAOYSA-N |
| STRUCTURE |
|
| PROPERTY | UNIT | VALUE / RANGE | PREFERRED |
| Molar Volume Vm | mL mol-1 | 164.3 - 165.6a | > 165.6 |
| Density ρ | g mL-1 | 1.44 - 1.45a | < 1.44 |
| Solubility Parameter δ | MPa1/2 | 23.0 - 29.0 | 26.0 |
| Molar Cohesive Energy Ecoh | J mol-1 | 98600 - 156800 | 127700 |
| Glass Transition Temperature Tg | K | 580 - 620 | 600 |
| Molar Heat Capacity Cp | J (mol K)-1 | ||
| Entanglement Molecular Weight Me | g mol-1 | ||
| Index of Refraction n | none |
| PROPERTY | UNIT | VALUE / RANGE | PREFERRED |
| Molecular Weight of Repeat unit | g mol-1 | 238.25 | |
| Van-der-Waals Volume VvW | mL mol-1 | 126.01 | |
| Molar Volume Vm | mL mol-1 | 180.8 - 193.6 | 186.5 |
| Density ρ | g mL-1 | 1.23 - 1.32 | 1.28 |
| Solubility Parameter δ | MPa1/2 | 25.8 - 30.1 | 28.6 |
| Molar Cohesive Energy Ecoh | J mol-1 | 128700 - 167300 | 152800 |
| Glass Transition Temperature Tg | K | 588 - 601 677 | 595 |
| Molar Heat Capacity Cp | J (mol K)-1 | 249 - 275 | 257 |
| Entanglement Molecular Weight Me | g mol-1 | 1900 - 3800 | 2900 |
| Index of Refraction n | none | 1.60 - 1.76 | 1.65 |
Last updated: January 8, 2016