Crystalline structure of α-form syndiotactic polystyrene
Crystalline structure of α-form syndiotactic polystyrene
复制标题
α型间规聚苯乙烯的晶体结构
DOI：
10.1016/0032-3861(93)90444-f
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发表时间：
1993
期刊：
影响因子：
4.6
通讯作者：
Robert L. Miller
中科院分区：
文献类型：
--
作者：
Zhan Sun;Robert L. Miller
用X射线衍射分析研究了间规聚苯乙烯的结晶结构。通过在200° C下将固态拉伸棒拉伸500%来获得高度取向的试样。共识别出23个布拉格反射。在较高层线上出现许多布拉格反射，表明在张力下退火后晶体结构的三维规则性得到显著改善。所有布拉格反射都可以用六边形晶胞a= 26.3，c= 5.1 λ来索引，这支持了Greis等人使用电子衍射分析的先前观察。
X-ray diffraction analysis has been used to study the crystalline structure of syndiotactic polystyrene. A highly oriented specimen was obtained by stretching a tensile bar in the solid state for 500% at 200° C. A total of 23 Bragg reflections were identified. The appearance of many Bragg reflections on higher layer lines indicates that three-dimensional regularity of the crystal structure is significantly improved after annealing under tension. All Bragg reflections could be indexed with a hexagonal unit cell a= 26.3, c= 5.1 A ̊, which supports a previous observation by Greis et al. using electron diffraction analysis.