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MilliporeSigma

181455

Sigma-Aldrich

Polyisobutylene

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

Synonym(s):

PIB, polyisobutene

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Estimated to ship onJuly 09, 2025Details


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100 G
$201.00
250 G
$363.00

About This Item

Linear Formula:
[CH2C(CH3)2]n
CAS Number:
MDL number:
UNSPSC Code:
12162002
PubChem Substance ID:
NACRES:
NA.23

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$201.00


Estimated to ship onJuly 09, 2025Details


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Technical Service
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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
1814632023981546966
refractive index

n20/D 1.5045

refractive index

n20/D 1.51

refractive index

n20/D 1.466

refractive index

-

form

chunks

form

solid (or Chunk(s))

form

viscous liquid

form

-

density

0.92 g/mL at 25 °C (lit.)

density

0.92 g/mL at 25 °C (lit.)

density

1.128 g/mL

density

0.92 g/mL at 25 °C (lit.)

mol wt

average Mn ~200,000 by GPC/MALLS

mol wt

average Mn ~600,000 by GPC/MALLS, average Mv ~1,200,000, average Mw ~1,000,000

mol wt

Mn 380-420, average Mn 400

mol wt

Mw ~37000

transition temp

Tg −64 °C

transition temp

-

transition temp

-

transition temp

-

Quality Level

100

Quality Level

100

Quality Level

200

Quality Level

-

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.

Application

  • The use of polyisobutylene-based polymers in ophthalmology: Discusses the application of polyisobutylene-based polymers in ophthalmologic devices, highlighting its potential in biomedical applications (L Pinchuk, 2022).
  • Synthesis of a polyisobutylene-tagged fac-Ir (ppy) 3 complex and its application as recyclable visible-light photocatalyst in a continuous flow process: Presents a novel use of polyisobutylene as a support for photocatalysts, enhancing recyclability and efficiency in light-driven chemical reactions (D Rackl, P Kreitmeier, O Reiser, 2016).
  • Polyisobutylene-based thermoplastic elastomers for manufacturing polymeric heart valve leaflets: In vitro and in vivo results: Explores the use of polyisobutylene-based elastomers in the production of heart valve leaflets, assessing their physical properties and compatibility (E Ovcharenko et al., 2019).
  • Polyisobutylene—new opportunities for medical applications: Reviews the potential of polyisobutylene in various medical applications, focusing on its properties and benefits for healthcare materials (D Barczikai et al., 2021).
  • Homogeneous and heterogeneous catalysts for the synthesis of highly reactive polyisobutylene: discovery, development and perspectives: Discusses advancements in catalyst technology for producing high-reactivity polyisobutylene, crucial for high-performance materials (IV Vasilenko, SV Kostjuk, 2021).

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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Questions

1–5 of 5 Questions  
  1. I would like to ask whether this product is in a gel form or a solid block.

    1 answer
    1. This product is supplied as clear blocks or slabs.

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  3. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  4. I would like to purchase the Poly Isobutylene (100 gm).However from the product sheet I came to know that it is in solid form .Please explain how we can convert into coating films (dry form ) or liquid forms .

    1 answer
    1. The melting point of this item is not determined. However, according to research this product should melt around 54-56C. Literature indicates to me that this product is often solubilized in something like toluene prior to being used as a coating (Maltanava, H.; Shiman, D.; Ovodok, E.; Svito, I.; Makarevich, M.; Kostjuk, S.; Poznyak, S.; Aniskevich, A. Polymer Coatings Based on Polyisobutylene, Polystyrene and Poly(styrene-block-isobutylene-block-styrene) for Effective Protection of MXenes. Coatings 2022, 12, 1477. https://doi.org/10.3390/coatings12101477).

      Helpful?

  5. Hi, does this come as a powder or suspension?

    1 answer
    1. This item is a solid, the typical physical form is 'chunks', as mentioned in the PROPERTIES section of the product page.

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