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- W4382679887 abstract "Meldrum's acid mediated ketene chemistry (MAMKC) is applied to synthesis of poly(ester amide)s in this work. An MA-functionalized phenolic amide compound (MA_PhOH-Am) is synthesized from the reaction between a MA-functionalized amine and 3,4-dihydrocoumarine (DHC, a biomass-based chemical) through amine-lactone addition reaction. Polymerization of MA_PhOH-Am results in the corresponding poly(ester amide) (P(Es-Am)), through MA thermolysis reaction (generating the corresponding ketene groups) and ketene-phenol addition reaction. Both MA_PhOH-Am and P(Es-Am) have been characterized with spectral methods and thermal analysis. P(Es-Am) has an inherent viscosity of 0.49 dL g−1, a molecular weight of 76,500 Da, a glass transition temperature of 145°C (tanδ peak in dynamic mechanical analysis), a thermal stability of about 320°C, and a storage modulus at 50°C of 1.0 GPa. In the stress–strain measurement, P(Es-Am) exhibits a Young's modulus, a tensile strength, and an elongation at break of 10.6 ± 0.7 GPa, 165 ± 40 MPa, and 1.83 ± 0.41%, respectively. An effective approach for the synthesis of high-performance poly(ester amide)s has been demonstrated." @default.
- W4382679887 created "2023-07-01" @default.
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- W4382679887 creator A5041877079 @default.
- W4382679887 date "2023-06-30" @default.
- W4382679887 modified "2023-10-01" @default.
- W4382679887 title "Poly(ester amide)s from biomass‐based 3,4‐dihydrocoumarine through Meldrum's acid mediated ketene chemistry" @default.
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- W4382679887 doi "https://doi.org/10.1002/pol.20230344" @default.
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