Poly(dimethylsiloxane)
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Poly(dimethylsiloxane)
 

NAMES AND IDENTIFIERS OF POLYMER

POLYMER CLASS Polysiloxane
COMMON NAMESPoly(dimethylsiloxane)
STRUCTURE BASED NAME poly[oxy(dimethylsilylene)]
ACRONYMS PDMS
CAS #  
CurlySMILES Si{-}(C)(C)O{n+}
 

IDENTIFIERS OF MONOMER(S)

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
Dimethoxydimethylsiloxane & Dimethyldichlorosilane
 

Thermo-Physical Properties: Experimental / Literature Data

PROPERTYUNITVALUE / RANGEPREFERRED
Molar Volume VmmL mol-1 76.3 - 76.7 76.5
Density ρg mL-1 0.965 - 0.970.965
Solubility Parameter δMPa1/2 14.9 - 15.615.3
Molar Cohesive Energy Ecoh J mol-1 16800 - 18300 17600
Glass Transition Temperature TgK 146 - 152149
Molar Heat Capacity CpJ (mol K)-1 114.7 - 117.8116.3
Entanglement Molecular Weight Meg mol-1 6650 - 12000 
Index of Refraction nnone 1.38 - 1.401.39
 

Thermo-Physical Properties: Calculated Data

PROPERTYUNITVALUE / RANGEPREFERRED
Molecular Weight of Repeat unit g mol-1 74.0
Van-der-Waals Volume VvWmL mol-1 42.6
Molar Volume VmmL mol-1   
Density ρg mL-1   
Solubility Parameter δMPa1/2 14.5 
Molar Cohesive Energy EcohJ mol-1 15800 
Glass Transition Temperature TgK 145 - 150147.5
Molar Heat Capacity Cp J (mol K)-1   
Entanglement Molecular Weight Meg mol-1 4400 
Index of Refraction nnone 1.41 

 Last updated: June 14, 2017

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