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首页> 外文期刊>Journal of Applied Polymer Science >Rheological study of self-crosslinking and co-crosslinking of ammonium zirconium carbonate and starch in aqueous solutions
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Rheological study of self-crosslinking and co-crosslinking of ammonium zirconium carbonate and starch in aqueous solutions

机译：碳酸锆铵和淀粉在水溶液中自交联和共交联的流变学研究

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摘要

Different from common hydrogel systems formed by a polymer and a crosslinker, a hydrogel consisting of both self-crosslinkable ammonium zirconium carbonate (AZC) and co-crosslinkable starch was investigated in this study using rheological measurements. The evolution of viscoelastic properties of AZC solutions and AZC-starch mixtures was characterized, and the crosslinking kinetics was determined. It was found that for both AZC self-crosslinking and AZC-starch co-crosslinking, the initial bond formation rate and the gel strength exhibited a power law scaling with polymer concentrations. The competition reaction between self-crosslinking and co-crosslinking indicates that the gelation kinetics strongly depends on the AZC concentration but less depends on starch concentration. The temperature dependence of crosslinking was described by the Arrhenius plots which demonstrate a good linearity. It was determined that the activation energy of AZC self-crosslinking was approximately 145-151 kJ/mol, and the activation energy of AZC-starch co-crosslinking was 139 kJ/mol. The effect of solution pH on the crosslinking process was also studied.
机译：与由聚合物和交联剂形成的普通水凝胶体系不同，本研究使用流变学方法研究了由可自交联的碳酸锆铵（AZC）和可共交联的淀粉组成的水凝胶。表征了AZC溶液和AZC-淀粉混合物的粘弹性质演变，并确定了交联动力学。发现对于AZC自交联和AZC淀粉共交联，初始键形成速率和凝胶强度均表现出随聚合物浓度变化的幂律定标。自交联和共交联之间的竞争反应表明，凝胶动力学很大程度上取决于AZC浓度，而较少取决于淀粉浓度。交联的温度依赖性通过Arrhenius图描述，该图证明了良好的线性。经测定，AZC自交联的活化能为约145-151kJ / mol，且AZC-淀粉共交联的活化能为139kJ / mol。还研究了溶液pH值对交联过程的影响。

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