Synthesis and characterization of well-defined comb-like branched polymers |
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| Authors: | Aixiang LI Zaijun LU Zijian LU |
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| Affiliation: | (1) School of Material Science and Engineering, Shandong University of Technology, Zibo, 255049, China;(2) School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China;(3) Teaching Affairs Department, Shandong University of Technology, Zibo, 255049, China |
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| Abstract: | Well-defined comb-like branched polymers having one branch in each repeating unit have been successfully synthesized by the
coupling reaction of living polystyrene (PS) and polyisoprene (PI) anions with 1, 1-diphenylethenyl (DPE) groups along PS
backbone prepared via atom transfer radical polymerization (ATRP) of 4-vinylbenzyloxy benzophenone (Sc) followed by Wittig
reaction. The resulting comb-like branched polymers were characterized by IR, 1H-NMR, gel permeation chromatography (GPC) and static light scattering (SLS) in detail. The effect of living chains and DPE
group molar ratio on grafting efficiency was discussed. The results show the coupling reaction of living chains and DPE groups
was highly effective, and the coupling efficiency can be controlled via the feed molar ratios of living chains and DPE groups.
Moreover, the effect of molecular weights of backbone (PSe) and PSLi or PILi on grafting efficiency was also discussed. The
results show that when excess living polymers were used, the almost quantitative grafting efficiency could be achieved.
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Translated from Acta Polymerica Sinica (China), 2007, (3): 203–208 译自: 高分子学报] |
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| Keywords: | atom transfer radical polymerization living anionic polymerization coupling reaction comb-like branched polymer |
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