Tuning the Johari-Goldstein <italic style="font-style: italic">β</italic>-Relaxation and Its Separation from <italic style="font-style: italic">α</italic>-Relaxation of Poly(<italic style="font-style: italic">n</italic>-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds

Yuan-Biao Liu; Gao-Peng Shi; Guo-Zhang Wu

doi:10.1007/s10118-021-2595-y

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Tuning the Johari-Goldstein β-Relaxation and Its Separation from α-Relaxation of Poly(n-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds

ARTICLE | Updated：2021-07-05

- Tuning the Johari-Goldstein β-Relaxation and Its Separation from α-Relaxation of Poly(n-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds
- Tuning the Johari-Goldstein β-Relaxation and Its Separation from α-Relaxation of Poly(n-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds
- Chinese Journal of Polymer Science 2021年39卷第11期页码：1459-1469
- Affiliations：
  
  Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science & Engineering, East China University of Science & Technology, Shanghai 200237, China
- Author bio：
  
  wgz@ecust.edu.cn
- Funds：
  
  This study was financially supported by the National Natural Science Foundation of China (Nos. 51873063 and 51373053).
- DOI：10.1007/s10118-021-2595-y
  中图分类号：
- 收稿：2021-02-07，
  
  修回：2021-4-10，
  
  录用：2021-4-20，
  
  网络首发：2021-07-05，
  
  纸质出版：2021-09-18
- Accepted：
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Liu, Y. B.; Shi, G. P.; Wu, G. Z. Tuning the Johari-Goldstein β-relaxation and its separation from α-relaxation of poly(n-alkyl methacrylate)s by small molecule-bridged hydrogen bonds. Chinese J. Polym. Sci. 2021, 39, 1459–1469

Yuan-Biao Liu, Gao-Peng Shi, Guo-Zhang Wu. Tuning the Johari-Goldstein β-Relaxation and Its Separation from α-Relaxation of Poly(n-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds[J]. Chinese Journal of Polymer Science, 2021, 39(11): 1459-1469. DOI: 10.1007/s10118-021-2595-y.
Liu, Y. B.; Shi, G. P.; Wu, G. Z. Tuning the Johari-Goldstein β-relaxation and its separation from α-relaxation of poly(n-alkyl methacrylate)s by small molecule-bridged hydrogen bonds. Chinese J. Polym. Sci. 2021, 39, 1459–1469 DOI： 10.1007/s10118-021-2595-y.

Yuan-Biao Liu, Gao-Peng Shi, Guo-Zhang Wu. Tuning the Johari-Goldstein β-Relaxation and Its Separation from α-Relaxation of Poly(n-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds[J]. Chinese Journal of Polymer Science, 2021, 39(11): 1459-1469. DOI: 10.1007/s10118-021-2595-y. DOI：

摘要

Abstract

Introducing small molecule-bridged hydrogen bonds (HBs) between polymer chains has been reported to effectively reduce the inter-chain cooperativity despite of strengthening the intermolecular interaction. Here

a systematic investigation on tuning the Johari-Goldstein

(

) relaxation by adding various low-molecular-weight phenols in poly(

-alkyl methacrylate)s is carried out to further clarify the anomalous dynamics. Given these small molecules capable of coupling the motion with pendent groups of host polymers due to forming at least two HBs per molecule

poly(

-alkyl methacrylate) mixtures exhibit rich dynamic changes in the

-properties and

separations. An increased loading of phenols with a small size and strong inter-HB strength (Δ

) clearly benefits for significant retardation and suppression of the

-relaxation

narrows the

separation and converges the

-peak with the

-peak

which demonstrates the alleviation of inter-chain topological constraints. However

small molecules with a relatively big size and weak Δ

are found to amplify the magnitude of the

separation of poly(butyl methacrylate)

even though experimental results of changes in

-dispersion and dynamic fragility confirm a reduction of the coupling factor

in all of these hybrids. The counterintuitive phenomenon suggests that the crossover time

in the Coupling Model is no longer a universal quantity if the inter-chain interaction of polymers is strengthened by HBs. These compelling findings shed vital insights into the HB-induced anomalous dynamics

and provide essential guidance for tailoring the

behavior and designing glassy polymeric materials.

关键词

Keywords

references

Ribelles, J. G.; Duenas, J. M.; Pradas, M. M . Dielectric relaxations in poly(methyl acrylate), poly(ethyl acrylate), and poly(butyl acrylate) . J. Appl. Polym. Sci. , 1989 . 38 1145 - 1157 . DOI: 10.1002/app.1989.070380612 http://doi.org/10.1002/app.1989.070380612 .

Shi, G.; Liu, Y.; Wu, G . β fast Relaxation governs the damping stability of acrylic polymer/hindered phenol hybrids . Macromolecules , 2020 . 53 4692 - 4703 . DOI: 10.1021/acs.macromol.0c00255 http://doi.org/10.1021/acs.macromol.0c00255 .

