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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical properties of poly(N-isopropyl-acrylamide- co-itaconic acid) hydrogels
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Mechanical properties of poly(N-isopropyl-acrylamide- co-itaconic acid) hydrogels

机译：聚（N-异丙基-丙烯酰胺-衣康酸）水凝胶的机械性能

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Hydrogels of N-isopropylacrylamide and itaconic acid were synthesized with different monomer ratios and with two crosslinking agent concentrations. The different xerogels were immersed in water and the swelling process was conducted up to equilibrium conditions at two temperatures (22 and 37degreesC). These temperatures are lower and higher than the transition temperature shown by PNIPA hydrogels. The mechanical properties of the different solvated hydrogels were examined by oscillatory shear measurements at 22 and 37degreesC. The copolymer volume fraction and the elastic storage modulus of the hydrogels decreased as the itaconic acid percentage in the copolymer increased. This behavior was attributed to the higher hydrophilic character of the itaconic acid comonomer. Effective crosslinking density, molar mass between crosslinks, and the polymer-solvent interaction parameter were determined from the experimental values of the elastic storage moduli and the copolymer volume fractions. (C) 2002 Wiley Periodicals, Inc. [References: 28]
机译：合成了具有不同单体比例和两种交联剂浓度的N-异丙基丙烯酰胺和衣康酸水凝胶。将不同的干凝胶浸入水中，并在两个温度（22和37摄氏度）下进行溶胀过程直至达到平衡条件。这些温度低于和高于PNIPA水凝胶显示的转变温度。通过在22和37℃下的振荡剪切测量来检查不同的溶剂化水凝胶的机械性能。随着共聚物中衣康酸百分比的增加，水凝胶的共聚物体积分数和弹性储能模量降低。此行为归因于衣康酸共聚单体的较高亲水性。由弹性储能模量和共聚物体积分数的实验值确定有效的交联密度，交联之间的摩尔质量以及聚合物-溶剂相互作用参数。 （C）2002 Wiley Periodicals，Inc. [参考：28]

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