181498
Polyisobutylene
average Mw ~4,200,000, average Mn ~3,100,000 by GPC/MALLS, average Mv ~4,700,000
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About This Item
Linear Formula:
[CH2C(CH3)2]n
CAS Number:
UNSPSC Code:
12162002
PubChem Substance ID:
MDL number:
InChI
1S/C4H8/c1-4(2)3/h1H2,2-3H3
SMILES string
CC(C)=C
InChI key
VQTUBCCKSQIDNK-UHFFFAOYSA-N
form
slab/chunk
mol wt
average Mn ~3,100,000 by GPC/MALLS, average Mv ~4,700,000, average Mw ~4,200,000
contains
500 ppm BHT as stabilizer
refractive index
n20/D 1.51
density
0.92 g/mL at 25 °C (lit.)
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General description
Polyisobutylene (PIB) is an elastomer and plasticizer.It exhibits good gas permeability, thermal, oxidative and chemical stability. Films of PIB can be synthesized by RF sputtering, whereas branched PIB can be synthesized from 4-(1-hydroxy-1-methylethyl)styrene -co-styrene (HMESt-co-St) as inimer.
Application
PIB may be used to prepare polymers blends with isotactic polypropylene (iPP).
Storage Class
10 - Combustible liquids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves
Regulatory Information
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Morphology, crystallization and melting behaviour of films of isotactic polypropylene blended with ethylene-propylene copolymers and polyisobutylene,
Martuscelli E, et al.
Polymer, 23(2), 229-237 (1982)
Dynamic rheological properties of polyisobutylene
Dunlop AN and Williams HL
Journal of Applied Polymer Science, 20, 193-206 (1976)
Ivan Yu Eremchev et al.
Physical chemistry chemical physics : PCCP, 13(5), 1843-1848 (2010-12-25)
Numerous experiments have shown that the low-temperature dynamics of a wide variety of disordered solids is qualitatively universal. However, most of these results were obtained with ensemble-averaging techniques which hide the local parameters of the dynamic processes. We used single-molecule
Hong Seok Choi et al.
Langmuir : the ACS journal of surfaces and colloids, 28(1), 849-854 (2011-11-25)
The optical properties of polymeric materials, such as transmission loss and the thermo-optic coefficient, determine their utility in numerous applications, ranging from nanotechnology to the automotive and aerospace industries. However, because of the wide variation in the physical properties of
C Götz et al.
Journal of the mechanical behavior of biomedical materials, 10, 206-215 (2012-04-24)
This study examines the morphology, thermal, quasi-static and long-term dynamic creep properties of one linear and three arborescent polyisobutylene-based block copolymers (L_SIBS31, D_IBS16, D_IBS27 and D_IBS33). Silicone rubber, a common biopolymer, was considered as a benchmark material for comparison. A
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