Clay concentration dependence of microstructure in deformed poly(N-isopropylacrylamide)-clay nanocomposite gels
Clay concentration dependence of microstructure in deformed poly(N-isopropylacrylamide)-clay nanocomposite gels
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DOI：
10.1021/ma061688o
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发表时间：
2006-11-14
期刊：
影响因子：
5.5
通讯作者：
Shibayama, Mitsuhiro
中科院分区：
文献类型：
--
作者：
Miyazaki, Sho;Karino, Takeshi;Shibayama, Mitsuhiro
通过力学测量和小角中子散射（SANS）研究了不同粘土含量的聚（N-异丙基丙烯酰胺）-粘土纳米复合凝胶（NC凝胶）的微观结构与拉伸比λ的关系。力学性能测试表明，聚（N-异丙基丙烯酰胺）（PNIPA）链桥接粘土片晶，N-链，每单位体积的数量增加与C-粘土（4/3）。二维SANS强度模式显示所谓的“异常蝴蝶”模式。然而，平行于和垂直于拉伸方向的扇区平均散射强度都很好地由Ornstein-Zernike（OZ）散射函数表示，这表明NC凝胶具有非常小的交联不均匀性，而不管C-粘土和λ（λ
The microscopic structure of poly(N-isopropylacrylamide)-clay nanocomposite gels (NC gels) having various clay concentrations (C-clay) was investigated by mechanical measurement and small-angle neutron scattering (SANS) as a function of stretching ratio lambda. The mechanical measurements indicated that the number of poly(N-isopropylacrylamide) (PNIPA) chains bridging clay platelets, N-chain, per unit volume increased with C-clay(4/3). Two-dimensional SANS intensity patterns exhibited the so-called "abnormal-butterfly" pattern. However, both sector-averaged scattering intensities parallel and perpendicular to the stretching direction were well represented by Ornstein-Zernike (OZ) scattering functions, suggesting that the NC gels have very little cross-linking inhomogeneities regardless of C-clay and of lambda (lambda