Abstract
The acceleration effect of various agents on the rate of styrene bulk polymerization in 2,2,6,6-tetramethylpiperidinyloxy (TEMPO) mediated polymerization was investigated, including dimethyl malonate (DMM), diethyl methyl malonate (DEMM), diethyl tert-butylmalonate (DEBM), diethyl diethylmalonate (DEDEM), 3-methyl-2,4-pentanedione (MPD), acetyl malononitrile (Ac-MN), and dimethyl malononitrile (DM-MN). Polymerization with the additive proceeded in a living manner, as indicated by keeping a low polydispersity and increasing the molecular weight with the reaction time and conversion. The structure of the styrene polymerization did not change in the presence of these additives. The monomer conversion efficiency was approximately 99% and maintained a relatively narrow polydispersity of 1.29 with the optimal [Ac-MN]/[TEMPO] molar ratios of 4 in 1.5 h. With the accelerator, dipole/dipole interactions led to a weakening of the C-ON bond and an acceleration of the reaction. There is a trend for a higher polymerization rate with more electron-withdrawing substituents.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.