Tailoring Pore Structure and Properties of Functionalized Porous Polymers by Cyclotrimerization

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• 作者：Florian M. Wisser ; Kai Eckhardt ; Dorothea Wisser ; Winfried B枚hlmann ; Julia Grothe ; Eike Brunner ; Stefan Kaskel
• 刊名：Macromolecules
• 出版年：2014
• 出版时间：July 8, 2014
• 年：2014
• 卷：47
• 期：13
• 页码：4210-4216
• 全文大小：404K
• ISSN：1520-5835

文摘

Porous polymers were prepared by cyclotrimerization reaction in molten p-toluenesulfonic acid. Their properties could be tailored by functionalization of the aromatic diacetyl monomers. Thus, a range of homo- and copolymers based on hydrogen-, amine-, or nitro-functionalized 4,4鈥?diacetylbiphenyl derivatives and 1,4-diacetylbenzene was synthesized. The pores size could be tuned from mainly microporous to hierarchical micro- and mesoporous or even hierarchical micro- and macroporous. BET surface areas up to 720 m²/g and total pore volumes up to 1.76 cm³/g were achieved. The formation of different pore types was related to the solvent鈥搈onomer/polymer interactions, which is shown by ¹⁵N solid state MAS NMR spectroscopy and SEM. Other physical properties such as surface polarity and thermal stability were influenced by the different monomers as well.