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Wyszukujesz frazę "rheological properties." wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Physico-chemical properties of chitosan composites with synthetic polymers and inorganic additives
Autorzy:
Lewandowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1034867.pdf
Data publikacji:
2015
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
AFM
chitosan
poly(vinyl alcohol)
polyvinylpyrrolidone composites
rheological properties
Opis:
In the present study the results of rheological measurements and atomic force microscopy (AFM) of polymer composites with montmorillonite (MMT) are presented. Chitosan is blended with synthetic polymers and inorganic additives in acetic acid solution and this solution is cast to prepare the mixture film. Flow measurements were made on a Bohlin Visco 88 rotary viscometer in the temperature range 25ºC-40ºC. The apparent shear viscosity and rheological parameters of the unmodified components and their composites were determined and discussed. Polymer films were examined using a Scanning Probe Microscopy SPM production Veeco. The obtained results suggest that the modification of several properties of polymer composites is a consequence of the interaction between the polymeric components and inorganic additives.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 162-169
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rheological properties of chitosan blends with partially hydrolyzed polyacrylamide in different solvents
Autorzy:
Lewandowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035377.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
apparent shear viscosity
chitosan
polyacrylamide
polymer blends
rheological properties.
Opis:
In the present paper, the results of rheological measurements in solutions of chitosan (Ch) with partially hydrolyzed polyacrylamide (HPAM) are presented. Aqueous acetic acid, lactic acid and aqueous acetic acid/NaCl were used as solvents for chitosan, HPAM and Ch/HPAM solution blends. The criterion of miscibility of solution blends, based on the additivity rule of apparent shear viscosity (ηa) has been discussed. The rheological parameters from power law (Ostwald de Waele model) and activation energy of viscous flow (Ea) have been calculated from the flow curves and Arrhenius plots, respectively. It was found that studied polymer solutions exhibited the non-Newtonian behaviour with shear-thinning and/or shear-thickening areas. The final result depends on the thermodynamic goodness of the solvent and on the blend composition.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2012, 17; 53-62
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rheological properties of collagen gels after UV treatment
Autorzy:
Sionkowska, Alina
Adamiak, Katarzyna
Lewandowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1844906.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
rheological properties
collagen gel
treatment
właściwości reologiczne
żel kolagenowy
lecznictwo
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 9
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rheological and mechanical studies of chitosan blends with the addition of an ionic liquid
Autorzy:
Lewandowska, Katarzyna
Szulc, Marta
Powiązania:
https://bibliotekanauki.pl/articles/1034202.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan
ionic liquid
mechanical properties
poly(vinyl alcohol)
polymer blends
rheological properties
Opis:
In the present paper, results from rheological measurements and tensile tests of polymer blends containing chitosan and poly(vinyl alcohol) with different additions of an ionic liquid are presented. Flow measurements were carried out using solutions of pure polymers and their blends with and without the addition of an ionic liquid. It has been observed that the polymer solutions and their blends exhibited non-Newtonian behaviour. Rheological parameters from the power law and activation energy of viscous flow were determined and discussed. Mechanical properties, such as the tensile strength and ultimate percentage of elongation of films, have been determined and compared. This study thus shows that the addition of an ionic liquid is an effective method for improving the flexibility of chitosan blends.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2019, 24; 119-126
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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