435465

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

average M_n ~5,800

• Sinonimo/i: Pluronic^® P-123, PEG-PPG-PEG
• Numero CAS: 9003-11-6
• Numero MDL: MFCD00082049
• Codice UNSPSC: 12352104
• ID PubChem: 24867236
• NACRES: NA.23

Proprietà

• Densità del vapore: >1 (vs air)
• Livello qualitativo: 100
• Tensione di vapore: <0.3 mmHg ( 20 °C)
• Forma fisica: solid
• Rapporto d’alimentazione: 20:70:20 (EO:PO:EO)
• PM: average M_n ~5,800
• Composizione: PEG, 30 wt. %
• Indice di rifrazione: n20/D 1.465
• Tensione superficiale: 34 dyn/cm, 25 °C, 0.1 wt. % in H₂O
• Viscosità: 350 cP(60 °C, Brookfield)(lit.)
• Temp. transizione: T_m (DSC) 39 °C (at peak); cloud point 90 °C (1 wt. % aqueous solution)
• Densità: 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; RVGRUAULSDPKGF-UHFFFAOYSA-N

Descrizione

Descrizione generale

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.

Applicazioni

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.

Caratteristiche e vantaggi

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

Stato fisico

Terminal primary dihydroxy-functional oligomer.

Note legali

Pluronic is a registered trademark of BASF

Informazioni sulla sicurezza

• Codice della classe di stoccaggio: 11 - Combustible Solids
• Classe di pericolosità dell'acqua (WGK): WGK 1
• Dispositivi di protezione individuale: Eyeshields, Gloves, type N95 (US)