| 引用本文: | 马馨雨,刘立柱,张笑瑞,吕彤.热塑性共聚聚酰亚胺薄膜的合成及性能研究[J].材料科学与工艺,2019,27(3):47-52.DOI:10.11951/j.issn.1005-0299.20180030. |
| MA Xinyu,LIU Lizhu,ZHANG Xiaorui,LÜ Tong.Synthesis and performance of thermoplastic copolyimide film materials[J].Materials Science and Technology,2019,27(3):47-52.DOI:10.11951/j.issn.1005-0299.20180030. |
|
| 摘要: |
| 以2, 2′-二甲基-4, 4′-二氨基联苯(m-TB)为二胺单体，均苯四甲酸二酐(PMDA)和3, 3′, 4, 4′-联苯四甲酸二酐(BPDA)为二酐单体，N, N′-二甲基乙酰胺(DMAc)为溶剂，采用常规的两步法制备了一系列不同二酐比例的热塑性聚酰亚胺，并通过红外光谱仪、X-射线衍射仪、热重分析仪、紫外光谱仪、动态热分析仪、溶解性测试等对共聚聚酰亚胺的结构和性能进行表征.结果表明：在1 780、1 720、1 500、1 380、1 050和725 cm-1处出现明显的吸收峰，说明成功制备了聚酰亚胺材料；共聚聚酰亚胺只在PMDA与BPDA物质的量比为0.2:0.8时存在结晶峰，其他比例时均为非晶聚合物；亚胺化后的共聚聚酰亚胺在DMSO、DMAc、DMF、NMP和m-cresol中有溶解性，证明成功制备出热塑性聚酰亚胺薄膜；热塑性共聚PI起始分解温度大于500 ℃，800 ℃时的质量保持率在50%以上，具有良好的热稳定性；随着聚合物中BPDA含量的提高，热塑性聚酰亚胺薄膜的玻璃化转变温度呈现下降的趋势.当紫外光波长达到400 nm时，薄膜的透光率高达57.6%，当波长为760 nm时，薄膜透光率均达到100%，成功制备了透光率较高的聚酰亚胺薄膜. |
| 关键词: 共聚聚酰亚胺 热塑性 溶解性 耐热性 透光率 |
| DOI：10.11951/j.issn.1005-0299.20180030 |
| 分类号:O631.1 |
| 文献标识码:A |
| 基金项目: |
|
| Synthesis and performance of thermoplastic copolyimide film materials |
|
MA Xinyu1, LIU Lizhu1,2, ZHANG Xiaorui1,2, Lü Tong1
|
|
(1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China; 2. Key Laboratory of Engineering Dielectric and Its Application,Ministry of Education(Harbin University of Science and Technology), Harbin 150080, China)
|
| Abstract: |
| A series of thermoplastic copolyimides with different dianhydride ratios were synthesized via the conventional two-step method by using 2, 2′-dimethyl-4, 4′-diaminobiphenyl(m-TB) as the diamine monomer, and pyromellitic dianhydride(PMDA) and 3, 3′, 4, 4′-biphenyl tetracarboxylic dianhydride(BPDA) as the dianhydride monomer in N, N-dimethylacetamide. The structure and properties of the copolymerized polyimide were characterized by infrared spectrometer, X-ray diffractometer, thermogravimetric analyzer, ultraviolet spectrometer, dynamic thermal analyzer, and solubility test.Results show that there was obvious absorption at 1 780, 1 720, 1 500, 1 380, 1 050, and 725 cm-1, indicating thatthe polyimide material was successfully prepared. The copolymerized polyimide only had a crystallization peak when the ratio of PMDA to BPDA was 0.2:0.8, whilethe other proportions were all amorphous polymers. The imidized copolyimide had solubility in DMSO, DMAc, DMF, NMP, and m-cresol, suggesting that the thermoplastic polyimide film was successfully prepared. The thermoplastic copolyimide had good thermal stability when the initial decomposition temperature was higher than 500 ℃, and the residue at 800 ℃ was above 50%. With the increaseof BPDA content in the polyimide, the glass transition temperature showeda downward trend. The transmittance of the films reached 57.6% and 100% when the wavelength of ultraviolet light reached 400 nm and 760 nm, indicating that the polyimide film with high transmittance was successfully prepared. |
| Key words: copolyimide thermoplastic solubility heat resistance transmittance |
