Melt Structure of Crystalline Polymers as Studied by Means of Magnetic Orientation
Melt Structure of Crystalline Polymers as Studied by Means of Magnetic Orientation
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磁取向研究结晶聚合物的熔体结构
DOI：
10.2320/matertrans1989.41.955
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Tsunehisa Kimura
中科院分区：
文献类型：
--
作者：
T. Kawai;Y. Sakamoto;Tsunehisa Kimura
在一系列的论文中，我们已经报道了结晶聚合物，包括聚（2，6-萘二甲酸乙二醇酯）（PEN），全同立构聚苯乙烯（iPS），和聚（对苯二甲酸乙二醇酯）（PET）从熔体等温结晶的诱导期经历磁取向。然而，我们最近发现，全同立构聚丙烯（iPP）在熔融状态下经历磁取向。还发现PET即使在其熔融状态下也在磁场中排列。这些发现表明，负责磁取向的有序结构可以追溯到诱导期之前的熔体。本文通过磁取向和结晶过程研究了熔体中存在的有序结构。提出了描述有序结构的结构和形成机理的假说。
In a series of papers, we have reported that crystalline polymers including poly(ethylene--2,6-naphthalate) (PEN), isotactic polystyrene (iPS), and poly(ethylene terephthalate) (PET) undergo magnetic orientation in the induction period of isothermal crystallization from the melt. However, we have recently found that isotactic polypropylene (iPP) undergoes magnetic orientation in the molten state. Also it was found that PET aligns in the magnetic field even in its molten state. These findings indicate that the ordered structure responsible for the magnetic orientation could be traced back to the melt before the induction period. In this study, the ordered structure existing in the melt is studied by means of magnetic orientation and the crystallization process. A hypothesis describing the structure and formation mechanism of the ordered structure is presented.