181455
Aldrich

Polyisobutylene

average M_w ~500,000, average M_n ~200,000 by GPC/MALLS, average M_v ~420,000

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Molecular Formula

[CH₂C(CH₃)₂]_n

CAS Number

9003-27-4

MDL number

MFCD00084436

PubChem Substance ID

24850935

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Properties

form

slab/chunk

mol wt

average M_n ~200,000 by GPC/MALLS

average M_v ~420,000

average M_w ~500,000

contains

500 ppm BHT as stabilizer

refractive index

n20/D 1.5045

transition temp

T_g −76 °C

T_m 1.5 °C

density

0.92 g/mL at 25 °C(lit.)

References

reference

Aldrich MSDS 1, 1519:D / Corp MSDS 1 (2), 2878:B / FT-IR 2 (3), 4657:B / FT-IR 2 (3), 4657:C / FT-IR 2 (3), 4658:A / FT-IR 1 (2), 1162:B / FT-IR 1 (2), 1162:C / FT-IR 1 (2), 1163:A / IR-Spectra (3), 1572:D / IR-Spectra (3), 1572:E / IR-Spectra (3), 1572:G / IR-Spectra (2), 1342:G / IR-Spectra (2), 1342:H / IR-Spectra (2), 1343:B / RegBook 1 (2), 3151:N / Structure Index 1, 497:A:7

Safety

WGK Germany

RTECS

UD1010000