foldできない高分子鎖の結晶化・結晶欠陥

不能折叠的聚合物链的结晶和晶体缺陷

• 批准号: 08455457
• 负责人: SHIMAMURA Kaoru
• 金额: $ 4.74万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455457/
• 关键词: Rigid Polymer; Crystallization; Fractionation; Crystal Morphology; Surface Morphology

Following results were obtained through this research project.(1) Factionation of rigid polymerFractionation method for rigid polymer was developed basing on GPC,e.g., PBZT and PBZO (molecular length < 40nm) was fractionated.(2) Effect of the molecular weight distribution on crystal morphologyWith fractionated sample, plate like crystals were obtained because of short cilia on both sides of the plate. On the contrary, there is wide distribution of molecular weight in unfractionated sample, many longer cilia stuck out from mother crystal which promoted growing of dauther crystal, hence multi layr plate-like crystals or raft-like aggregates of rod-like crystals were obtained.(3) Surface morphology of rigid polymer crystalsThe crystal surface was examined by an atomic force microscopy. Primary nucleus at the center of the lozenge plate was composed of the longest molecular chains. Along the diagonal, there was a striation.(4) Effects of isomerism on crystallization and crystal defectsNovel polymer cis-PBZT was synthesized. Its morphology and crystal structure were compared with those of trans-PBZT and the effects of the isomerism were discussed. In the case of cis- PBZT,packing disorder along the chain axis (axial shift) was diminished.(5) Effects of chemical structure on crystallization and crystal defectsCis-PBZO which has different element in hetero rings from PBZT was synthesized and crystallized. The effects of chemical structure on the crystallization and crystal defects of rigid polymers were discussed.

通过本研究项目获得以下结果：(1)刚性聚合物的分馏基于GPC开发了刚性聚合物的分馏方法，如：PBZT和PBZO（分子长度< 40nm）进行分馏。(2)分子量分布对晶体形态的影响分选样品，由于板两侧纤毛较短，得到板状晶体。未分离样品分子量分布较广，母晶突出许多较长的纤毛，促进子晶生长，得到多层板状晶体或棒状晶体的筏状聚集体。(3)刚性聚合物晶体的表面形貌采用原子力显微镜对晶体表面进行了观察。菱形片中心的初核由最长的分子链组成。沿着对角线，有一条条纹。(4)异构体对结晶和晶体缺陷的影响合成了新型聚合物顺式pbzt。比较了其与反式pbzt的形貌和晶体结构，并讨论了同分异构的影响。顺式PBZT的情况下，沿链轴的堆积紊乱（轴向移位）减弱。(5)化学结构对结晶和晶体缺陷的影响，合成了与PBZT异质环中元素不同的sci - pbzo。讨论了化学结构对刚性聚合物结晶和晶体缺陷的影响。

项目成果

Chunxiao Zhang, Satoshi Tanigawa, Tetsuya Uchida, Kaoru Shimamura: "Poly [(benzo [1,2-d : 5,4-d'] bisthiazole-2,6-diyl) -1,4-phenylene]" Memoirs of the Faculty of Engineering, Okayama University. 31 (1). 11 (1996)

张春晓、谷川聪、内田哲也、岛村薰：“聚[(苯并[1,2-d : 5,4-d]双噻唑-2,6-二基)-1,4-亚苯基]”回忆录

Chunxiao Zhang et al: "Synthesis and Characterization of Poly[(benzo〔1,2-d : 5,4-d′〕bisthiazole-2,6-diyl)-1,4-phenylene]" Memoirs of the Faculty of Engineering,Okayama univ.31(1). 11-17 (1996)

张春晓等：“聚[(苯并[1,2-d : 5,4-d′]双噻唑-2,6-二基)-1,4-亚苯基]的合成与表征”工程学院回忆录，冈山大学31(1)。11-17(1996)。

Kaoru Shimamura, Chunxiao Zhang, Tetsuya Uchida: "Solution-Grown Crystals of Poly (p-phenylene benzobisthiazole)" Memoirs of the Faculty of Engineering, Okayama University. 31 (1). 5 (1996)

Kaoru Shimamura、Chunxiao Zhu、Tetsuya Uchida：“溶液生长的聚（对亚苯基苯并双噻唑）晶体”冈山大学工学院回忆录。