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435465

Sigma-Aldrich

Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)

average Mn ~5,800

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Synonym(s):
Pluronic® P-123, PEG-PPG-PEG
CAS Number:
9003-11-6
MDL number:
MFCD00082049
PubChem Substance ID:
24867236
NACRES:
NA.23

vapor density

>1 (vs air)

vapor pressure

<0.3 mmHg ( 20 °C)

form

solid

feed ratio

20:70:20 (EO:PO:EO)

mol wt

average Mn ~5,800

composition

PEG, 30 wt. %

refractive index

n20/D 1.465

surface tension

34 dyn/cm, 25 °C, 0.1 wt. % in H2O

viscosity

350 cP(60 °C, Brookfield)(lit.)

transition temp

Tm (DSC) 39 °C (at peak)
cloud point 90 °C (1 wt. % aqueous solution)

density

1.018 g/mL at 25 °C

HLB

7 - 9

InChI

1S/C3H6O.C2H4O/c1-3-2-4-3;1-2-3-1/h3H,2H2,1H3;1-2H2

InChI key

RVGRUAULSDPKGF-UHFFFAOYSA-N

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General description

PEG-PPG-PEG (Pluronic P123) symmetric triblock copolymer constitutes of poly(ethylene oxide)(PEO) and poly (propylene oxide) (PPO). The unique characteristic of PPO block exhibiting hydrophobicity at temperatures above 288K and solubility in water at temperatures below 288K lead to formation of micelle consisting of PEO-PPO-PEO triblock copolymers. Some studies report that the hydrophobic core contains PPO block and a hydrophilic corona is comprised of PEO block. In 30wt% aqueous solution Pluronic P123® forms a cubic gel phase.

Application

Hard and soft surface cleaners, defoamers in coatings and water treatment. Lubricant in metal working, anti-foaming aid and extender for linear and cross-linked polyesters and polyurethanes.
PEG-PPG-PEG is used in the preparation and coating of Fe-W-C(O) nanoparticles by sol gel technique. Also, employed as sacrificial templates to prepare ZnS nanospheres, nanoporous silica.

Features and Benefits

Surface active material whose properties are dependent on the hydrophilic (EO)/hydrophobic (PO) ratio. High EO content gives better o/w stabilizers.

Physical form

Terminal primary dihydroxy-functional oligomer.

Legal Information

Pluronic is a registered trademark of BASF

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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  5. What is the average molecular weight of Product No. 435465, Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)?

    While we do not test the product to determine the molecular weight, our supplier reports the average molecular weight to be 5750.

  6. What is the pour point of Product No. 435465, Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)?

    Our supplier reports the pour point of product 435465 to be 31 °C.

  7. I found an abbreviation of "HLB" on the webpage for Product No. 435465, Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)?

    HLB is an empirical expression for the relationship of the hydrophilic ("water-loving") and hydrophobic ("water-hating") groups of a surfactant. The table below lists HLB values along with typical performance properties. The higher the HLB value, the more water-soluble the surfactant.

  8. What is the water content of Product No. 435465, Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol),?

    While we do not test the product to determine the water content, our supplier reports the maximum water content allowed in Prouct No. 435465 is 0.4%.

  9. What is the physical form of Product No. 435465, Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) supposed to be?

    The specification sheet describes Product No. 435465 as a semi-solid. It looks like a paste.

  10. My question is not addressed here, how can I contact Technical Service for assistance?

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Sol-Gel Derived Fe-Rich Matrix Composites Having Precipitated WC.
Alvarez EA, et al.
Advanced Engineering Materials (2014)
Facile synthesis of hollow ZnS nanospheres in block copolymer solutions
Ma Y, et al.
Langmuir, 19(9), 4040-4042 (2003)
Hydrogen Bonding and Transfer in the Excited State, 2 (2011)
Functionalized nanoporous silicas for the immobilization of penicillin acylase
Chong M, et al.
Applied Surface Science, 237(1), 398-404 (2004)
Formation of Nanocrystalline Phases in Sol-gel Masses in the Fe-WC (O) System and Densification up to 1100? C.
Oliver CJR, et al.
Procedia Materials Science, 1, 95-103 (2012)
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Polymer Analysis in Materials Science

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