Johari, G. P.; Goldstein, M . Viscous liquids and the glass transition. II. Secondary relaxations in glasses of rigid molecules . J. Chem. Phys. , 1970 . 53 2372 - 2388 . DOI: 10.1063/1.1674335 http://doi.org/10.1063/1.1674335 .

Johari, G. P.; Goldstein, M . Viscous liquids and the glass transition. III. Secondary relaxations in aliphatic alcohols and other nonrigid molecules . J. Chem. Phys. , 1971 . 55 4245 - 4252 . DOI: 10.1063/1.1676742 http://doi.org/10.1063/1.1676742 .

Molinero, V.; Goddard III, W. A . Microscopic mechanism of water diffusion in glucose glasses . Phys. Rev. Lett. , 2005 . 95 045701 DOI: 10.1103/PhysRevLett.95.045701 http://doi.org/10.1103/PhysRevLett.95.045701 .

Guo, J. H. A theoretical and experimental study of additive effects of physical aging and antiplasticization on the water permeability of polymer film coatings. J. Pharm. Sci. 1994, 83 , 447-449.

Burgess, S. K.; Lee, J. S.; Mubarak, C. R.; Kriegel, R. M.; Koros, W. J. Caffeine antiplasticization of amorphous poly(ethylene terephthalate): effects on gas transport, thermal, and mechanical properties. Polymer 2015, 65 , 34-44.

Light, R. R.; Seymour, R. W. Effect of sub- T g relaxations on the gas transport properties of polyesters. Polym. Eng. Sci. 1982, 22 , 857-864.

Priestley, R. D.; Rittigstein, P.; Broadbelt, L. J.; Fukao, K.; Torkelson, J. M . Evidence for the molecular-scale origin of the suppression of physical ageing in confined polymer: fluorescence and dielectric spectroscopy studies of polymer-silica nanocomposites . J. Phys.: Condens. Matter , 2007 . 19 205120 DOI: 10.1088/0953-8984/19/20/205120 http://doi.org/10.1088/0953-8984/19/20/205120 .

Shamblin, S. L.; Tang, X.; Chang, L.; Hancock, B. C.; Pikal, M. J . Characterization of the time scales of molecular motion in pharmaceutically important glasses . J. Phys. Chem. B , 1999 . 103 4113 - 4121 . .

Johari, G.; Kim, S.; Shanker, R. M . Dielectric relaxation and crystallization of ultraviscous melt and glassy states of aspirin, ibuprofen, progesterone, and quinidine . J. Pharm. Sci. , 2007 . 96 1159 - 1175 . DOI: 10.1002/jps.20921 http://doi.org/10.1002/jps.20921 .

Vyazovkin, S.; Dranca, I . Physical stability and relaxation of amorphous indomethacin . J. Phys. Chem. B , 2005 . 109 18637 - 18644 . DOI: 10.1021/jp052985i http://doi.org/10.1021/jp052985i .

Yu, H.; Wang, W.; Bai, H.; Wu, Y.; Chen, M . Relating activation of shear transformation zones to β relaxations in metallic glasses . Phys. Rev. B , 2010 . 81 220201 DOI: 10.1103/PhysRevB.81.220201 http://doi.org/10.1103/PhysRevB.81.220201 .

Wang, Q.; Zhang, S.; Yang, Y.; Dong, Y.; Liu, C.; Lu, J. Unusual fast secondary relaxation in metallic glass. Nat. Commun. 2015, 6 , 1-6.

Zhao, Z.; Wen, P.; Wang, W.; Shek, C . Observation of secondary relaxation in a fragile Pd 40 Ni 10 Cu 30 P 20 bulk metallic glass . Appl. Phys. Lett. , 2006 . 89 071920 DOI: 10.1063/1.2337876 http://doi.org/10.1063/1.2337876 .

Yu, H.; Samwer, K.; Wang, W.; Bai, H . Chemical influence on β -relaxations and the formation of molecule-like metallic glasses . Nat. Commun. , 2013 . 4 2204 DOI: 10.1038/ncomms3204 http://doi.org/10.1038/ncomms3204 .

Zhao, Z.; Wen, P.; Shek, C.; Wang, W . Measurements of slow β -relaxations in metallic glasses and supercooled liquids . Phys. Rev. B , 2007 . 75 174201 DOI: 10.1103/PhysRevB.75.174201 http://doi.org/10.1103/PhysRevB.75.174201 .

Yu, H.; Samwer, K.; Wu, Y.; Wang, W . Correlation between β relaxation and self-diffusion of the smallest constituting atoms in metallic glasses . Phys. Rev. Lett. , 2012 . 109 095508 DOI: 10.1103/PhysRevLett.109.095508 http://doi.org/10.1103/PhysRevLett.109.095508 .

Zhu, Z.; Li, Y.; Wang, Z.; Gao, X.; Wen, P.; Bai, H.; Ngai, K. L.; Wang, W . Compositional origin of unusual β -relaxation properties in La-Ni-Al metallic glasses . J. Chem. Phys. , 2014 . 141 084506 DOI: 10.1063/1.4893954 http://doi.org/10.1063/1.4893954 .

