Miscibility with positive deviation in Tg–composition relationship in blends of poly(2-vinyl pyridine)-block-poly(ethylene oxide) and poly(p-vinyl phenol)

Polymer ◽  
2006 ◽  
Vol 47 (25) ◽  
pp. 8350-8359 ◽  
Author(s):  
Li-Ting Lee ◽  
Eamor M. Woo ◽  
Sheng Shu Hou ◽  
Stephan Förster
Keyword(s):  
Ethylene Oxide ◽  
Positive Deviation ◽  
Tg Composition ◽  
Vinyl Pyridine ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Vinyl Phenol

Characterization and morphology of Novolak or poly(vinyl phenol)/poly(ethylene oxide) blends

Polymer ◽  
1997 ◽  
Vol 38 (5) ◽  
pp. 1179-1185 ◽  
Author(s):  
James J. Sotele ◽  
Valdir Soldi ◽  
Alfredo T. Nunes Pires
Keyword(s):  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Vinyl Phenol

Crystallization and Physical Ageing of Poly (2-vinyl pyridine)-b -poly(ethylene oxide) Diblock Copolymers

2010 ◽  
Vol 287 (1) ◽  
pp. 101-106 ◽  
Author(s):  
Miguel Córdova ◽  
Arnaldo T. Lorenzo ◽  
Alejandro J. Müller ◽  
Panagiota Fragouli ◽  
Hermis Iatrou ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Diblock Copolymers ◽  
Physical Ageing ◽  
Vinyl Pyridine ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Crystallization of poly(ethylene oxide) in binary blends containing poly(p-vinyl phenol)

Polymer ◽  
1995 ◽  
Vol 36 (20) ◽  
pp. 3889-3897 ◽  
Author(s):  
P. Pedrosa ◽  
J.A. Pomposo ◽  
E. Calahorra ◽  
M. Cortázar
Keyword(s):  
Ethylene Oxide ◽  
Binary Blends ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Vinyl Phenol

scholarly journals Drug Delivery System Based on pH-Sensitive Biocompatible Poly(2-vinyl pyridine)-b-poly(ethylene oxide) Nanomicelles Loaded with Curcumin and 5-Fluorouracil

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1450 ◽  
Author(s):  
Camelia-Elena Iurciuc-Tincu ◽  
Monica Stamate Cretan ◽  
Violeta Purcar ◽  
Marcel Popa ◽  
Oana Maria Daraba ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Ethylene Oxide ◽  
Ph Sensitive ◽  
Hydrophobic Drugs ◽  
Practical Utilization ◽  
Vinyl Pyridine ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Smart polymeric micelles (PMs) are of practical interest as nanocarriers for the encapsulation and controlled release of hydrophobic drugs. Two hydrophobic drugs, naturally-based curcumin (Cur) and synthetic 5-fluorouracil (5-FU), were loaded into the PMs formed by a well-defined pH-sensitive poly(2-vinyl pyridine)-b-poly(ethylene oxide) (P2VP90-b-PEO398) block copolymer. The influence of the drug loading on the micellar sizes was investigated by dynamic light scattering (DLS) and it appears that the size of the PMs increases from around 60 to 100 nm when Cur is loaded. On the contrary, the loading of the 5-FU has a smaller effect on the micellar sizes. This difference can be attributed to higher molar mass of Cur with respect to 5-FU but also to higher loading efficiency of Cur, 6.4%, compared to that of 5-FU, 5.8%. In vitro drug release was studied at pH 2, 6.8, and 7.4, and it was observed that the pH controls the release of both drugs. At pH 2, where the P2VP sequences from the “frozen-in” micellar core are protonated, the drug release efficiencies exceed 90%. Moreover, it was demonstrated, by in vitro assays, that these PMs are hemocompatible and biocompatible. Furthermore, the PMs protect the Cur against the photo-degradation, whereas the non-ionic PEO corona limits the adsorption of bovine serum albumin (BSA) protein on the surface. This study demonstrates that these pH-sensitive PMs are suitable for practical utilization as human-safe and smart, injectable drug delivery systems.

Blends of PEO in Poly(ethylene oxide)∕Poly(2-vinyl pyridine)-b-poly(ethylene oxide)

2010 ◽  
Author(s):  
E. Araneda ◽  
L. Gargallo ◽  
A. Leiva ◽  
N. Hadjichristidis ◽  
I. Mondragon ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Vinyl Pyridine ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Conductivity in Poly(Ethylene Oxide) Complexed with Mixed Alkali Metal Salts

1994 ◽  
Vol 369 ◽  
Author(s):  
Byoung-Koo Choi ◽  
Young–Wa Kim
Keyword(s):  
Transition Temperature ◽  
Ethylene Oxide ◽  
Metal Salts ◽  
Alkali Metal Salts ◽  
Positive Deviation ◽  
Anion Effect ◽  
Mixed Alkali ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Conductivity Behavior

AbstractConductivity has been measured for mixed alkali systems of LixNa1-xClO4 (PEO)n with n = 6, 16 and 40, and a mixed anion system of LiClxI1−x(PEO)16 complexes with varying concentrations of x. In the LixNa1−xClO4 (PEO)n complexes, it shows no unusual conductivity behavior. In the LiClxI1−x(PEO)16 complexes, the conductivity shows positive deviation from additivity in the mixed-anion region and the mixed-anion effect is also observed in the semicrystalline-toamorphous transition temperature.

Conductivities of Poly (Ethylene Oxide) and Poly (2-Vinyl Pyridine) Blend

1996 ◽  
Vol 33 (3) ◽  
pp. 247-259 ◽  
Author(s):  
Min-Hui Cui ◽  
Dong-Hua Cheng ◽  
Jun-She Guo ◽  
Hong-Quan Xie
Keyword(s):  
Ethylene Oxide ◽  
Vinyl Pyridine ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
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