期刊
MACROMOLECULAR CHEMISTRY AND PHYSICS
卷 213, 期 7, 页码 784-788出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/macp.201200008
关键词
activation energy; d; l-lactide; microwave irradiation; ring-opening polymerization; thermal effects
资金
- French Ministry of Research
Ring-opening polymerization of D,L-lactide is critically reevaluated under both microwave dielectric heating and conventional conduction/convection heating in order to probe the nonexistence of nonthermal microwave effects. All experiments are conducted in toluene by resorting to a fiber-optic sensor that allows for accurate internal reaction temperature measurements. For a given temperature, the results obtained either with a temperature control microwave heating mode or with a power control procedure can well be reproduced through conventional thermal heating. Microwave irradiation does not induce any alteration of the polymerization kinetics or livingness, clearly demonstrating the absence of any specific nonthermal effect in the microwave-assisted process.
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