Paper Title:
Synthesis and Characterization of Novel Amphiphilic Helical Copolymer
  Abstract

The new comb-copolymers [polyacetylene–MPEG (polyethylene glycol monomethyl ether)] were synthesized with (nbd)Rh+[η6-C6H5B- (C6H5)3] as catalyst. The copolymers with moderate molecular weights (Mn) (13000-170000) and yields (31.6-47.3%) exhibited higher optical activities compared with chiral monomer, which accorded with the “Chiral Amplification” effect. The optical activity of the copolymers gradually decreased as the amount of MPEG increased. The maximum amounts of MPEG for successful copolymerization and optical activity of copolymers were 40%, 30%, 20%(mol%) as the Mn of MPEG was 350, 750,1900, respectively. The optical activity of copolymers could change at external environmental stimulation, e.g., decreased as methanol content increased.

  Info
Periodical
Advanced Materials Research (Volumes 239-242)
Edited by
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Pages
1711-1716
DOI
10.4028/www.scientific.net/AMR.239-242.1711
Citation
D. M. Yue, D. Zhao, T. Yu, W. M. Wang, L. Q. Zhang, "Synthesis and Characterization of Novel Amphiphilic Helical Copolymer", Advanced Materials Research, Vols. 239-242, pp. 1711-1716, 2011
Online since
May 2011
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$32.00
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