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181455

Sigma-Aldrich

Polyisobutylene

average Mw ~500,000, average Mn ~200,000 by GPC/MALLS, average Mv ~420,000

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Synonym(s):
PIB, polyisobutene
Linear Formula:
[CH2C(CH3)2]n
CAS Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

form

chunks

Quality Level

mol wt

average Mn ~200,000 by GPC/MALLS
average Mv ~420,000
average Mw ~500,000

refractive index

n20/D 1.5045

transition temp

Tg −64 °C

density

0.92 g/mL at 25 °C (lit.)

SMILES string

CC(C)=C

InChI

1S/C4H8/c1-4(2)3/h1H2,2-3H3

InChI key

VQTUBCCKSQIDNK-UHFFFAOYSA-N

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1 of 4

This Item
20239881242341584
vibrant-m

181455

Polyisobutylene

vibrant-m

202398

Poly(ethylene glycol)

vibrant-m

81242

Poly(ethylene glycol)

vibrant-m

341584

Poly(vinyl alcohol)

transition temp

Tg −64 °C

transition temp

-

transition temp

-

transition temp

-

density

0.92 g/mL at 25 °C (lit.)

density

1.128 g/mL

density

-

density

1.19-1.31 g/cm3

form

chunks

form

viscous liquid

form

solid

form

powder

mol wt

average Mn ~200,000 by GPC/MALLS

mol wt

Mn 380-420, average Mn 400

mol wt

3500-4500

mol wt

Mw 89,000-98,000

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

200

General description

Polyisobutylene is a non-toxic hydrophobic polymer that exhibits excellent flexibility at ambient temperatures, biostability, and biocompatibility. It can be used as a polymer matrix to encapsulate quantum dots and for various biomedical applications.

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves


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Yanfei Yang et al.
Journal of the American Chemical Society, 134(36), 14714-14717 (2012-08-29)
The studies described here show that a relatively low molecular weight, narrow polydispersity polyethylene (PE) wax (Polywax) can serve as a nontoxic and nonvolatile alternative to alkane solvents in monophasic catalytic organic reactions where catalysts and products are separated under
Corinne Vebert-Nardin
Chimia, 65(10), 782-786 (2011-11-08)
With this article, we wish to give an overview of our main research activities assessing the potential of a suitable polymer modification of DNA fragments to self-assemble biologically active nanostructures. Specifically, the grafting of a hydrophobic polymer segment on DNA
David Cozzens et al.
Langmuir : the ACS journal of surfaces and colloids, 27(23), 14160-14168 (2011-10-26)
The surface properties and biocompatibility of a class of thermoplastic polyurethanes (TPUs) with applications in blood-contacting medical devices have been studied. Thin films of commercial TPUs and novel polyisobutylene (PIB)-poly(tetramethylene oxide) (PTMO) TPUs were characterized by contact angle measurements, X-ray
Goy Teck Lim et al.
Biomacromolecules, 12(5), 1795-1799 (2011-04-01)
This paper is the first report of electrospinning neat polyisobutylene-based thermoplastic elastomers. Two generations of these materials are investigated: a linear poly(styrene-b-isobutylene-b-styrene) (L_SIBS) triblock copolymer and a dendritic poly(isobutylene-b-p-methylstyrene) (D_IB-MS), also a candidate for biomedical applications. Cross-polarized optical microscopy shows
M Engel et al.
The Journal of chemical physics, 132(22), 224502-224502 (2010-06-17)
We present results of in situ measurements of the filling process of polymer melts in nanopores. After accurate characterization of the empty nanopores, they are filled with the hydrophobic polyisobutylene and the hydrophilic poly-epsilon-caprolactone. The filling process is investigated in

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