Results 261 to 270 of about 48,944 (309)
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The Journal of Physical Chemistry B, 2008
A novel method has been developed to prepare vesicles from aqueous solutions of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer, by adding anionic surfactant sodium dodecyl sulfate (SDS) and inorganic salt NaF. As determined by TEM and dynamic light scattering (DLS) measurements, the average diameter of vesicles is ...
Shu, Chen +7 more
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A novel method has been developed to prepare vesicles from aqueous solutions of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer, by adding anionic surfactant sodium dodecyl sulfate (SDS) and inorganic salt NaF. As determined by TEM and dynamic light scattering (DLS) measurements, the average diameter of vesicles is ...
Shu, Chen +7 more
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The Journal of Physical Chemistry B, 2006
The acid effect on the aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers EO(20)PO(70)EO(20) has been investigated by transmission electron microscopy (TEM), particle size analyzer (PSA), Fourier transformed infrared, and fluorescence spectroscopy.
Bin, Yang +7 more
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The acid effect on the aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers EO(20)PO(70)EO(20) has been investigated by transmission electron microscopy (TEM), particle size analyzer (PSA), Fourier transformed infrared, and fluorescence spectroscopy.
Bin, Yang +7 more
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The Journal of Physical Chemistry B, 2005
Aqueous poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO109-PPO41-PEO109) copolymers are nonionic surfactants that self-organize to form aggregate structures with increasing temperature or concentration. We have studied two concentrations over a range of temperatures so that the copolymers are in one of three microphases: unimers ...
Christian D, Grant +3 more
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Aqueous poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO109-PPO41-PEO109) copolymers are nonionic surfactants that self-organize to form aggregate structures with increasing temperature or concentration. We have studied two concentrations over a range of temperatures so that the copolymers are in one of three microphases: unimers ...
Christian D, Grant +3 more
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Polymer, 2018
Abstract This study describes the toughening of poly(lactic acid) (PLA) through blending it with poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymers (EPE, Pluronic®) at loadings less than 10 wt%. The miscibility of EPE copolymers in PLA was examined by thermal, morphological, and rheological analysis.
Liangliang Gu +3 more
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Abstract This study describes the toughening of poly(lactic acid) (PLA) through blending it with poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymers (EPE, Pluronic®) at loadings less than 10 wt%. The miscibility of EPE copolymers in PLA was examined by thermal, morphological, and rheological analysis.
Liangliang Gu +3 more
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Advances in Colloid and Interface Science, 2006
A number of results reported on the kinetics of exchange of triblock copolymers poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide), PEO-PPO-PEO, between micelles and the intermicellar aqueous solution are reviewed and analyzed to extract the rate constants k(+) for the entry of a copolymer into a micelle and k(-) for the exit of a ...
Raoul, Zana +2 more
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A number of results reported on the kinetics of exchange of triblock copolymers poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide), PEO-PPO-PEO, between micelles and the intermicellar aqueous solution are reviewed and analyzed to extract the rate constants k(+) for the entry of a copolymer into a micelle and k(-) for the exit of a ...
Raoul, Zana +2 more
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Poly(ethylene oxide) blends with poly(ethylene oxide)/poly(dicyclohexyl itaconate) block copolymers
European Polymer Journal, 2001Abstract Blends of poly(ethylene oxide) and block copolymers poly(ethylene oxide)-block-poly(dicyclohexyl itaconate)s (PEO-b-PDCHI) with different molecular masses were prepared by solution casting from chloroform. Thermal properties and kinetics of nonisothermal melting and crystallization were studied using differential scanning calorimetry.
Aleksandra Buzarovska +3 more
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Journal of Microencapsulation, 2004
A novel method for preparing the PLGA nanospheres with hydrophilic surface has been designed and characterized. Because of good solubility of tetraglycol in water, PLGA (poly(lactide-co-glycolide)) nanospheres were formed by spraying the PLGA/tetraglycol solution into water.
B K, Kim, D, Kim, S H, Cho, S H, Yuk
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A novel method for preparing the PLGA nanospheres with hydrophilic surface has been designed and characterized. Because of good solubility of tetraglycol in water, PLGA (poly(lactide-co-glycolide)) nanospheres were formed by spraying the PLGA/tetraglycol solution into water.
B K, Kim, D, Kim, S H, Cho, S H, Yuk
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Journal of Colloid and Interface Science, 2005
Pluronic poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers are grafted with poly(vinyl pyrrolidone) by free radical polymerization of vinyl pyrrolidone with simultaneous chain transfer to the Pluronic in dioxane.
Yan, Zhang, Yeng Ming, Lam
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Pluronic poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers are grafted with poly(vinyl pyrrolidone) by free radical polymerization of vinyl pyrrolidone with simultaneous chain transfer to the Pluronic in dioxane.
Yan, Zhang, Yeng Ming, Lam
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Electrochimica Acta, 2008
Abstract The effect of LiClO 4 on the ionic transport behavior in poly(ethylene oxide) 20 –poly(propylene oxide) 70 –poly(ethylene oxide) 20 (P123) polymer electrolyte was studied. Its conductivity reaches maximum as molar ratio between ether O atoms and lithium ions [ n (O)/ n (Li)] equals 8. The results show that LiClO 4 could interact with P123
Xiao-Liang Wang +5 more
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Abstract The effect of LiClO 4 on the ionic transport behavior in poly(ethylene oxide) 20 –poly(propylene oxide) 70 –poly(ethylene oxide) 20 (P123) polymer electrolyte was studied. Its conductivity reaches maximum as molar ratio between ether O atoms and lithium ions [ n (O)/ n (Li)] equals 8. The results show that LiClO 4 could interact with P123
Xiao-Liang Wang +5 more
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Langmuir, 1994
The surface tension of aqueous solutions of seven poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) Pluronic copolymers, covering a wide range of molecular weights (3400-14600) and PPO/PEO ratios (0.19-1.79), was determined over the 10[sup [minus]5]-10% w/v concentration range, at two temperatures (25 and 35 ...
Paschalis Alexandridis +3 more
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The surface tension of aqueous solutions of seven poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-PPO-PEO) Pluronic copolymers, covering a wide range of molecular weights (3400-14600) and PPO/PEO ratios (0.19-1.79), was determined over the 10[sup [minus]5]-10% w/v concentration range, at two temperatures (25 and 35 ...
Paschalis Alexandridis +3 more
openaire +1 more source