Synthesis of Aromatic Polymers Precursors

4,4′-BPDA was obtained from China Tech Chemical Co., Ltd. (Tianjin, China), and dried at 250 °C under vacuum prior to use. N-Methylpyrrolidone (NMP), m-cresol, and ethanol were purchased from Energy Chemical Co., Ltd. (Shanghai, China). m-cresol and NMP were distilled over calcium hydride and stored in argon-purged bottles. All other chemicals were obtained from J&K Scientific Ltd. (Beijing, China) and were used as received. The synthesis methods of Br-BPDA [30 (link)], MMBMA, MMBDA [31 (link)], TBDA1, TBDA2 [12 (link)], and DAT [32 (link)] came from publications.

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Li Y., Lu Y., Tian C., Wang Z, & Yan J. (2024). Intrinsically Microporous Polyimides Derived from 2,2′-Dibromo-4,4′,5,5′-bipohenyltetracarboxylic Dianhydride for Gas Separation Membranes. Polymers, 16(9), 1198.

Publication 2024

m-cresol ethanol

Corresponding Organization :

Other organizations : Zhejiang University of Technology, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Zhengzhou University

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Variable analysis

independent variables

Obtaining 4,4'-BPDA from China Tech Chemical Co., Ltd. (Tianjin, China)
Drying 4,4'-BPDA at 250 °C under vacuum prior to use
Purchasing N-Methylpyrrolidone (NMP), m-cresol, and ethanol from Energy Chemical Co., Ltd. (Shanghai, China)
Distilling m-cresol and NMP over calcium hydride and storing in argon-purged bottles
Obtaining all other chemicals from J&K Scientific Ltd. (Beijing, China) and using them as received

dependent variables

Not explicitly mentioned

control variables

Drying 4,4'-BPDA at 250 °C under vacuum prior to use
Distilling m-cresol and NMP over calcium hydride and storing in argon-purged bottles

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