Poly(isobutene)
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Poly(isobutene)
 

NAMES AND IDENTIFIERS OF POLYMER

POLYMER CLASS Polyalkene (Polyolefin)
COMMON NAMESPoly(isobutene), Poly(isobutylene), Butyl rubber
STRUCTURE BASED NAME Poly(1,1-dimethylethylene), Poly(2-methylprop-1-ene)
ACRONYMS PIB
CAS # 9003-27-4
CurlySMILES C{-}C{n+}(C)(C)
 

IDENTIFIERS OF MONOMER(S)

CAS # 68606-25-7
COMMON NAMESIsobutene
SMILES CC(=C)C
Std. InChI 1S/C4H8/c1-4(2)3/h1H2,2-3H3
Std. InChIKey VQTUBCCKSQIDNK-UHFFFAOYSA-N
STRUCTURE
Isobutene
 

Thermo-Physical Properties: Experimental / Literature Data

PROPERTYUNITVALUE / RANGEPREFERRED
Molar Volume VmmL mol-161.4 - 66.863.8
Density ρg mL-1 0.84 - 0.910.88
Solubility Parameter δMPa1/2 14.4 - 17.715.8
Molar Cohesive Energy EcohJ mol-1 13400 - 2030016300
Glass Transition Temperature TgK 195 - 208202
Molar Heat Capacity CpJ (mol K)-1109.5 - 110.5110
Entanglement Molecular Weight Meg mol-15900 - 105007950
Index of Refraction nnone1.505 - 1.511.51
 

Thermo-Physical Properties: Calculated Data

PROPERTYUNITVALUE / RANGEPREFERRED
Molecular Weight of Repeat unitg mol-1 56.11
Van-der-Waals Volume VvWmL mol-1 41.12
Molar Volume VmmL mol-162.2 - 66.664.7
Density ρg mL-1 0.84 - 0.900.87
Solubility Parameter δMPa1/2 15.1 - 15.915.4
Molar Cohesive Energy EcohJ mol-1 14200 - 1650015400
Glass Transition Temperature TgK 202
Molar Heat Capacity CpJ (mol K)-1112 - 117114
Entanglement Molecular Weight Meg mol-16900 - 82007600
Index of Refraction nnone1.47 - 1.511.49

  Last updated: June 5, 2016

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