Synthesis of star polymethyl acrylate by SET-LRP at ambient temperature |
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Authors: | Wei Ding Chongfu Lv Ying Sun Huoxin Luan Tao Yu Guangmiao Qu |
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Affiliation: | (1) Provincial Key Laboratory of Oil & Gas Chemical Technology, Chemistry and Chemical Engineering College of Northeast Petroleum University, Daqing, 163318, China;(2) Guangfa Chemical Industry of DaTong Coal Mine Group Co., Ltd, Datong, 037003, China |
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Abstract: | The star-shaped polymethyl acrylate (PMA) was synthesized by single electron transfer living radical polymerization (SET-LRP)
at 30 °C in dimethyl sulfoxide, using 2,2-dibromomethyl-1,3-dibromopropane as the multifunctional initiator, Cu0 powder and tris-(2-dimethylamino ethyl)amine (Me6-TREN) as catalyst. The structure of polymer was analyzed by 1H NMR, and the results showed that the star-shaped PMA had perfect chain ends (–Br) retention. In addition, the polymerization
proceeded smoothly and the time dependence of ln(M]0/M]) was linear, which could indicate a first order propagation rate with respect to both radicals and monomer concentration,
the polymerization was the living polymerization. The M
n and M
w/M
n of polymer were being measured by Gel Permeation Chromatography. The k
papp = 0.0367 h−1 and the conversion was 36.3% at 16 h, meanwhile the M
nGPC of the polymer was 13,300 and the M
w/M
n was 1.40. |
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Keywords: | |
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