Dynamics of Poly(methyl methacrylate) in Ionic Liquids with Different Concentration and Cationic Structures

Huan Luo; Xi He; Gang Liu; Yan-Hua Niu; Guang-Xian Li

doi:10.1007/s10118-022-2840-z

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Dynamics of Poly(methyl methacrylate) in Ionic Liquids with Different Concentration and Cationic Structures

RESEARCH ARTICLE | Updated：2023-01-06

- Dynamics of Poly(methyl methacrylate) in Ionic Liquids with Different Concentration and Cationic Structures
- Dynamics of Poly(methyl methacrylate) in Ionic Liquids with Different Concentration and Cationic Structures
- 高分子科学（英文版） 2023年41卷第2期页码：315-324
- Affiliations：
  
  College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, China
- Author bio：
  
  yhniu@scu.edu.cn (Y.H.N.)
  guangxianli@scu.edu.cn (G.X.L.)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51873125, 52073184 and 51721091), and Scientific Research Foundation of International Cooperation and Exchanges of Sichuan Province (No. 2019YFH0027).;Electronic supplementary information (ESI) is available free of charge in the online version of this article at http://doi.org/10.1007/s10118-022-2840-z.
- DOI：10.1007/s10118-022-2840-z
  中图分类号：
- 收稿：2022-04-30，
  
  修回：2022-6-30，
  
  录用：2022-7-14，
  
  网络首发：2022-10-09，
  
  纸质出版：2023-02-01
- Accepted：
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Luo, H.; He, X.; Liu, G.; Niu, Y. H.; Li, G. X. Dynamics of poly(methyl methacrylate) in ionic liquids with different concentration and cationic structures. Chinese J. Polym. Sci. 2023, 41, 315–324

Huan Luo, Xi He, Gang Liu, et al. Dynamics of Poly(methyl methacrylate) in Ionic Liquids with Different Concentration and Cationic Structures[J]. Chinese Journal of Polymer Science, 2023, 41(2): 315-324.
Luo, H.; He, X.; Liu, G.; Niu, Y. H.; Li, G. X. Dynamics of poly(methyl methacrylate) in ionic liquids with different concentration and cationic structures. Chinese J. Polym. Sci. 2023, 41, 315–324 DOI： 10.1007/s10118-022-2840-z.

Huan Luo, Xi He, Gang Liu, et al. Dynamics of Poly(methyl methacrylate) in Ionic Liquids with Different Concentration and Cationic Structures[J]. Chinese Journal of Polymer Science, 2023, 41(2): 315-324. DOI： 10.1007/s10118-022-2840-z.

摘要

Compared with the traditional MIL

DIL could play a role as physical cross-links among PMMA chains by hydrogen bonding between PMMA and imidazolium rings. The additional physical network tends to form at high DIL content

due to the probability of physical cross-links formation increases with increasing DIL concentration.

Abstract

The dynamic behavior of entangled poly(methyl methacrylate) (PMMA) chains in both the traditional monocationic ionic liquid (MIL) and synthetic dicationic ionic liquid (DIL) with the same anion bis[(trifluoromethyl)sulfonyl]imide ([TFSI]

−

) has been examined over the wide composition range using differential scanning calorimetry and rheological measurements. PMMA/DIL and PMMA/MIL systems exhibit two glass transitions in the midrange of composition due to self-concentration effects. PMMA in DIL shows slower relaxation behavior

however

after the iso-free-volume correction

the terminal relaxation time

of PMMA in both the DIL and MIL presents the power law behavior

with exponent

conforming to experimental results for conventional polymer solutions (

=2.0±0.2). At high ILs concentration (70%)

the entanglement molecular weight

of PMMA/DIL system is lower than that of PMMA/MIL system owing to the formation of additional physical network in DIL

while the difference of

is reversed at low ILs content. The composition dependence might be related to the fact that the probability of formation of physical cross-linking points in linked double imidazolium ring increases with the increase of DIL content. The recovered creep strain of PMMA/DIL is almost 18 times of PMMA/MIL

exhibiting significantly better viscoelastic behavior.

关键词

Keywords

references

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