scholarly journals Miscibility Studies of Hydroxypropyl Cellulose/Poly(Ethylene Glycol) in Dilute Solutions and Solid State

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
K. Sudharsan Reddy ◽  
M. N. Prabhakar ◽  
P. Kumara Babu ◽  
G. Venkatesulu ◽  
U. Sajan Kumarji Rao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Ethylene Glycol ◽  
Ultrasonic Velocity ◽  
Analytical Techniques ◽  
Hydroxypropyl Cellulose ◽  
Hydroxyl Groups ◽  
Viscosity Data ◽  
Poly Ethylene Glycol ◽  
Solution Casting Method ◽  
Poly Ethylene

The miscibility of Hydroxypropyl cellulose (HPC)/poly(ethylene glycol) (PEG) blends over an extended range of concentrations in water. The viscosity, ultrasonic velocity, and refractive index of the above blend solutions have been measured at 30°C. The interaction parameters such as and μ proposed by Chee and α proposed by Sun have been obtained using the viscosity data to probe the miscibility of the polymer blends. The values indicated that the blends were miscible when HPC content is more than 40% in the blend. The obtained results have been confirmed by the ultrasonic velocity and refractive index studies. The films of the blends were prepared by solution casting method using water as a solvent. The prepared films have been characterized by analytical techniques such as FTIR, DSC, X-RD, and SEM to probe the miscibility of HPC/PEG blends. The compatibility in the above compositions may be due to the formation of H-bonding between hydroxyl groups of HPC and etheric oxygen atom of PEG molecules.

Rheological properties and phase behavior of a hydroxypropyl cellulose-poly(ethylene glycol) system

2010 ◽  
Vol 52 (2) ◽  
pp. 144-149 ◽  
Author(s):  
M. Yu. Tolstykh ◽  
V. V. Makarova ◽  
A. V. Semakov ◽  
V. G. Kulichikhin
Keyword(s):  
Ethylene Glycol ◽  
Phase Behavior ◽  
Rheological Properties ◽  
Hydroxypropyl Cellulose ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Refractive Index, Density, and Viscosity in the NaNO3+ H2O + Poly(ethylene glycol) System at Various Temperatures

2002 ◽  
Vol 47 (2) ◽  
pp. 174-178 ◽  
Author(s):  
Teófilo A. Graber ◽  
Héctor Galleguillos ◽  
Juan A. Asenjo ◽  
Barbara A. Andrews
Keyword(s):  
Refractive Index ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Biofunctionalization of Metal Surface by Immobilization of Poly(Ethylene Glycol) Terminated Amine

2007 ◽  
Vol 26-28 ◽  
pp. 765-768
Author(s):  
Yuta Tanaka ◽  
Yuh Matsuo ◽  
Haruka Saito ◽  
Yusuke Tsutsumi ◽  
Hisashi Doi ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Metal Surface ◽  
Photoelectron Spectroscopy ◽  
Blood Compatibility ◽  
Pure Titanium ◽  
Hydroxyl Groups ◽  
Commercially Pure Titanium ◽  
Cobalt Chromium ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

In many biomedical devices such as catheters and diagnostic sensors, blood compatibility is required. The best way to control this property is to prevent or drastically reduce the adsorption of proteins. Poly(ethylene glycol) terminated amine at both terminals, NH2-PEG-NH2, is immobilized on a commercially pure titanium, a 316L austenitic stainless steel, and a cobalt-chromium-molybdenum alloy with immersion or electrodeposition. Chemical bonding states at the interface and orientation of PEG molecules were characterized using X-ray photoelectron spectroscopy, glow discharge optical emission spectroscopy, and Fourie-transformed infrared spectrometer with a reflection absorption spectrometer. As a result, NH2-PEG-NH2 was immobilized onto metal surface as a U-shape mainly with stable NHO bonding in electrodeposition. In the case of electrodepostion, the concentration of active surface hydroxyl groups on surface oxide film played an important role in the immobilization.

Hydration Parameters of Aqueous Solutions of Poly(Ethylene Glycol)s by Viscosity Data

2002 ◽  
Vol 66 (2) ◽  
pp. 175-179 ◽  
Author(s):  
C Branca ◽  
S Magazù ◽  
G Maisano ◽  
P Migliardo ◽  
F Migliardo ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Viscosity Data ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Synthesis and Properties of Biodegradable ABA Triblock Copolymers of Polylactide (A) and Polyethylene Glycol (B)

2006 ◽  
Vol 11-12 ◽  
pp. 469-472 ◽  
Author(s):  
Shu Xian Shi ◽  
Yu Zheng Xia ◽  
Xiao Yan Ma ◽  
Shu Ke Jiao ◽  
Xiao Yu Li
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Ring Opening ◽  
Average Molecular Weight ◽  
Analytical Techniques ◽  
Normal Pressure ◽  
Molar Ratio ◽  
Poly Ethylene Glycol ◽  
Molar Ratios ◽  
Poly Ethylene

The triblock ABA copolymers of poly (D,L-lactide)-b-poly (ethylene glycol)-b-poly (D,L-lactide) (PDLLA-PEG-PDLLA) were synthesized by bulk ring-opening polymerization in the presence of N2 under normal pressure, using the D,L-lactide (DLLA) as monomer, hydroxyl endgroups of poly(ethylene glycol) (PEG) as initiator and the stannous octoate as the catalyst. The resulting copolymers were characterized by various analytical techniques. Effects of molar ratios of lactide to PEG and the chain length of PEG on the viscosity-average molecular weight of the copolymers, the biodegradation behaviors and hydrophilicity of the copolymers were investigated in detail. The results showed that the viscosity-average molecular weight and the contact angle of the copolymers increased with the molar ratio of lactide to PEG, but water uptake and degradability decreased.

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