Results 241 to 250 of about 484,118 (295)

Surface grafting thermoresponsive PEO-PPO-PEO chains

Journal of Tissue Engineering and Regenerative Medicine, 2010
The objective of this study was to engineer surfaces comprising covalently bound polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) chains, able to coil and uncoil in aqueous media, as a function of temperature. Thermoresponsive surfaces can be used in diverse areas, such as tissue engineering and 'on-command' drug delivery.
Ram, Malal, Maya, Malal, Daniel, Cohn
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Micro and Macro Characterization of PEO‐PPO‐PEO Triblocks Hydrogels

Macromolecular Symposia, 2008
AbstractSummary:Amphiphilic poly(ethylene oxide) ‐ poly(propylene oxide) triblock copolymers are very appealing materials for biomedical application since they can be easily injected as liquid at room temperature while they produce a gel when in the body.
Fusco S, Borzacchiello A, Cohn D, Netti PA   +3 more
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Polymer-induced crystallization of inorganic salts II. PEO-CaCl2, PEO-K2CO3 and PEO-CaCO3

Journal of Crystal Growth, 1993
Abstract Structure, growth and morphology of various inorganic salts (CaCl2, K2CO3 and CaCO3) was investigated when crystallized in a polyethylene oxide (PEO) matrix. The PEO has profound influence on the crystalline phase and morphology of these salts which crystallize out when added in excess of 2:1 molar ratio.
S. Radhakrishnan, D.R. Saini
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Emulsions stabilized with PEO–PPO–PEO block copolymers and silica

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2002
The specific behavior of poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO–PPO–PEO) tri-block copolymers in aqueous solutions was studied in the presence of vinyl acetate (VAc) and colloidal silica. Several factors controlling specific interactions were investigated, the block copolymer molecular weight and hydrophilic/hydrophobic ...
Uricanu, V.I., Gosa, Kristiana-Lisette
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Nanostructure of PEO–polyurethane–PEO triblock copolymer micelles in water

Journal of Colloid and Interface Science, 2010
Novel hydrophilic triblock copolymers which form micelles in aqueous solution were studied by static and dynamic light scattering (SLS and DLS), small angle neutron scattering (SANS) and densitometry. The polymers were symmetric A-B-A block copolymers having two poly(ethylene oxide) (PEO) tail blocks and a polyurethane (PU) center segment that ...
Caba, BL, Zhang, Q, Carroll, MRJ, Woodward, RC, St Pierre, TG, Gilbert, EP, Riffle, JS, Davis, RM   +7 more
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Alginate/PEO-PPO-PEO Composite Hydrogels with Thermally-Active Plasticity

Biomacromolecules, 2013
Stimuli-responsive hydrogels with high strength and toughness have received significant interest in recent years. Here, we report thermally active composite hydrogels comprising alginate and one of two poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers.
Joseph C, White, Erika M, Saffer, Surita R, Bhatia   +2 more
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Comparison of Solubilization of Hydrocarbons in (PEO–PPO) Diblock versus (PEO–PPO–PEO) Triblock Copolymer Micelles

Journal of Colloid and Interface Science, 1996
The solubilization of hydrocarbons by micelles formed of diblock and symmetric triblock copolymers in water are compared in the framework of a mean-field theory of solubilization. The block copolymers contain poly(ethylene oxide) as the hydrophilic block and poly(propylene oxide) as the hydrophobic block and are designated as EXPYEX or EWPZ (where E ...
, Nagarajan, , Ganesh
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Effect of pharmaceuticals on thermoreversible gelation of PEO–PPO–PEO copolymers

Colloids and Surfaces B: Biointerfaces, 2008
Pluronic F127, a triblock copolymer of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO), has generated considerable interest as a drug delivery vehicle due to its ability to gel at physiological temperatures. This work examines the gelation behavior of Pluronic F127 in the presence of a series of hydrophobic pharmaceuticals, to determine ...
Sharma, PK, Reilly, MJ, Bhatia, SK, Sakhitab, N, Archambault, JD, Bhatia, SR   +5 more
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Molecular interactions between PEO–PPO–PEO and PPO–PEO–PPO triblock copolymers in aqueous solution

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2015
Abstract The molecular interactions between Pluronic F127 (PEO100–PPO65–PEO100) and Pluronic-R 25R4 (PPO19–PEO33–PPO19) in aqueous solution have been studied using micro thermal analysis and rheology, where PEO and PPO stand for poly(ethylene oxide) and poly(propylene oxide) blocks respectively through a complete thermal cycle from heating to cooling.
Sijun Liu, Lin Li
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Effect of PEO-PPO-ph-PPO-PEO and PPO-PEO-ph-PEO-PPO on the Rheological and EOR Properties of Polymer Solutions

Industrial & Engineering Chemistry Research, 2014
The rheological properties of partially hydrolyzed polyacrylamide (HPAM) and PEO-PPO-ph-PPO-PEO (BPE) or PPO-PEO-ph-PEO-PPO (BEP) block polyether solutions are investigated here. Another hydrophobically associating polymer (HMPAM) is chosen as a contrast.
Houjian Gong, Long Xu, Guiying Xu, Mingzhe Dong, Yajun Li   +4 more
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