scholarly journals Analysis of residual crosslinking agent content in UV cross-linked poly(ethylene oxide) hydrogels for dermatological application by gas chromatography

2016 ◽  
Vol 6 (5) ◽  
pp. 307-312 ◽  
Author(s):  
Rachel Shet Hui Wong ◽  
Mark Ashton ◽  
Kalliopi Dodou
Keyword(s):  
Gas Chromatography ◽  
Ethylene Oxide ◽  
Crosslinking Agent ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Melting Behavior of Poly(ethylene oxide)—Polystyrene—Poly(ethylene oxide) Triblock Copolymer by Gas Chromatography

1976 ◽  
Vol 8 (5) ◽  
pp. 471-473 ◽  
Author(s):  
Kikuo Shoji ◽  
Kanehiro Nakamura ◽  
Ryuichi Endo ◽  
Masatami Takeda
Keyword(s):  
Gas Chromatography ◽  
Ethylene Oxide ◽  
Triblock Copolymer ◽  
Melting Behavior ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Gamma Irradiated Synthesis of Polyethylene Oxide (PEO)-N, N-Dimethyacrylamide (DMA) Hydrogel and Chitosan

2019 ◽  
pp. 1-14
Author(s):  
Sony Ahmed ◽  
Milon Bhoumik ◽  
Shafiul Islam ◽  
Saurav Shuvo
Keyword(s):  
Ethylene Oxide ◽  
Crosslinking Agent ◽  
Chemical Properties ◽  
Swelling Ratio ◽  
Elongation At Break ◽  
Gel Fraction ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Chitosan Hydrogels ◽  
Gamma Irradiated

Hydrogel which can swell rapidly and retain large volumes of water in their swollen structure have shown a significant contribution for wound healing. More recently, hydrogel synthesized by radiation polymerization and grafting have been reported which did not require any crosslinking agent. In this study, Crosslinked Poly ethylene oxide (PEO) / N, N-dimethylacrylamide (DMA) hydrogel containing chitosan for wound dressing has been prepared by gamma radiation technique. Chitosan solutions with different concentration (0.5-1.5%,10%) have been blended with 5% aqueous solution of Poly ethylene oxide, N, N-dimethylacrylamide and irradiated at the doses 5-20 kGy by gamma rays. The copolymers were characterized by Fourier transform infra-red spectroscopy and their physical chemical properties of hydrogels were evaluated in terms of gel fraction, swelling ratio, elongation at break and mechanical properties (tensile Strength). It was found that under maximum condition of incorporation 1% chitosan with irradiation dose of 10 kGy, Poly ethylene oxide - N, N-dimethylacrylamide -chitosan hydrogels with high gel fraction (80%), swelling ratio (4152%) and elongation at break (110%) were obtained. 

Miscibility of poly(vinyl chloride)/poly(ethylene oxide) blends—II. An inverse gas chromatography study

1993 ◽  
Vol 29 (11) ◽  
pp. 1483-1487 ◽  
Author(s):  
A. Etxeberria ◽  
J.M. Elorza ◽  
J.J. Iruin ◽  
C. Marco ◽  
M.A. Gómez ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Ethylene Oxide ◽  
Vinyl Chloride ◽  
Inverse Gas Chromatography ◽  
Poly Vinyl Chloride ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

The Structure of Radiation Cross-Linked Poly (ethylene oxide) Gels

1971 ◽  
Vol 29 ◽  
pp. 76-77
Author(s):  
C. E. Cluthe ◽  
G. G. Cocks
Keyword(s):  
Molecular Weight ◽  
Ethylene Oxide ◽  
Parallel Plate ◽  
Average Molecular Weight ◽  
Radical Reaction ◽  
Free Radical Reaction ◽  
Nitrogen Gas ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Initial Viscosity

Aqueous solutions of a 1 weight-per cent poly (ethylene oxide) (PEO) were degassed under vacuum, transferred to a parallel plate viscometer under a nitrogen gas blanket, and exposed to Co60 gamma radiation. The Co60 source was rated at 4000 curies, and the dose ratewas 3.8x105 rads/hr. The poly (ethylene oxide) employed in the irradiations had an initial viscosity average molecular weight of 2.1 x 106.The solutions were gelled by a free radical reaction with dosages ranging from 5x104 rads to 4.8x106 rads.

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