用4,4′-二氨基二苯醚（ODA）作为二胺,3,3′,4,4′-二苯醚四羧酸二酐（ODPA）及2,2-双[4-（3,4-二羧基苯氧基）苯基]丙烷二酐（BPADA）作为二酐,以N,N-二甲基甲酰胺（DMF）为溶剂,通过常规的两步法,合成了可溶性共聚聚酰亚胺。用红外光谱（FT-IR）、差示扫描量热（DSC）、热重分析（TGA）、溶解性测试和拉伸测试对聚合物的结构和性能进行了表征。结果表明,在1780 cm-1、1720 cm-1和744 cm-1左右出现了聚酰亚胺的特征吸收峰。在常见有机溶剂中可溶,并且有很好的热稳定性,在氮气氛中,玻璃化转变温度（Tg）为221.1℃,起始降解温度512.4℃,800℃质量保持率为53.5%。共聚聚酰亚胺膜的拉伸强度、拉伸模量、断裂伸长率分别为138.7 MPa、1.76 GPa和55.0%。
A soluble copolyimide was synthesized via the conventional two-step by using 4,4′-diaminodiphenyl ether（ODA） as the diamine monomer,bisphenol A dianhydride（BPADA） and 4,4′-oxydiphthalic dianhydride（ODPA） as the dianhydride monomers in dimethylformamide（DMF）.The structure and performance of polymer were characterized by Fourier transform infrared spectrum（FT-IR）,viscosity testing,solubility testing,differential scanning calorimetry（DSC）,thermogravimetric analysis（TGA） and tensile tests.The results show that there are characteristic peaks of polyimides around 1780 cm-1、1720 cm-1 and 744 cm-1.The resulting is soluble in common organic solvents.It has good thermal stability with glass transition temperature of 221.1℃ and decomposition temperature at initial above 512.4℃,and the residue at 800℃ of 53.5% in nitrogen atmosphere.The copolyimide film has tensile strengths,tensile modulus,and elongations at break of 138.7MPa,1.76 GPa,and 55.0% respectively.
参考文献
| [1] | Wang, CY;Li, G;Jiang, JM .Synthesis and properties of fluorinated poly(ether ketone imide)s based on a new unsymmetrical and concoplanar diamine: 3,5-Dimethyl-4-(4-amino-2-trifluoromethylphenoxy)-4 '-aminobenzophenone[J].Polymer: The International Journal for the Science and Technology of Polymers,2009(7):1709-1716. |
| [2] | Fang, YQ;Wang, JA;Zhang, Q;Zeng, Y;Wang, YH .Synthesis of soluble polyimides for vertical alignment of liquid crystal via one-step method[J].European Polymer Journal,2010(5):1163-1167. |
| [3] | 程茹,朱梦冰,黄培.热和化学亚胺化对ODPA/ODA聚酰亚胺薄膜性能的影响[J].材料工程,2007(07):51-54,58. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%