435465

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

average M_n ~5,800

• Synonyme(s) : Pluronic^® P-123, PEG-PPG-PEG
• Numéro CAS: 9003-11-6
• Numéro MDL: MFCD00082049
• Code UNSPSC : 12352104
• ID de substance PubChem : 24867236
• Nomenclature NACRES : NA.23

Propriétés

• Densité de vapeur: >1 (vs air)
• Pression de vapeur: <0.3 mmHg ( 20 °C)
• Forme: solid
• Ratio alimentaire: 20:70:20 (EO:PO:EO)
• Poids mol.: average M_n ~5,800
• Composition: PEG, 30 wt. %
• Indice de réfraction: n20/D 1.465
• Tension de surface: 34 dyn/cm, 25 °C, 0.1 wt. % in H₂O
• Viscosité: 350 cP(60 °C, Brookfield)(lit.)
• Température de transition: T_m (DSC) 39 °C (at peak); cloud point 90 °C (1 wt. % aqueous solution)
• Densité: 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
• Clé InChI: RVGRUAULSDPKGF-UHFFFAOYSA-N

Description

Description générale

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.

Caractéristiques et avantages

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

Forme physique

Terminal primary dihydroxy-functional oligomer.

Informations légales

Pluronic is a registered trademark of BASF

Informations sur la sécurité

• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 1
• Équipement de protection individuelle: Eyeshields, Gloves, type N95 (US)