Citation: Li-bin Bai, Rong-rong Zheng, Wen-liang Li, Yong-gang Wu, Xin-wu Ba, Hai-jun Wang. A SYNTHETIC APPROACH FOR WATER SOLUBLE HYPERBRANCHED POLY(N,N-ETHYLIDENEBIS(N-2-CHLOROACETYL ACRYLAMIDE)) WITH HIGH DEGREE OF BRANCHING VIA ATOM TRANSFER RADICAL POLYMERIZATION/SELF-CONDENSING VINYL POLYMERIZATION[J]. Chinese Journal of Polymer Science, ;2013, 31(7): 1038-1045. doi: 10.1007/s10118-013-1257-0 shu

A SYNTHETIC APPROACH FOR WATER SOLUBLE HYPERBRANCHED POLY(N,N-ETHYLIDENEBIS(N-2-CHLOROACETYL ACRYLAMIDE)) WITH HIGH DEGREE OF BRANCHING VIA ATOM TRANSFER RADICAL POLYMERIZATION/SELF-CONDENSING VINYL POLYMERIZATION

Corresponding author: Xin-wu Ba,
Received Date: 31 August 2012
Revised Date: 16 November 2012

Fund Project: This work was financially supported by National Natural Science Foundation of China (Nos. 20904008 and 21274037) and Science and Technology Foundation of Hebei Education Department (grant Nos. 2010015 and 2009307).

A novel acrylamide A2B2* (A=alkene, B*=alkyl chlorine) type inimer was obtained from commercially available 1,2-ethylenediamine, chloroacetyl chloride and acryloyl chloride. The as-prepared monomer can form water-soluble hyperbranched poly(N,N-ethylidene bis(N-2-chloroacetyl acrylamide))s (HPECA) through atom transfer radical polymerization/self-condensing vinyl polymerization method in the presence alkyl chlorine/CuCl/2,2-bipyridine activation system which can effectively suppress the gelation formation. 1H-NMR spectra and dual detector size exclusion chromatography proved the hyperbranched structure indisputably, and the degree of branching was determined by the detailed analyses of 1H-NMR spectra. The trend of the degree of branching was in consistent with the result of Mark-Houwink exponent a. The experiment results suggested that the conversion was 67%, Mw =13.2 104, Mark-Houwink a=0.282 and the degree of branching=64% when the reaction temperature was 120 oC, reaction time=168 h and N,N-ethylidene bis(N-2-chloroacetyl acrylamide):Cu(I)=50:0.62.
- Hyperbranched polymers
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