Volume 214, Issue 15 pp. 1688-1698
Full Paper

Polymerization Mechanism of MMA in the Presence of 1,1-Diphenylethylene

Minjian Zhao

Minjian Zhao

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

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Dong Chen

Dong Chen

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

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Yan Shi

Corresponding Author

Yan Shi

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.Search for more papers by this author
Wantai Yang

Wantai Yang

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

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Zhifeng Fu

Zhifeng Fu

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

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First published: 04 July 2013
Citations: 10

Abstract

A suitable controlled polymerization mechanism of methyl methacrylate (MMA) in the presence of 1,1-diphenylethylene (DPE) is presented. The PMMAs with different molecular weight are prepared and the structures of the polymers are characterized by NMR spectroscopy and ESI-Q-TOF-MS. The good agreements between the theoretical and the experimental m/z values of PMMA samples acquired by ESI-Q-TOF-MS provide positive evidence to confirm that only one DPE unit is incorporated into the PMMA macromolecule chains. TEMPO is used as a radical scavenger to capture the active free radicals generated by the scission of the DPE-containing PMMA polymer. The molecular weight of the DPE-containing PMMA decreases dramatically after the reaction with TEMPO; meanwhile, the DPE molecule is split from the DPE-containing PMMA.

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