Results 221 to 230 of about 26,926 (263)

Micellar Dynamics in Aqueous Solutions of PEO−PPO−PEO Block Copolymers

Langmuir, 1997
The dynamics of poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide) micelle rearrangements were studied using iodine laser temperature jump experiments with light-scattering detection. Two relaxation processes were detected:  the first, fast one was accompanied by an increase in scattered light intensity, while the second, slow process was ...
Goldmints, I., Holzwarth, J., Smith, K., Hatton, T.   +3 more
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Effect of PEO molecular weight on the miscibility and dynamics in epoxy/PEO blends

The European Physical Journal E, 2015
In this work, the effect of poly(ethylene oxide) (PEO) molecular weight in blends of epoxy (ER) and PEO on the miscibility, inter-chain weak interactions and local dynamics were systematically investigated by multi-frequency temperature modulation DSC and solid-state NMR techniques.
Shoudong, Lu, Rongchun, Zhang, Xiaoliang, Wang, Pingchuan, Sun, Weifeng, Lv, Qingjie, Liu, Ninghong, Jia   +6 more
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Characterization of a PEO-PPO-PEO block copolymer system

2008
The investigated EO27-PO39-EO27 triblock copolymer, Pluronics P-85, is a nonionic surface-active agent which has a monomeric molecular weight of 4600, of which 500% corresponds to the PEO component. P-85 exist in complex states of aggregation in aqueous solution.
K. Schillén, O. Glatter, W. Brown
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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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Phase Behavior and Lubricity of Aqueous PEO-PPO-PEO and PPO-PEO-PPO Triblock Copolymer Solutions

Tribology Transactions, 2016
ABSTRACTAqueous triblock copolymer solutions are potential low-cost, eco-friendly lubricants. However, as a solution, their phase changes with copolymer concentration and solution temperature, raising the question, “Does the phase change affect the formation of adsorbed layer and the lubrication performance?” This article studies the copolymer solution
Taheri, Reza, Kosasih, Buyung, Zhu, Hongtao, Tieu, Anh Kiet   +3 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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Aggregation Behaviors of PEO-PPO-ph-PPO-PEO and PPO-PEO-ph-PEO-PPO at an Air/Water Interface: Experimental Study and Molecular Dynamics Simulation

Langmuir, 2012
The block polyethers PEO-PPO-ph-PPO-PEO (BPE) and PPO-PEO-ph-PEO-PPO (BEP) are synthesized by anionic polymerization using bisphenol A as initiator. Compared with Pluronic P123, the aggregation behaviors of BPE and BEP at an air/water interface are investigated by the surface tension and dilational viscoelasticity.
Houjian, Gong, Guiying, Xu, Teng, Liu, Long, Xu, Xueru, Zhai, Jian, Zhang, Xin, Lv   +6 more
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Interaction between PEO–PPO–PEO Copolymers and a Hexapeptide in Aqueous Solutions

Langmuir, 2012
Interaction between PEO-PPO-PEO copolymers and a hexapeptide, growth hormone releasing peptide-6 (GHRP-6), was investigated by NMR to study the potential use of the copolymers in peptide drug delivery. (1)H NMR and nuclear Overhauser effect spectroscopy (NOESY) measurements determined that PO methyl protons interacted with methyl protons of the Ala ...
Lianwei, Jia, Chen, Guo, Junfeng, Xiang, Ning, Wang, Liangrong, Yang, Yalin, Tang, Huizhou, Liu   +6 more
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PEO Flocculation with Phenolic Microparticles

Journal of Colloid and Interface Science, 2002
Polystyrene latex and precipitated calcium carbonate (PCC) with and without dextran sulfate pretreatment were flocculated by the consecutive addition of high-molecular-weight poly(ethylene oxide) and a novel composite latex microparticle consisting of a polystyrene core and a poly(p-vinylphenol) shell. Good flocculation of polystyrene latex and PCC was
Chen, Lu, Robert, Pelton
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Adsorption of PEO–PPO–PEO triblock copolymers on a gold surface

Journal of the Taiwan Institute of Chemical Engineers, 2011
Abstract Water-soluble triblock copolymers of Poly(ethylene oxide) and Poly(propylene oxide) (PEO n –PPO m –PEO n ) are nonionic amphiphilic macromolecules, commercially available under the names of Pluronics and Poloxamers. Recently interest has been focused on studying their roles in reducing nonspecific protein adsorption and cell adhesion ...
Yu-Bing Liou, Ruey-Yug Tsay
openaire   +1 more source