Gelation of polyacrylamide by Cr~(3+): analysis of mechanism and thermal stability of the gel

H.D.Duan; W.G.Hou; Y.M.Wu; S.H.Han; L.Z.Wang

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Gelation of polyacrylamide by Cr~(3+): analysis of mechanism and thermal stability of the gel

机译：Cr〜（3+）凝胶化聚丙烯酰胺：凝胶机理和热稳定性分析

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The crosslinking reaction between partially hydrolyzed polyacrylamide (HPAM) and Cr~(3+) was investigated. The reactive groups of HPAM were determined by FT-IR spectra. The viscosity and the transmittance of the gelling fluids were also measured through crosslinking process. The chromium ions reacted mainly with the carboxylic groups of HPAM and the hydrolysis degree (HD) of HPAM samples had a pronounced influence on the reaction rates. Differential scanning calorimetry and thermogravimetry were used to study the thermal stability of the resulting gels which exhibited much higher thermal stability than HPAM samples.

机译：研究了部分水解聚丙烯酰胺（HPAM）与Cr〜（3+）的交联反应。通过FT-IR光谱确定HPAM的反应性基团。还通过交联过程测量了胶凝液的粘度和透射率。铬离子主要与HPAM的羧基反应，HPAM样品的水解度（HD）对反应速率有显着影响。差示扫描量热法和热重法用于研究所得凝胶的热稳定性，该凝胶比HPAM样品具有更高的热稳定性。

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《Journal of the Indian Chemical Society》 |2002年第6期|共4页
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H.D.Duan; W.G.Hou; Y.M.Wu; S.H.Han; L.Z.Wang;
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Gelation of polyacrylamide by Cr~(3+): analysis of mechanism and thermal stability of the gel

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