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915122

Sigma-Aldrich

Poly(ethylene oxide)-block-poly(butylene oxide)

PEG average Mn 2,000, average Mn 2,000 (PBO)

Synonym(s):

PEG-PBO, PEO-PBO

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About This Item

Linear Formula:
CH3O(C2H4O)m(C4H8O)nH
UNSPSC Code:
12352119
NACRES:
NA.23
Pricing and availability is not currently available.

form

solid

Quality Level

100

mol wt

PEG average Mn 2,000 (by NMR)
PEG average Mn 2,000
average Mn 2,000 (PBO(by NMR))
average Mn 2,000 (PBO)

color

white to off-white

PDI

≤1.3 (by GPC)

storage temp.

2-8°C

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Application

Poly(ethylene oxide)-block-poly(butylene oxide) is an amphiphilic block copolymer that shows good biocompatibility. This type of polymers can self-assemble into micelles of various shapes at low concentration. It has been used as nanocarriers to solubilize and delivery hydrophobic drugs.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCM7049

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Lijiang Wang et al.
Colloids and surfaces. B, Biointerfaces, 161, 464-470 (2017-11-13)
An amphiphilic block copolymer poly(ethylene oxide)-b-poly(butylene oxide) (PEO-PBO) was evaluated as a carrier for therapeutic delivery of paclitaxel (PTX). PEO-PBO and PTX form nanoparticles (NPs) by self-assembly upon hydration. The size of these NPs was about 92.71nm and the zeta
Guilin Cheng et al.
Colloids and surfaces. B, Biointerfaces, 181, 822-829 (2019-06-28)
Biodegradable polymeric nanoparticles (NPs) have been used frequently as nanocarriers for anticancer drugs. Linoleic acid conjugated SN38 (LA-SN38)-loaded NPs (EBNPs) were developed using biodegradable poly (ethylene oxide)-poly (butylene oxide) (PEO-PBO) diblock copolymer by titration hydration method without using a toxic
Mahmoud Elsabahy et al.
Biomacromolecules, 8(7), 2250-2257 (2007-06-21)
Poly(ethylene oxide)-block-poly(styrene oxide) (PEO-b-PSO) and PEO-b-poly(butylene oxide) (PEO-b-PBO) of different chain lengths were synthesized and characterized for their self-assembling properties in water by dynamic/static light scattering, spectrofluorimetry, and transmission electron microscopy. The resulting polymeric micelles were evaluated for their ability

Questions

  1. What is the EO/BO ratio?

    1 answer

    1. The product is not tested on a lot specific basis, however, the EO/BO ratio is approximately 6.1:1.

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