Structure of a new crystalline phase of syndiotactic polypropylene
Structure of a new crystalline phase of syndiotactic polypropylene
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DOI：
10.1002/polb.1991.090291310
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发表时间：
1991-12
期刊：
影响因子：
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通讯作者：
Y. Chatani;H. Maruyama;T. Asanuma;Tetsunosuke Shiomura
中科院分区：
文献类型：
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作者：
Y. Chatani;H. Maruyama;T. Asanuma;Tetsunosuke Shiomura
在X射线研究退火或吸收溶剂蒸气对从平面锯齿形到螺旋形的相变的影响的过程中，我们发现，通过将其暴露于几种有机溶剂蒸汽，平面锯齿形转变为链重复为11.60 8的新结晶相，（即，不同于平面锯齿形的5.06 A和螺旋形的7.5）。螺旋形式）。然而，这种新的结晶相并不是间规聚苯乙烯那样的 sPP 与溶剂的分子化合物，而是真正的聚合物相。
In the course of an x-ray study of the influence of annealing or absorption of solvent vapor on the phase change from the planar zigzag form to the helical form, we found that the planar zigzag form was transformed, by exposing it to several kinds of organic solvent vapor, to a new crystalline phase having a chain repeat of 11.60 8,(ie, different from 5.06 A for the planar zigzag form and 7.5 for the helical form). This new crystalline phase is, however, not a molecular compound of sPP with the solvents as in the case of syndiotactic p~ lystyrene,~ but a genuine polymer phase.