Rheological and micro-DSC studies on the aqueous mixtures of methylcellulose and ammonium poly(3-thiophene acetic acid)
Rheological and micro-DSC studies on the aqueous mixtures of methylcellulose and ammonium poly(3-thiophene acetic acid)
复制标题
甲基纤维素和聚（3-噻吩乙酸）铵水混合物的流变学和微 DSC 研究
DOI：
10.1016/j.carbpol.2011.04.009
复制
发表时间：
2011-07-01
影响因子：
11.2
通讯作者：
Zhang, Hongbin
中科院分区：
文献类型：
--
作者：
Lv, Renliang;Luan, Tu;Zhang, Hongbin
在本工作中，制备了甲基纤维素多糖（MC）和聚（3-噻吩乙酸铵）导电聚合物（PTAA-NH4）的水性混合物，并研究了PTAA-NH4对MC溶液流变学和热性能的影响。发现混合物具有取决于剪切速率和 PTAA-NH4 浓度的显着粘性协同作用，表明 MC 和 PTAA-NH4 两种两亲聚合物之间存在特殊的相互作用。与纯MC溶液相比，混合物表现出更明显的剪切稀化特性。当PTAA-NH4的添加浓度高于0.15%时，在低温下也观察到混合物的弱凝胶行为。此外，虽然MC的胶凝和脱胶模式没有因PTAA-NH4的添加而改变，但流变学和量热测量表明，PTAA-NH4的存在使MC溶液的盐凝胶转变温度随着PTAA-NH4浓度的增加而升高。 (C) 2011 Elsevier Ltd. 保留所有权利。
In the present work aqueous mixtures of polysaccharide of methylcellulose (MC) and conductive polymer of ammonium poly(3-thiophene acetic acid) (PTAA-NH4) were prepared and the effect of PTAA-NH4 on the rheological and thermal properties of MC solution were investigated. Significant viscous synergism depending on shear rate and concentration of PTAA-NH4 was found for the mixtures, indicating a special interaction between the two amphiphilic polymers of MC and PTAA-NH4. In comparison with pure MC solutions, the mixtures showed much more evident shear thinning characteristics. When the concentration of PTAA-NH4 added was higher than 0.15%, weak gel-like behavior of the mixtures was also observed at low temperatures. In addition, though the gelation and degelation patterns of MC were not changed by the addition of PTAA-NH4, both rheological and calorimetric measurements showed that the presence of PTAA-NH4 shifted the sal-gel transition temperature of MC solution to higher temperature with increasing of the concentration of PTAA-NH4. (C) 2011 Elsevier Ltd. All rights reserved.