FTIR‐ATR studies of drawing and poling in polymer bilaminate films
FTIR‐ATR studies of drawing and poling in polymer bilaminate films
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聚合物双层薄膜拉伸和极化的 FTIR-ATR 研究
DOI：
10.1002/polb.1994.090321213
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
L. J. Fina
中科院分区：
文献类型：
--
作者：
Gangchi Chen;Ji Su;L. J. Fina
与其他研究中观察到的单个膜相比，拉伸和极化的聚偏氟乙烯（PVF 2）/尼龙11双层膜的剩余极化大幅增加，这为用FTIR-ATR光谱法检查各种处理的单层和双层膜中的偶极取向提供了动力。使用两个样品取向和每个入射光角度的两个光偏振从每个表面收集四个ATR光谱。改变入射光角度以获得关于结构随深度变化的信息。使用各向异性光学常数的实验光学的计算机模拟有助于解释实验结果。作为PVF 2和尼龙11中的简单单向拉伸的结果，在横向于拉伸方向的平面中观察到偶极取向的各向异性。在单层和双层膜中，尼龙11中的酰胺平面和PVF 2中的CF2偶极子的平均方向位于膜的平面中，由于单向拉伸而垂直于随后的极化场方向。在尼龙11的单层和双层膜中，横向平面取向是深度依赖性的，并且归因于表面诱导效应。1.6 MV/cm的极化场在单层膜和双层膜的表面之间产生大的差异。在拉伸和极化的双层层合物的内部界面处，在极化中重要的PVF 2和尼龙11偶极子似乎是随机的。结构的影响，这以及从光谱的其他意见被解释在大的剩余批量极化极化的双层。John Wiley & Sons，Inc.
A large increase in the remnant polarization of drawn and poled poly(vinylidene fluoride) (PVF2)/nylon 11 bilaminates compared with the individual films observed in other studies provides the motivation for the examination of dipole orientation in variously treated single and bilaminate films with FTIR-ATR spectroscopy. Four ATR spectra are collected from each surface using two sample orientations and two light polarizations for each incident light angle. The incident light angle is varied to obtain information about the change in structure with depth. Computer simulations of the experimental optics using anisotropic optical constants aides in the interpretation of experimental results. As the result of simple one-way drawing in PVF2 and nylon 11, anisotropy in dipole orientation is observed in the plane transverse to the draw direction. In both single and bilaminate films, the average direction of the amide plane in nylon 11 and the CF2 dipoles in PVF2 resides in the plane of the film, perpendicular to the subsequent poling field direction as a result of one-way drawing. The transverse plane orientation is depth dependent in nylon 11 in both single and bilaminate films and is attributed to a surface-induced effect. Poling fields of 1.6 MV/cm produce large differences between the surfaces of single films and the bilaminates. At the interior interface of the drawn and poled bilaminates, the PVF2 and nylon 11 dipoles important in polarization appear to be random. The structural implications of this as well as other observations from the spectra are interpreted in terms of the large remnant bulk polarization in the poled bilaminate. © 1994 John Wiley & Sons, Inc.