Journal
MACROMOLECULAR REACTION ENGINEERING
Volume 16, Issue 3, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mren.202100044
Keywords
lactone; microware irradiation; modeling; ring opening polymerization
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Funding
- Direccion General de Asuntos del Personal Academico (DGAPA)
- Universidad Nacional Autonoma de Mexico (UNAM), Mexico [PAPIIT IV100119, IG100122]
- Consejo Nacional de Ciencia y Tecnologia (CONACYT, Mexico)
- DGTIC-UNAM [LANCAD-UNAM-DGTIC-316]
- Facultad de Quimica [PAIP 5000-9078]
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A kinetic study was conducted on the mathematical modeling of polymerization rate and molar mass development in the ring opening bulk polymerization of lactones under microwave irradiation. Two modeling approaches were compared, with one focusing on average properties and the other on full molar mass distributions. The enhancement of polymerization rate under microwave irradiation was captured well by a non-thermal microwave effect modeling approach.
A kinetic study on the mathematical modeling of polymerization rate and molar mass development in the ring opening bulk polymerization (ROP) of lactones under microwave irradiation (MI), for the production of biodegradable green polymers used in the biomedical sector, is presented. Two modeling approaches, one based on calculation of average properties using a self-developed code based on the method of moments, and the other one providing calculation of full molar mass distributions with the aid of the Predici software are contrasted. The observed enhancement on polymerization rate under MI is captured well by using a non-thermal microwave effect modeling approach, namely, a microwave-enhanced propagation model. The proposed approach is validated with available experimental data for ROP of epsilon-caprolactone, a monomer which can be obtained from biomasses, using benzyl alcohol (BzOH) and stannous octoate (SnOc)(2) as initiator and catalyst, respectively, at 150 degrees C. Seven case studies are analyzed, including ROPs carried out under both conventional heating (CH) and MI. The effect of initiator and alcohol initial concentrations on polymerization rate and molar mass distributions is analyzed. The advantages of using MI in ROP are assessed.
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