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 shu

Monomer reactivity ratios for fluoroacrylate and butyl methacrylate in miniemulsion copolymerizations initiated by potassium persulphate

College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou 310027, China

Received Date: 12 June 2008

Fund Project: The authors gratefully acknowledge financially supported by National Natural Science Foundation of China (Nos. 20576117 and 20806067) and China Postdoctoral Science Foundation (No. 20070420230).

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, r_BMA=0.74, r_HFMA=0.87 and r_BMA=0.73, r_TFMA=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.
- Fluoroacrylate,
- Reactivity ratios,
- Miniemulsion,
- Copolymerization
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