白桦素
微型多孔材料
聚酯纤维
单体
缩聚物
聚合物
材料科学
化学工程
高分子化学
有机化学
吸附
异山梨酯
树皮(声音)
高分子科学
化学
吸附
物理
声学
工程类
作者
Jekaterina Jeromenok,Winfried Böhlmann,Markus Antonietti,Jens Weber
标识
DOI:10.1002/marc.201100532
摘要
Abstract Betulin, an abundant triterpene, can be extracted from birch bark and can be used as a renewable monomer in the synthesis of microporous polyesters. Cross‐linked networks and hyperbranched polymers are accessible by an A 2 + B 3 reaction, with betulin being the A 2 monomer and B 3 being a trifunctional acid chloride. Reaction of betulin with a diacid dichloride results in linear, soluble polyesters. The present communication proves that the polyreaction follows the classic schemes of polycondensation reactions. The resulting polymers are analyzed with regard to their micro‐porosity by gas sorption, NMR spectroscopy, and X‐ray scattering methods. The polymers feature intrinsic microporosity, having ultrasmall pores, which makes them candidates for gas separation membranes, e.g., for the separation of CO 2 from N 2 .
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