Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties

Rui-Zhe Liu; Lei Zhang; Kun-Kun Guo; Jiang-Tao Xu

doi:10.1007/s10118-022-2689-1

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Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties

RESEARCH ARTICLE | Updated：2022-04-26

- Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties
- Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties
- Chinese Journal of Polymer Science 2022年40卷第5期页码：447-455
- Affiliations：
  
  a.School of Chemical Engineering, UNSW Sydney, NSW 2052, Australia
  b.College of Materials Science and Engineering, Hunan University, Changsha 410082, China
- Author bio：
  
  j.xu@unsw.edu.au
- Funds：
  
  J. X. acknowledges the Australian Research Council (ARC) and UNSW Sydney for the financial support under the schemes of Future Fellowship (No. FT160100095) and Startup Fund.
- DOI：10.1007/s10118-022-2689-1
  中图分类号：
- 收稿：2021-12-08，
  
  修回：2021-12-27，
  
  录用：2021-12-30，
  
  网络首发：2022-03-09，
  
  纸质出版：2022-05-01
- Accepted：
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Liu, R. Z.; Zhang, L.; Guo, K. K.; Xu, J. T. Precise pentamers with diverse monomer sequences and their thermal properties. Chinese J. Polym. Sci. 2022, 40, 447–455

Rui-Zhe Liu, Lei Zhang, Kun-Kun Guo, et al. Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties[J]. Chinese Journal of Polymer Science, 2022, 40(5): 447-455.
Liu, R. Z.; Zhang, L.; Guo, K. K.; Xu, J. T. Precise pentamers with diverse monomer sequences and their thermal properties. Chinese J. Polym. Sci. 2022, 40, 447–455 DOI： 10.1007/s10118-022-2689-1.

Rui-Zhe Liu, Lei Zhang, Kun-Kun Guo, et al. Precise Pentamers with Diverse Monomer Sequences and Their Thermal Properties[J]. Chinese Journal of Polymer Science, 2022, 40(5): 447-455. DOI： 10.1007/s10118-022-2689-1.

摘要

Abstract

Sequenced-defined oligomer has been emerged as one of the hot topics in polymer chemistry due to its capability of precisely controlling both chain length and monomer sequence. Recent efforts have focused on development of synthetic methodologies using state-of-the-art chemistry tools. However

investigating the impact of minor changes in monomer sequence on physical properties of these materials is still underdeveloped. Herein

four sequenced pentamers are synthesized by a reversible addition-fragmentation chain transfer (RAFT) single unit monomer insertion technique

in which a base pentamer possesses a relatively rigid backbone comprising of five cyclic monomer units. One of the cyclic units in this base pentamer is replaced by an acyclic monomer at different locations (the 1

and 5

unit) to produce three modified pentamers

which leads to a significant decrease of glass transition temperature (

) compared to the base pentamer. Meanwhile

the modified pentamers with identical primary structures but distinct monomer sequences also present different

values depending on the position of the acyclic monomer unit. The middle (3

) position of the acyclic unit causes profound decrease of

due to its increased molecular flexibility. These synthetic pentamers have been demonstrated to be excellent oligomeric plasticizers to modulate thermal transitions of bulk polymer materials.

关键词

Keywords

references

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