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Citation:
Qing Hua Zhang, Zhen Huan Luo, Xiao Li Zhan, Feng Qiu Chen. Monomer reactivity ratios for fluoroacrylate and butyl methacrylate in miniemulsion copolymerizations initiated by potassium persulphate[J]. Chinese Chemical Letters,
;2009, 20(4): 478-482.
doi:
10.1016/j.cclet.2008.12.041
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Miniemulsion copolymerization of butyl mathacrylate (BMA) with fluoroacrylate (HFMA, TFMA) was carried out at 70℃ by employing potassium persulphate (KPS) as initiator. Copolymer compositions at low conversion levels were determined by 1H NMR spectra techniques. The reactivity ratios were evaluated by employing Kellen-Tudos (K-T) methods, which yields the apparent reactivity ratios, rBMA=0.74, rHFMA=0.87 and rBMA=0.73, rTFMA=0.75, respectively, and Q-and e-values of HFMA and TFMAwere calculated by the Alfrey-Price method. The results show that HFMA and TFMA are more active than BMA, and the cross-propagation rate constant is greater than the self-propagation one in these two copolymerizations.
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Keywords:
- Fluoroacrylate,
- Reactivity ratios,
- Miniemulsion,
- Copolymerization
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