Swelling behavior of thin, surface-attached polymer networks
Swelling behavior of thin, surface-attached polymer networks
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DOI：
10.1021/ma034737v
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发表时间：
2004-02-10
期刊：
影响因子：
5.5
通讯作者：
Rühe, J
中科院分区：
文献类型：
--
作者：
Toomey, R;Freidank, D;Rühe, J
薄的，表面附着的交联二甲基丙烯酰胺（DMAAm）的膜与水接触的溶胀行为的特点是与多角度零椭圆偏振法和相比，非附着的，散装DMAAm的溶胀。网络.聚合物网络是由DMAAm和光反应性二苯甲酮衍生物单体组成的统计共聚物的交联薄膜制成的。通过基于二苯甲酮的硅烷单层实现膜与表面的共价附着。UV照射同时交联和化学连接该层，并将该层化学连接到表面，形成在溶胀时不分层的稳定网络。据观察，表面附着的网络溶胀小于非附着的，散装网络在相同的交联密度，然而，表面附着的网络的溶胀是大于所建议的简单的几何考虑在一个维度上的溶胀。结果与Flory-Reynner理论扩展到一维溶胀定性一致。
The swelling behavior of thin, surface-attached cross-linked dimethylacrylamide (DMAAm) films in contact with water has been characterized with multiple-angle nulling ellipsometry and compared to the swelling of nonattached, bulk DMAAm. networks. The polymer networks are fabricated by cross-linking thin films of statistical copolymers composed of DMAAm and a photoreactive benzophenone derivative monomer. Covalent attachment of the film to the surface is achieved by means of a benzophenone-based silane monolayer. UV illumination simultaneously cross-links and chemically links the layer and chemically links the layer to the surface, forming stable networks that do not delaminate upon swelling. It is observed that the surface-attached networks swell less than the nonattached, bulk networks at the same cross-link density; however, the swelling of surface-attached networks is larger than that suggested by simple geometric considerations for swelling in one dimension. The results are in qualitative agreement with Flory-Rehner theory extended to one-dimensional swelling.