Thermal Properties of Oligo(2-ethyl-2-oxazoline) Containing Comb and Graft Copolymers and their Aqueous Solutions

2011 ◽  
Vol 308 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Christine Weber ◽  
Andreas Krieg ◽  
Renzo M. Paulus ◽  
Hanneke M. L. Lambermont-Thijs ◽  
C. Remzi Becer ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Aqueous Solutions ◽  
Graft Copolymers

scholarly journals Discontinuities in the Thermal Properties of Water and Aqueous Solutions

Nature ◽  
1967 ◽  
Vol 214 (5084) ◽  
pp. 163-163 ◽  
Author(s):  
M. J. BLANDAMER ◽  
M. F. FOX ◽  
M. C. R. SYMONS
Keyword(s):  
Thermal Properties ◽  
Aqueous Solutions

First approach on transfection ability of novel amphiphilic water soluble degradable poly(ε-caprolactone)-g-poly(Llysine) copolymers

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Benjamin Nottelet ◽  
Julie Vendrell ◽  
Jean Coudane ◽  
Michel Vert
Keyword(s):  
Chemical Composition ◽  
Aqueous Solutions ◽  
Graft Copolymers ◽  
Water Soluble ◽  
Dna Transfection ◽  
Mcf 7

AbstractThe potential of novel amphiphilic water soluble and degradable poly(ε- caprolactone)-g-poly(L-lysine) as carriers for DNA transfection has been investigated. Two graft copolymers having the same proportion of lysine units but different structures have been synthesized following two grafting techniques. The chemical composition of these copolymers, their expected architectures and their behaviour in aqueous solutions have been studied. The benefits resulting from the use of these degradable polycationic structures as well as their ability to form polyplexes are discussed. Finally, preliminary transfection assays of MCF-7 cells by pRL-TK plasmid using poly(ε-caprolactone)-g-poly(L-lysine) copolymers as carriers are reported.

Thermal properties of some ?-amino acids in aqueous solutions

1992 ◽  
Vol 13 (5) ◽  
pp. 827-835 ◽  
Author(s):  
A. A. El-Sharkawy ◽  
A. Z. Dakroury ◽  
M. B. S. Osman
Keyword(s):  
Amino Acids ◽  
Thermal Properties ◽  
Aqueous Solutions

Adsorption of Brilliant Green from Aqueous Solutions onto Crosslinked Chitosan Graft Copolymers

2011 ◽  
Vol 39 (11) ◽  
pp. 1001-1006 ◽  
Author(s):  
Bengi Özkahraman ◽  
Ayça Bal ◽  
Işıl Acar ◽  
Gamze Güçlü
Keyword(s):  
Aqueous Solutions ◽  
Brilliant Green ◽  
Graft Copolymers ◽  
Crosslinked Chitosan

Thermal properties of aqueous solutions of polyvinylpyrrolidone in the temperature range 20?80�C

1990 ◽  
Vol 11 (3) ◽  
pp. 515-523 ◽  
Author(s):  
A. Z. Dakroury ◽  
M. B. S. Osman ◽  
A. W. A. El-Sharkawy
Keyword(s):  
Thermal Properties ◽  
Aqueous Solutions ◽  
Temperature Range

Rheological and thermal properties of agarose aqueous solutions and hydrogels

2007 ◽  
Vol 46 (3) ◽  
pp. 322-328 ◽  
Author(s):  
Emiliano Fernández ◽  
Daniel López ◽  
Carmen Mijangos ◽  
Miroslava Duskova-Smrckova ◽  
Michal Ilavsky ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Aqueous Solutions

Thermal Properties of Carboxymethylcellulose and Methyl Methacrylate Graft Copolymers

2013 ◽  
Vol 52 (9) ◽  
pp. 1242-1249 ◽  
Author(s):  
Fuqin Han ◽  
Desheng Xiong ◽  
Qingwen Wang ◽  
Bo Shao ◽  
Mo Chen
Keyword(s):  
Thermal Properties ◽  
Methyl Methacrylate ◽  
Graft Copolymers

scholarly journals Synthesis of chitosan and N-vinylimidazole graft-copolymers and the properties of their aqueous solutions

2021 ◽  
Vol 23 (4) ◽  
pp. 570-577
Author(s):  
Andrey V. Sorokin ◽  
Marina G. Kholyavka ◽  
Maria S. Lavlinskaya
Keyword(s):  
Aqueous Solutions ◽  
Ammonium Nitrate ◽  
Graft Copolymers ◽  
Gel Permeation Chromatography ◽  
Water Soluble ◽  
Ceric Ammonium Nitrate ◽  
Transmission Electron ◽  
Redox Initiator ◽  
Self Association ◽  
Stimuli Sensitive

The aim of this work is to synthesise chitosan and N-vinylimidazole graft-copolymers of various compositions and to study the properties of their aqueous solutions.Chitosan and N-vinylimidazole graft-copolymers were obtained by solution polymerisation in the presence of a ceric ammonium nitrate redox initiator. The synthesised graft copolymers were characterised by FTIR to determine their compositions and the grafted side chains of poly-N-vinylimidazole were characterised by gel permeation chromatography to determine their molecular wights and polydispersity indices. It was established that the obtained products are characterised by high values of yield and grafting efficiency and low values of the polydispersity index. It was found that when the content of the N-vinylimidazole links is above 57 wt%, the synthesised graft copolymers are water-soluble. Aqueous solutions of the obtained copolymers were characterised using dynamic light scattering, transmission electron microscopy, and laserDoppler microelectrophoresis. The study showed that macromolecules of graft copolymers in aqueous solutions have stimuli-sensitive properties with respect to the medium reaction and at a concentration above 10–2 wt% are characterised by a tendency to self-association forming core-crown aggregates, the geometry of which depends on the molecular masses of the grafted chains. Associates of macromolecules in solutions are characterised by positive values of the electrokinetic potential, the values of which also depend on the medium reaction. Thus, it was found that the ceric ammonium nitrate initiator allows obtaining chitosan and N-vinylimidazole graft-copolymers showing stimuli-sensitive properties in aqueous solutions and prone to self-association at concentrations above 10–2 wt%.

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