EXPERIMENTAL-EVIDENCE FOR INHOMOGENEOUS SWELLING AND DEFORMATION IN STATISTICAL GELS
EXPERIMENTAL-EVIDENCE FOR INHOMOGENEOUS SWELLING AND DEFORMATION IN STATISTICAL GELS
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DOI：
10.1103/physrevlett.66.1595
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发表时间：
1991-03-25
影响因子：
8.6
通讯作者：
BASTIDE, J
中科院分区：
文献类型：
--
作者：
MENDES, E;LINDNER, P;BASTIDE, J
用小角中子散射研究了溶剂溶胀网络中聚合物浓度的相关性。 该网络是由溶液中长链的统计交联制成的。 在小的散射矢量下，强度在溶胀时强烈增加。 在拉伸时，观察到异常取向的等强度线（“蝴蝶”）。 这些影响很好地描述了交联引起的不均匀的溶胀或变形的分形异质性的模型。
Polymer concentration correlations in a network swollen by a solvent are studied by small-angle neutron scattering. The network is made by statistical cross-linking of long chains in solution. At small scattering vectors, the intensity strongly increases upon swelling. Upon stretching, unusually oriented isointensity lines ("butterflies") are observed. These effects are well described by a model of fractal heterogeneities of cross-linking giving rise to nonhomogeneous swelling or deformation.