Journal
MACROMOLECULES
Volume 52, Issue 19, Pages 7386-7395Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.9b01581
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Funding
- National Natural Science Foundation of China (NSFC) [51603093]
- Natural Science Foundation of Jiangsu Province [BK 20160515]
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We report a new AB-type benzoxazine monomer, containing both maleimide and furan groups, which exhibits diversified polymerization mechanisms rather than the common single linear polymerization or ring-opening polymerization that leads to cross-linked structures. In addition, the polybenzoxazine obtained directly from the thermally activated polymerization shows higher thermal stability and lower flammability than the one based on the main-chain-type precursor. This is observed as an exception in benzoxazine chemistry because the other reported thermosets derived from main-chain-type benzoxazines generally possess higher performance compared with ones from monomers. More importantly, the varied polymerization mechanisms discovered in this single-component AB-type benzoxazine have cast new light on both benzoxazine chemistry and the Diels-Alder reaction.
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