In Situ Observation of Tensile Deformation Processes of Soft Colloidal Crystalline Latex Fibers
In Situ Observation of Tensile Deformation Processes of Soft Colloidal Crystalline Latex Fibers
复制标题
软胶体结晶乳胶纤维拉伸变形过程的原位观察
DOI：
10.1021/ma900503h
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发表时间：
2009-04
期刊：
影响因子：
5.5
通讯作者：
Men, Yongfeng
中科院分区：
文献类型：
--
作者：
Zhang, Jianqi;Roth, Stephan V.;Hu, Shanshan;Gehrke, Rainer;Rieger, Jens;Men, Yongfeng
利用同步辐射小角X射线散射技术研究了具有纤维对称结晶结构的苯乙烯/丙烯酸正丁酯共聚乳胶膜在单轴拉伸下的变形机理。以相对于纤维轴成0度、35度和55度的角度拉伸纤维。在所有的情况下，微观变形的微晶内被发现偏离仿射变形行为相对于宏观变形率。此外，这三种情况下偏离的程度也不同。这种特殊的行为可以归因于晶体的（111）平面，即致密堆积的平面，在每种情况下相对于拉伸方向的相对取向。当拉伸方向与结晶（111）面一致时，这是相对于纤维轴成0度和55度的拉伸方向的情况，与拉伸方向相对于结晶（111）面任意取向时相比，微观变形偏离仿射行为更少。
The deformation mechanism or styrene/n-butyl acrylate copolymer latex films with fiber symmetric crystalline structure subjected to uniaxial stretching was studied using synchrotron small-angle X-ray scattering technique. The fibers were drawn at angles or 0, 35, and 55 degrees with respect to the Fiber axis. In all cases, the microscopic deformation within the crystallites was Found to deviate from affine deformation behavior with respect to the macroscopic deformation ratio. Moreover, the extent of this deviation is different in the three cases. This peculiar behavior can be attributed to the relative orientation of the (111) plane of the crystals, the plane of densest packing, with respect to the stretching direction in each case. When the stretching direction coincides with the crystallographic (111) plane, which is the case for stretching directions of 0 and 55 degrees with respect to the fiber axis, the microscopic deformation deviates less from affine behavior than when the stretching direction is arbitrarily oriented with respect to the crystallographic (111) plan.