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Hydroxypropylcellulose-graft-poly(N-isopropylacrylamide)—novel water-soluble copolymer with double thermoresponsivity

Motyl M., Drozd D., Kamiński K., Bielska D., Karewicz A., Szczubiałka K., Nowakowska M.

Polimery

2013

T. 58, nr 9

696--702

Acopolymer showing two cloud points was obtained by grafting poly(N-isopropylacrylamide) (PNIPAM) onto hydroxypropylcellulose (HPC). The structure of the polymer was verified using 1H NMR, FT-IR, GPC, and elemental analysis. The values of cloud points could be changed by increasing ionic strength and as a result of the interactions with surfactants.

Metodą naszczepienia poli(N-izopropyloakryloamidu) (PNIPAM) na hydroksypropylocelulozie (HPC) otrzymano kopolimer wykazujący dwa punkty zmętnienia. Strukturę polimeru potwierdzono wykorzystując badania metodami 1H NMR, FT-IR, GPC oraz analizy elementarnej. Wartości temperatury w punktach zmętnienia ulegały zmianie w wyniku siły jonowej oraz w wyniku oddziaływań z surfaktantami.

Mehaniceskaa aktivacia zidkofaznyh sistem na osnove gidroksipropilcellulozy

Alekseeva O., Rozkova O., Rodionova A., Padohin V.

Czasopismo Techniczne. Mechanika

2008

R. 105, z. 2-M

3-8

In this paper, authors have studied the effect of the mechanics treatments parameters at high speed shifting conditions on the structural and rheological properties of aqueous solutions of hydroxypropylcellulose, polyvinyl alcohol and their mixtures.

Cellulose Derivatives : Organic Crystals and Liquid Crystals : Used the Longest, Known the Least

Kryszewski M., Wojciechowski P., Okrasa L., Kozanecki M., Ulański J.

Polish Journal of Chemistry

2002

Vol. 76 / nr 2-3

187-200

The basic characteristic of cellulose chemical constitution and its crystalline structure are presented. The LC-phases of cellulose derivatives were investigated by a series of techniques, which made possible to establish the specificity of chiral nematic mesomorphic structure and its transitions in correlation with intermolecular interactions of the side chains. The anisotropic composites, formed by stabilization of mesomorphic phase of LC-cellulose derivatives by photopolymerization of lyotropic solvent (acrylic acid), are characterized by thermooptical analysis, dielectric spectroscopy, dynamic mechanical measurements, WAXS and Raman spectroscopy. These techniques show that the structure of the vinyl polymer within the composite is dependent on the oriented mesophase. The vinyl polymer phase in the glassy state counteracts the relaxation of LC-cellulose derivatives leading to its stabilization and reorientation in the heating and cooling cycles. These properties suggest such composites as materials of interesting from both fundamental and practical points of view.