SYNTHESIS AND CHARACTERIZATION OF SOLUBLE POLYIMIDES CONTAINING PERFLUOROCYCLOBUTANE RINGS

LI Si; LI Hongqi; MENG Weidong; QING Fengling

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SYNTHESIS AND CHARACTERIZATION OF SOLUBLE POLYIMIDES CONTAINING PERFLUOROCYCLOBUTANE RINGS

Research Article | 更新时间：2021-03-19

- SYNTHESIS AND CHARACTERIZATION OF SOLUBLE POLYIMIDES CONTAINING PERFLUOROCYCLOBUTANE RINGS
- Acta Polymerica Sinica Issue 2, Pages: 114-118(2007)
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- Published：20 February 2007，
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LI Si, LI Hongqi, MENG Weidong, QING Fengling. SYNTHESIS AND CHARACTERIZATION OF SOLUBLE POLYIMIDES CONTAINING PERFLUOROCYCLOBUTANE RINGS. [J]. Acta Polymerica Sinica (2):114-118(2007)
DOI：

LI Si, LI Hongqi, MENG Weidong, QING Fengling. SYNTHESIS AND CHARACTERIZATION OF SOLUBLE POLYIMIDES CONTAINING PERFLUOROCYCLOBUTANE RINGS. [J]. Acta Polymerica Sinica (2):114-118(2007) DOI：

摘要

以乙酰氨基苯酚为原料

经过BrCF2CF2Br氟烷基化、Zn催化脱卤、热环化二聚

以及水解去保护

合成了一种含全氟环丁烷环的二胺单体1

4-六氟-1

2-双［4-(氨基)苯氧基］环丁烷.用该单体分别与酯环二酐双环［2.2.1］辛烷-2

6-四羧基2

6-二酐（BHDA）、芳香性二酐3

3′

4′-联苯四酸二酐(BPDA)和3

3′

4′-二苯酮四酸二酐(BTDA)通过“一步法”制备了3种新型含全氟环丁烷环聚酰亚胺.通过粘度测试、溶解性实验、FT-IR、热失重分析（TGA）和差热扫描量热（DSC）分析等手段

对所合成的聚酰亚胺的结构与性能进行了表征.结果显示该类聚酰亚胺可溶于大多数常用极性有机溶剂

热分解温度高于480℃

其中两种聚合物玻璃化温度低于150℃

表明含全氟环丁烷环聚酰亚胺具有良好的溶解性和可加工性.

Abstract

Polyimides containing perfluorocyclobutane rings were synthesized from a new diamine 1

4-hexafluoro-1

2-bis(4-aminophenoxy)cyclobutane with three dianhydrides

namely bicyclo［2.2.1］octane-2

6-tetracarboxylic 2

6-dianhydride (BHDA)

biphenyltetracarboxylic dianhydride (BPDA) and benzophenone-3

3′

4′-tetracarboxylic dianhydride (BTDA)

respectively.The new diamine was synthesized via fluoroalkylation of 4-acetamidophenol with BrCF2CF2Br followed by Zn-mediated elimination and exothermic cyclodimerization.The polymers were characterized by means of FT-IR

inherent viscosity

solubility determination

differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).TGA studies indicated that the polymers were all stable up to 480℃.DSC results show that two of the three polymers have a Tg below 150℃.The polymers were found to be soluble in the commonly used polar solvents.Thus the polymers containing perflurocyclobutane rings exhibited excellent solubility and processability.

关键词

全氟环丁烷环聚酰亚胺合成表征

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Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials Sichuan, Sichuan University

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