Synthesis and properties of carbamoylethyl starch

• Autorzy: Rupiński S. , Brzozowski Z. K.

Warianty tytułu

PL

Synteza i właściwości karbamoiloetyloskrobi

• Języki publikacji: EN

Abstrakty

EN

A new ecological and simple method of acrylamide derivatives of starch (carbamoylethyl starch CrES) obtaining, consisting in starch modification using Michael addition reaction in base environment, was elaborated. The course of starch degradation (with the aim to decrease its molecular weight) was investigated as well as the course of substitution reaction of starch with acrylamide dependently on the amounts (concentrations) of bases used (NaOH and KOH). The effects of temperature, reaction time and amount (part) of acrylamide added on degree of substitution (DS) were studied. CrES structure was confirmed using the following methods: MALDI TOF, FT-IR spectroscopy, DSC and X-ray diffractometry. Molecular weight distribution of starch modification, what can be controlled by degradation time, was determined using massspectrometry. Modified starch was well soluble in water and their aqueous solutions, concentrated up to 40%, were obtained. The effects of solution concentration and degree of substitution on the solution viscosity dependently on the shear rate have been studied. The influence of DS value and temperature on the solubility of CrES in water has been established too.

Słowa kluczowe

EN

starch modification and degradation; carbamoylethyl starch

PL

skrobia; degradacja; modyfikacja; karbamoiloetyloskrobia; rozpuszczalność w wodzie; stopień podstawienia

• Wydawca: Sieć Badawcza Łukasiewicz – Instytut Chemii Przemysłowej
• Czasopismo: Polimery
• Rocznik: 2003
• Tom: T. 48, nr 2
• Strony: 122--129
• Opis fizyczny: Bibliogr. 20 poz.

Twórcy

autor

Rupiński S.

• Warsaw University of Technology, ul. Koszykowa 75, 00-662 Warszawa, Poland

autor

Brzozowski Z. K.

• Warsaw University of Technology, ul. Koszykowa 75, 00-662 Warszawa, Poland

Bibliografia

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