Chemical Research in Chinese Universities

, Volume 34, Issue 5, pp 828–832 | Cite as

Ceiling Degree of Polymerization for Brush Polymers Prepared via ROMP of Poly(tert-Butyl Acrylate) Macromonomers

  • Yaping Qiao
  • Xiaoyan Yuan
  • Yunhui Zhao
  • Lixia RenEmail author


Controlled preparation of brush polymers is important in the design of functional materials. In this study, poly(tert-butyl acrylate) macromonomers functionalized with norbornenyl end group(NB-PtBA) were synthesized via atom transfer radical polymerization in three different molecular weights, 2000(NB-PtBA-2k), 3000(NB-PtBA-3k), and 8000(NB-PtBA-8k). Additionally, brush polymers with PtBA as side chains were synthesized via ring-opening metathesis polymerization(ROMP). Kinetic studies on ROMP of NB-PtBA showed that there was a ceiling degree of polymerization(CDP) for the brush polymers, beyond which the polymerization of NB-PtBA was out of control. For brush polymers of P[NB-PtBA-2k] and P[NB-PtBA-3k], CDPs were estimated to be ca. 400, but the value of P[NB-PtBA-8k] was ca. 100. Therefore, the controlled ROMP of brush polymers was critical at the CDP limit with increased macromonomer molecular weight.


Ring-opening metathesis polymerization Macromonomer Brush polymer Ceiling degree of polymeriza-tion Kinetics study 


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Supplementary material

40242_2018_8126_MOESM1_ESM.pdf (378 kb)
Ceiling Degree of Polymerization for Brush Polymers Prepared via ROMP of Poly(tert-Butyl Acrylate) Macromonomers


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Copyright information

© Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Yaping Qiao
    • 1
  • Xiaoyan Yuan
    • 1
  • Yunhui Zhao
    • 1
  • Lixia Ren
    • 1
    Email author
  1. 1.School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjinP. R. China

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