| 3,4'-ODA-ODA-PMDA聚合物的性能 |
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| 引用本文： | 赵婷燕,董云飞,俞娟,黄培.3,4'-ODA-ODA-PMDA聚合物的性能[J].南京工业大学学报(自然科学版),2012,34(2):44-47. |
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| 作者姓名： | 赵婷燕 董云飞 俞娟 黄培 |
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| 作者单位： | 南京工业大学化学化工学院,材料化学工程国家重点实验室,江苏南京210009 |
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| 摘 要： | 为了考察分子结构对聚酰亚胺性能的影响,在4,4’-二氨基二苯醚-均苯四甲酸二酐(ODA-PMDA)型聚酰亚胺中引入具有不对称结构的单体3,4'-二氨基二苯醚(3,4'-ODA),制备共聚改性均苯型聚酰胺酸,经热亚胺化得到所需聚酰亚胺.分别用全反射红外光谱仪(FT-IR)、静态热机械分析仪(TMA)、同步热分析仪(TGA)和万能试验机对聚合物性能进行表征.结果表明:随着聚合物中不对称结构单体3,4’- ODA的引入,在保持聚合物优良的耐热性能的同时,溶解性能得到明显改善,玻璃化温度降至314℃,拉伸强度和拉伸模量分别降至91.33和1536 MPa,加工性能有所提高.
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| 关 键 词： | 聚酰亚胺 不对称结构 3 4-二氨基二苯醚 |
Properties of polyimides for 3,4'-ODA-ODA-PMDA |
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| ZHAO Tingyan
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DONG Yunfei
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YU Juan
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HUANG Pei.Properties of polyimides for 3,4'-ODA-ODA-PMDA[J].Journal of Nanjing University of Technology,2012,34(2):44-47. |
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| Authors: | ZHAO Tingyan DONG Yunfei YU Juan HUANG Pei |
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| Institution: | (State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemistry and Chemical Engineering, Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | The polyimide was synthesized from asymmetrical monomer 3,4′-oxydianiline(3,4′-ODA),4,4′-Oxydianiline(ODA) and pyromellitic dianhydride(PMDA) by one-step procedure,to investigate the effect of structure symmetry on the properties of polyimides(PI).The properties of polyimides were characterized by Fourier transform infrared spectroscopy(FT-IR),thermomechanical analysis(TMA),thermogravimetric analysis(TGA),and universal tester.Results showed that asymmetry enhanced the solubility in organic solvents,reduced the glass transition temperature to 314 ℃,the tensile strength to 91.33 MPa,and elastic modulus to 1 536 MPa.Thus,mechanical properties of PI were improved. |
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| Keywords: | polyimide asymmetric structure 3 4′-oxydianiline |
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