High-performance polyimide copolymer fibers derived from 5-anino-2-(2-hydroxy-4-aminobenzene)-benzoxazole: Preparation, structure and properties
文献类型：期刊论文
| 作者 | Dai, Xuemin1,2,3; Bao, Feng2; Jiao, Long2; Yao, Haibo2; Ji, Xiangling1; Qiu, Xuepeng2; Men, Yongfeng1 |
| 刊名 | POLYMER
 |
| 出版日期 | 2018-08-15 |
| 卷号 | 150页码:254-266 |
| 关键词 | Polyimide Fiber Phenylenebenzoxazole Hydroxyl Group Hydrogen Bonding |
| ISSN号 | 0032-3861 |
| DOI | 10.1016/j.polymer.2018.06.079 |
| 英文摘要 | A series of high-performance polyimide copolymer (co-PI) fibers containing phenylenebenzoxazole moiety with one hydroxyl group are synthesized based on the copolymerization of 3,3',4,4'-biphenyl tetracarboxylic dianhydride (BPDA) with two diamine monomers, namely, p-phenylenediamine (p-PDA) and 5-anino 2 (2 hydroxy-4-aminobenzene)-benzoxazole (p-mHBOA), through a two-step method. The molar ratio of p-PDA/p-mHBOA varies from 10/0 to 0/10. Influences of the p-mHBOA moieties on the thermal stability, crystal structure, crystal orientation, microvoid morphology, and mechanical properties are systemically investigated. Fourier transform infrared results confirm that intra/inter molecular hydrogen bonds come from the OH group and nitrogen atom of the benzoxazole group and/or OH group and the oxygen atom of the carbonyl group of cyclic imide. The glass transition temperatures (T(g)s) of coPI fibers are in the range of 290 degrees C-325 degrees C. The prepared fibers show excellent thermal stabilities, and their T5% is within 528 degrees C-542 degrees C in air. Two-dimensional wide-angle X-ray diffraction spectra indicate that homo-PI and co-PI fibers present a regularly arranged polymer chains along the fiber axial direction. Moreover, the ordered molecular packing along the transversal direction of fibers is destroyed by the copolymerization. Small-angle X-ray scattering results show that co-PI fibers with optimal mechanical properties exhibit the shortest average length (L) and the smallest radius (R) of microvoids. When the pmHBOA/p-PDA molar ratio is 5/5, the fracture strength and initial modulus can reach approximately 30.31 cN/dtex (4.40 GPa) and 894.88 cN/dtex (129.8 GPa), respectively. The relationship between structure and mechanical properties is also discussed. (C) 2018 Published by Elsevier Ltd. |
| 语种 | 英语 |
| WOS记录号 | WOS:000442535600026 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42373]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Qiu, Xuepeng; Men, Yongfeng |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Composites Engn Lab, Changchun 130022, Jilin, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, Xuemin,Bao, Feng,Jiao, Long,et al. High-performance polyimide copolymer fibers derived from 5-anino-2-(2-hydroxy-4-aminobenzene)-benzoxazole: Preparation, structure and properties[J]. POLYMER,2018,150:254-266. |
| APA | Dai, Xuemin.,Bao, Feng.,Jiao, Long.,Yao, Haibo.,Ji, Xiangling.,...&Men, Yongfeng.(2018).High-performance polyimide copolymer fibers derived from 5-anino-2-(2-hydroxy-4-aminobenzene)-benzoxazole: Preparation, structure and properties.POLYMER,150,254-266. |
| MLA | Dai, Xuemin,et al."High-performance polyimide copolymer fibers derived from 5-anino-2-(2-hydroxy-4-aminobenzene)-benzoxazole: Preparation, structure and properties".POLYMER 150(2018):254-266. |
入库方式： OAI收割
来源：化学研究所
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