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ÎÒÏÖÔÚ¼±ÐèPluronic P-123 (MW = 5800)ÇëÎÊÖªÇéºÃÐÄÈËÊ¿¸æËßÎÒÄÄÀï¿ÉÒÔÂòµÄµ½£¿
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Specifications
Color, APHA¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­.. 120 max.
Water, weight %¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ 0.4 max.
pH (2.5% aqueous)¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­.. 6.0 − 7.4
Cloud point (10% aqueous)¡­¡­¡­¡­¡­¡­¡­ 85 − 91¡ãC
Typical physical properties
Form¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­ Paste
Average molecular weight¡­¡­¡­¡­¡­¡­¡­... 5750
Specific gravity, 60¡ã/25¡ãC¡­¡­¡­¡­¡­¡­¡­¡­ 1.01
Viscosity, cps at 60¡ãC ¡­¡­¡­¡­¡­¡­¡­¡­¡­ 350
Pour point¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­.. 31¡ãC
Cloud point (1% aqueous)¡­¡­¡­¡­¡­¡­¡­.. 90¡ãC
Foam height (Ross Miles, 0.1% aqueous
at 50¡ãC)¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­. 45 mm
Surface tension (0.1% aqueous)¡­¡­¡­¡­¡­ 34 dynes/cm
at 25¡ãC
HLB¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­. 7 − 12
Solubility in water at 25¡ãC¡­¡­¡­¡­¡­¡­¡­¡­ >10%
Wetting, Draves Sink Time
(3-gm hook, 0.1% aqueous at 25¡ãC)¡­¡­ 35 seconds



Pluronic P-123 (BASF code) is a triblock copolymer, with a formula of HO(CH2CH2O)20(CH2CH(CH3)O)70(CH2CH2O)20H. It has around 5800 Da weight and sold in Aldrich as Poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEO-PPO0-PEO). Its behavior is similar to that of hydrocarbon surfactants, and will form micelles when placed in a selective solvent such as water. It is capable of forming both spherical and cylindrical micelles


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