| POLYMER CLASS | Polysiloxane |
| COMMON NAMES | Poly(dimethylsiloxane) |
| STRUCTURE BASED NAME | poly[oxy(dimethylsilylene)] |
| ACRONYMS | PDMS |
| CAS # | |
| CurlySMILES | Si{-}(C)(C)O{n+} |
| CAS # | 75-78-5, 214-189-4 |
| COMMON NAMES | Dimethyldichlorosilane, Dimethoxydimethylsilane |
| SMILES | C[Si](C)(Cl)Cl, CO[Si](C)(C)OC |
| Std. InChI | 1S/C2H6Cl2Si/c1-5(2,3)4/h1-2H3, 1S/C4H12O2Si/c1-5-7(3,4)6-2/h1-4H3 |
| Std. InChIKey | LIKFHECYJZWXFJ-UHFFFAOYSA-N, JJQZDUKDJDQPMQ-UHFFFAOYSA-N |
| STRUCTURE |
|
| PROPERTY | UNIT | VALUE / RANGE | PREFERRED |
| Molar Volume Vm | mL mol-1 | 76.3 - 76.7 | 76.5 |
| Density ρ | g mL-1 | 0.965 - 0.97 | 0.965 |
| Solubility Parameter δ | MPa1/2 | 14.9 - 15.6 | 15.3 |
| Molar Cohesive Energy Ecoh | J mol-1 | 16800 - 18300 | 17600 |
| Glass Transition Temperature Tg | K | 146 - 152 | 149 |
| Molar Heat Capacity Cp | J (mol K)-1 | 114.7 - 117.8 | 116.3 |
| Entanglement Molecular Weight Me | g mol-1 | 6650 - 12000 | |
| Index of Refraction n | none | 1.38 - 1.40 | 1.39 |
| PROPERTY | UNIT | VALUE / RANGE | PREFERRED |
| Molecular Weight of Repeat unit | g mol-1 | 74.0 | |
| Van-der-Waals Volume VvW | mL mol-1 | 42.6 | |
| Molar Volume Vm | mL mol-1 | ||
| Density ρ | g mL-1 | ||
| Solubility Parameter δ | MPa1/2 | 14.5 | |
| Molar Cohesive Energy Ecoh | J mol-1 | 15800 | |
| Glass Transition Temperature Tg | K | 145 - 150 | 147.5 |
| Molar Heat Capacity Cp | J (mol K)-1 | ||
| Entanglement Molecular Weight Me | g mol-1 | ||
| Index of Refraction n | none | 1.41 |
Last updated: June 14, 2017