Fractionation and crystallization of wholly aromatic rigid polymer

全芳香族刚性聚合物的分馏与结晶

• 批准号: 16550177
• 负责人: SHIMAMURA Kaoru
• 金额: $ 2.05万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16550177/
• 关键词: rigid Polymer; fractionation; distribution of molecular length; single crystal; crystallization

Fractionation of the rigid polymer, poly(p-phenylene benzobisthiazole) (PBZT) was carried out in dilute solution in conc. methane sulfuric acid using silica gels as packing material of a column. Several combinations of the average chain length of the fractionating materials and the average pore diameter of the gels were examined to improve fractionation resolution. The gels with the average pore diameter near to the average chain length resulted in high fractionation resolution. Single crystals of the fractionated and unfractionated PBZT's were observed by TEM. Both single crystals were fundamentally composed of rod crystals with the chain orienting normal to the rods. The unfractionated PBZT made a cluster of parallel rod crystals, where longer chains penetrated a few rod crystals leaving their chain ends within the crystalline core. On the contrary, with the fractionated polymer, extended- chain rod-like crystals were dispersed isolated from each other. This morphology enables us to estimate the chain length visibly by TEM, for which a few milligrams of the material is enough for the observation.

以硅胶为柱填料，在浓硫酸中对刚性聚合物聚对苯撑苯并双噻唑（PBZT）进行了分离。研究了分级材料的平均链长和凝胶的平均孔径的几种组合以提高分级分辨率。平均孔径接近平均链长的凝胶具有较高的分离分辨率。通过TEM观察分级和未分级的PBZT的单晶。这两种单晶基本上都是由棒状晶体组成的，其中链的取向垂直于棒状晶体。未分级的PBZT形成一簇平行的棒状晶体，其中较长的链穿过一些棒状晶体，将它们的链端留在晶体核心内。相反，对于分级的聚合物，伸展链棒状晶体彼此分散分离。这种形态使我们能够通过TEM可见地估计链长，对于这种情况，几毫克的材料就足以进行观察。

项目成果

Fractionation and Crystal Morphology of Rigid Polymer, Poly (p-phenylene benzobisthiazole)

硬质聚合物聚（对亚苯基苯并双噻唑）的分级和晶体形态

• 发表时间: 2004
• 期刊: Journal of Macromolecular science Part B physics 43巻・5号
• 作者: K.Simamura;N.Michiaki;T.Ikeda;T.Uchida;Manabu Hirao
• 通讯作者: Manabu Hirao

Fractionation and Crystal Morphology of Rigid Polymer, Poly(p-phenylene benzobisthiazole)

硬质聚合物聚（对亚苯基苯并双噻唑）的分级和晶体形貌

• 发表时间: 2004
• 期刊: Journal of Macromolecular science Part B Physics 43(5)
• 作者: Kaoru Shimamura;Nobuyuki Michiaki;Takaya Ikeda;Tetsuya Uchida;Manabu Hirao
• 通讯作者: Manabu Hirao