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SCIENCE CHINA Chemistry, Volume 61, Issue 3: 319-327(2018) https://doi.org/10.1007/s11426-017-9146-6

Can Flory-Stockmayer theory be applied to predict conventional free radical polymerization of multivinyl monomers? A study via Monte Carlo simulations

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  • ReceivedAug 9, 2017
  • AcceptedSep 15, 2017
  • PublishedDec 26, 2017

Abstract

The conventional free radical polymerization (FRP) of multivinyl monomers (MVMs) inevitably leads to gelation even at low monomer conversion resulting in difficulties to control and monitor the reaction process. Flory and Stockmayer (F-S theory) studied it based on two fundamental assumptions: (1) independent and equivalent vinyl groups; (2) no intramolecular cyclization. However, until now its applicability to FRP of MVMs (especially regarding the extent of intramolecular cyclization) is still controversial. In this paper, Monte Carlo simulations are used to study FRP of divinyl monomers by two kinetic models: with/without cyclization models. The results of the simulations are compared with the calculated gel points based on F-S theory and the experimental data. It is found that the intramolecular cyclization has a negligible impact on the polymerization process and the gel point before gelation, which are in agreement with the prediction by F-S theory, but the effect becomes significant above the gel points.


Funded by

National Natural Science Foundation of China(51573129)


Acknowledgment

This work was supported by the National Natural Science Foundation of China (51573129), Science Foundation Ireland Principal Investigator Award (13/IA/1962), Investigator Award (12/IP/1688) and Health Research Board (HRA-POR-2013-412). This work was carried out at National Supercomputer Center in Tianjin, and the calculations were performed on TianHe-1 (A). The authors are very grateful to Prof. Krzysztof Matyjaszewski, Carnegie Mellon University, for his valuable comments and advice on this work.


Interest statement

The authors declare that they have no conflict of interest.


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