DEVELOPMENT OF QUASI-MICROSCOPIC TECHNIQUES FOR MOLECULAR FIBER/WIRE OF AROMATIC POLYIMIDES

芳香族聚酰亚胺分子纤维/丝准微观技术开发

• 批准号: 04650816
• 负责人: KOCHI Masakatsu
• 金额: $ 1.28万
• 依托单位: SHIZUOKA INSTITUTE OF SCIENCE AND TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650816/
• 关键词: Molecular Fiber; Molecular Wire; Aromatic Polyimide; Monoaxial Drawing; Molecular Orientation; Absorption Dichroism; 全芳香族ポリイミド; ペリレンビスイミド色素; ポリアミド酸繊維; 完全棒状ポリイミド; 極細繊維化技術

1.The cold drawing of as-cast polyamic acid (PAA) film followed by thermal imidization and annealing under tension was very effective for improving the tensile mechanical properties of films of rigid and linear polyimides (PIs) because the orientation of the main chains is retained by the formation of ordered phases during imidization.The swelling method was also an excellent technique. The drawing of swollen polyamic acid films can provide more draw ratio than the cold drawing method if mixed swelling solvents and temperatures are chosen properly.The hot drawing methed was appropriate for polyimides of flexible main chains. Especially it was most effective for flexible PI(PMDA/3.4'-ODA) with a linear main chain in an extended conformation.2.The absorption dichroism of perylenebisimide dye was applied to evaluate the monoaxial molecular orientation of PAA and PI as function of draw ratio of PAA films. The dichroic spectra showed that for rigid PI (BPDA/PDA) spontaneous molecular orientation occurs during thermal imidization of slightly drawn PAA(BPDA/PDA) filsm.3.A new apparatue was prepared for spinning PAA fibers. The devel opment of molecular fiber and molecular wire of aromatic PIs are in progress using this apparatus and the drawing techniques for PI films.

1.对聚酰胺酸（PAA）铸态膜进行冷拉伸、热酰亚胺化和拉伸退火处理，可以有效地改善刚性和线型聚酰亚胺（PI）膜的拉伸力学性能，因为在酰亚胺化过程中形成有序相，保持了主链的取向，溶胀法也是一种很好的方法。选择合适的溶胀溶剂和温度，溶胀聚酰胺酸薄膜的拉伸比冷拉伸有较大的提高，热拉伸适用于主链柔性的聚酰亚胺。特别是对于主链为线性的柔性PI（PMDA/3.4 '-ODA），该方法的效果最好。2.利用染料的吸收二向色性研究了PAA和PI的单轴分子取向与PAA膜拉伸比的关系。二向色光谱表明，刚性PI（BPDA/PDA）在微拉伸PAA（BPDA/PDA）膜的热亚胺化过程中发生了自发分子取向。利用该装置和PI薄膜拉伸技术，正在进行芳香族PI分子纤维和分子导线的研制。

项目成果

M,Hasegawa,M.Kochi et al.: "Spontaneous Molecular Orientation of Polyimides Indnced by Thermal Imidigation,I.Vniaxial Stretching of Polyamic Acid Film" J.of Polym,Sci:Part B:Polym,Phys.(in press). 32. (1)-(5) (1994)

M,Hasekawa,M.Kochi 等人：“由热酰亚​​胺引发的聚酰亚胺的自发分子取向，聚酰胺酸薄膜的垂直拉伸”J.of Polym,Sci:Part B:Polym,Phys.（出版中）。

M.Kochi et al.(分担): "Advancesin Polyimide Science and Technology" Technomic, 706 (1994)

M.Kochi 等人（撰稿人）：“聚酰亚胺科学与技术的进展”Technomic，706 (1994)

古知 政勝 (分担執筆): "「プラスチックフィルムの延伸技術と評価」II章8節ポリイミドフィルム延伸の技術と科学" 技術情報協会, 17 (1992)

高知正胜（撰稿人）：《塑料薄膜的拉伸技术与评价》第二章第8节拉伸聚酰亚胺薄膜的技术与科学，技术信息协会，17（1992）

古知政勝(分担): "ポリイミド最近の進歩1992" レイテック, 96 (1993)

Masakatsu Kochi（撰稿人）：“1992 年聚酰亚胺的最新进展” Raytech，96 (1993)

M.Kochi et al.(分担): "Advances in Polyimide Science and Technology" Technomic, 706 (1993)

M.Kochi 等人（撰稿人）：“聚酰亚胺科学与技术的进展”Technomic，706 (1993)