435465
Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol)
average Mn ~5,800
Synonym(s):
Nanopatterning, Pluronic® P-123, block-copolymers, PEG-PPG-PEG
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About This Item
CAS Number:
UNSPSC Code:
12352104
PubChem Substance ID:
NACRES:
NA.23
MDL number:
vapor density
>1 (vs air)
Quality Level
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
SMILES string
O2C(C2)C.O1CC1
InChI
1S/C3H6O.C2H4O/c1-3-2-4-3;1-2-3-1/h3H,2H2,1H3;1-2H2
InChI key
RVGRUAULSDPKGF-UHFFFAOYSA-N
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
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Storage Class
11 - Combustible Solids
wgk
WGK 1
ppe
Eyeshields, Gloves, type N95 (US)
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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)
Facile synthesis of hollow ZnS nanospheres in block copolymer solutions
Ma Y, et al.
Langmuir, 19(9), 4040-4042 (2003)
Sol-Gel Derived Fe-Rich Matrix Composites Having Precipitated WC.
Alvarez EA, et al.
Advanced Engineering Materials (2014)