435465

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

average M_n ~5,800

• Synonim(y): Pluronic^® P-123, PEG-PPG-PEG
• Numer CAS: 9003-11-6
• Numer MDL: MFCD00082049
• Kod UNSPSC: 12352104
• Identyfikator substancji w PubChem: 24867236
• NACRES: NA.23

Właściwości

• gęstość pary: >1 (vs air)
• ciśnienie pary: <0.3 mmHg ( 20 °C)
• Postać: solid
• proporcje: 20:70:20 (EO:PO:EO)
• masa cząsteczkowa: average M_n ~5,800
• skład: PEG, 30 wt. %
• współczynnik refrakcji: n20/D 1.465
• napięcie powierzchniowe: 34 dyn/cm, 25 °C, 0.1 wt. % in H₂O
• lepkość: 350 cP(60 °C, Brookfield)(lit.)
• temp. przejścia: T_m (DSC) 39 °C (at peak); cloud point 90 °C (1 wt. % aqueous solution)
• gęstość: 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
• Klucz InChI: RVGRUAULSDPKGF-UHFFFAOYSA-N

Opis

Opis ogólny

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.

Zastosowanie

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.

Cechy i korzyści

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

Postać fizyczna

Terminal primary dihydroxy-functional oligomer.

Informacje prawne

Pluronic is a registered trademark of BASF

Informacja o środkach bezpieczeństwa

• Kod klasy składowania: 11 - Combustible Solids
• Klasa zagrożenia wodnego (WGK): WGK 1
• Środki ochrony indywidualnej: Eyeshields, Gloves, type N95 (US)