Orientation behavior of the three principal crystallographic axes of poly(butylene terephthalate) estimated in terms of orientation distribution function of crystallites
Orientation behavior of the three principal crystallographic axes of poly(butylene terephthalate) estimated in terms of orientation distribution function of crystallites
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DOI：
10.1021/ma030347x
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发表时间：
2004-01
期刊：
影响因子：
5.5
通讯作者：
M. Matsuo;Reiko Adachi;Xiaowen Jiang;Y. Bin
中科院分区：
文献类型：
--
作者：
M. Matsuo;Reiko Adachi;Xiaowen Jiang;Y. Bin
用三斜晶系聚对苯二甲酸丁二醇酯（PBT）微晶的取向分布函数，对PBT的a、B和c三个主晶轴的取向行为进行了估算。尽管有许多论文报道了晶纹石的取向，但本文是三斜单元系统的首次成功尝试。对于具有三斜晶系晶体单元的结晶聚合物，不存在垂直于a-、B-和c-轴的晶面，其反射不能通过X射线衍射技术检测。因此，a轴、B轴和c轴的函数必须由Roe和Krigbaum提出的方法获得。在这样做时，倒易晶格矢量的取向函数必须通过X射线衍射测量许多晶面。但对于聚对苯二甲酸乙二酯（PET）、尼龙-66和PBT等具有三斜晶系的结晶聚合物，由于取向函数的限制，测量非常困难。
The orientation behavior of the three principal crystallographic axes, the a-, b-, and c-axes, was estimated in terms of the orientation distribution function for poly(butylene terephthalate) (PBT) crystallites with a triclinic unit cell. Despite a number of papers reported for the orientation of crytsallites, this paper is the first successful trial for a triclinic unit system. For crystalline polymers with a triclinic crystal unit, there are no crystal planes perpendicular to the a-, b-, and c-axes whose reflection cannot be detected by X-ray diffraction techniques. Accordingly, the functions of the a-, b-, and c-axes must be obtained from the method proposed by Roe and Krigbaum. In doing so, the orientation functions of the reciprocal lattice vectors must be measured by X-ray diffraction for a number of crystal planes. But the measurements are very difficult for crystalline polymers such as poly(ethylene terephthalate) (PET), nylon-66, and PBT with the triclinic crystal unit, since the orientation func...