Abstract
Aromatic polymers such as poly(ether sulfone), poly(ether ketone), and polyimide have been widely used in industry due to their thermal, mechanical, and chemical stabilities. Although their application to catalysis has been limited, the introduction of a hyperbranched architecture to such aromatic polymers is effective in developing catalytic materials that combine the advantages of homogenous and heterogeneous catalysts. This review article overviews the recent progress on the design and synthesis of hyperbranched aromatic polymers. Several acid catalyzed reactions and the aerobic oxidation of alcohols have been demonstrated using hyperbranched aromatic polymers as catalysts. The advantage of hyperbranched polymers against linear polymers is also discussed.
Highlights
Aromatic polymers such as poly(ether sulfone), poly(ether ketone), and polyimide are well-known for their thermal, chemical, and mechanical stabilities
Our research presented a nitric acid–assisted carbon-catalyzed oxidation system (NACOS) using carbon-based group presented a nitric acid–assisted carbon-catalyzed oxidation system (NACOS) using materials as metal-free catalysts [38] and demonstrated that TEMPO enhanced this oxidation carbon-based materials as metal-free catalysts [38] and demonstrated that TEMPO enhanced this system [39]
One clear advantage of the application of these hyperbranched polymers is for use in catalysis
Summary
Aromatic polymers such as poly(ether sulfone), poly(ether ketone), and polyimide are well-known for their thermal, chemical, and mechanical stabilities. The development of catalytically active aromatic polymers will largely expand the applicability of organic and polymeric materials in catalysis. To develop catalytically active aromatic polymers, a hyperbranched architecture is of interest. The good solubility of hyperbranched polymers would guarantee good catalytic activity, they can be used as heterogeneous catalysts after immobilization onto insoluble supports such as carbon. In other words, hyperbranched polymers can combine the advantages of homogenous and heterogeneous catalysts of high catalytic activity and ease of separation. In other words, hyperbranched can combine the advantages of homogenous and catalyst materials for various reactions polymers such as esterification, hydrolysis of cellulose, and partial heterogeneous catalysts of high catalytic activity and ease of separation. This review article focused on thefor recent progress in the development of hyperbranched
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