Stachurski, Z. Micromechanics of stress relaxation in amorphous glassy PMMA. Part I. Molecular model for anelastic behaviour. Polymer 2002, 43 , 7419-7427.

Pfister, L.; Stachurski, Z . Micromechanics of stress relaxation in amorphous glassy PMMA part II: application of the RT model . Polymer , 2002 . 43 7409 - 7417 . DOI: 10.1016/S0032-3861(02)00689-4 http://doi.org/10.1016/S0032-3861(02)00689-4 .

Wind, M.; Graf, R.; Renker, S.; Spiess, H. W. Structural reasons for restricted backbone motion in poly ( n -alkyl methacrylates): degree of polymerization, tacticity and side-chain length. Macromol. Chem. Phys. 2005, 206 , 142-156.

Shahin Thayyil, M.; Ngai, K. L.; Prevosto, D.; Capaccioli, S. Revealing the rich dynamics of glass-forming systems by modification of composition and change of thermodynamic conditions. J. Non-Cryst. Solids 2015, 407 , 98-105.

de Deus, J. F.; Souza, G. P.; Corradini, W. A.; Atvars, T. D.; Akcelrud, L . Relaxations of poly(methyl methacrylate) probed by covalently attached anthryl groups . Macromolecules , 2004 . 37 6938 - 6944 . DOI: 10.1021/ma049941c http://doi.org/10.1021/ma049941c .

Talhavini, M.; Atvars, T. D. Z.; Schurr, O.; Weiss, R. G . Translocation of fluorescent probes upon stretching low-density polyethylene films. Comparison between ‘free’ and covalently-attached anthryl groups . Polymer , 1998 . 39 3221 - 3232 . .

Casalini, R.; Snow, A.; Roland, C. Temperature dependence of the Johari–Goldstein relaxation in poly(methyl methacrylate) and poly(thiomethyl methacrylate). Macromolecules 2012, 46 , 330-334.

Casalini, R.; Roland, C. Effect of crosslinking on the secondary relaxation in polyvinylethylene. J. Polym. Sci., Part B: Polym. Phys. 2010, 48 , 582-587.

Redondo-Foj, B.; Sanchis, M. J.; Ortiz-Serna, P.; Carsí, M.; García, J. M.; García, F. C . The effect of cross-linking on the molecular dynamics of the segmental and β Johari-Goldstein processes in polyvinylpyrrolidone-based copolymers . Soft Matter , 2015 . 11 7171 - 7180 . DOI: 10.1039/C5SM00714C http://doi.org/10.1039/C5SM00714C .

Redondo-Foj, B.; Carsi, M.; Ortiz-Serna, P.; Sanchis, M.; Vallejos, S.; García, F.; García, J . Effect of the dipole-dipole interactions in the molecular dynamics of poly(vinylpyrrolidone)-based copolymers . Macromolecules , 2014 . 47 5334 - 5346 . DOI: 10.1021/ma500800a http://doi.org/10.1021/ma500800a .

Kahle, S.; Korus, J.; Hempel, E.; Unger, R.; Höring, S.; Schröter, K.; Donth, E . Glass-Transition Cooperativity Onset in a Series of Random copolymers poly( n -butyl methacrylate-stat-styrene) . Macromolecules , 1997 . 30 7214 - 7223 . DOI: 10.1021/ma961933b http://doi.org/10.1021/ma961933b .

Lorthioir, C.; Alegria, A.; Colmenero, J . Out of equilibrium dynamics of poly(vinyl methyl ether) segments in miscible poly(styrene)-poly(vinyl methyl ether) blends . Phys. Rev. E , 2003 . 68 031805 DOI: 10.1103/PhysRevE.68.031805 http://doi.org/10.1103/PhysRevE.68.031805 .

Bedrov, D.; Smith, G. D . A molecular dynamics simulation study of relaxation processes in the dynamical fast component of miscible polymer blends . Macromolecules , 2005 . 38 10314 - 10319 . DOI: 10.1021/ma0517392 http://doi.org/10.1021/ma0517392 .

Blochowicz, T.; Rössler, E . Beta relaxation versus high frequency wing in the dielectric spectra of a binary molecular glass former . Phys. Rev. Lett. , 2004 . 92 225701 DOI: 10.1103/PhysRevLett.92.225701 http://doi.org/10.1103/PhysRevLett.92.225701 .

Ngai, K. L. Relaxation and diffusion in complex systems . Springer New York: 2011 , p.232−247.

Capaccioli, S.; Paluch, M.; Prevosto, D.; Wang, L.; Ngai, K. L. Many-body nature of relaxation processes in glass-forming systems. J. Phys. Chem. Lett. 2012 , 3 , 735-743.

Ngai, K. L. Coupling model explanation of salient dynamic properties of glass-forming substances. IEEE T. Dielect. El. In. 2001, 8 , 329-344.

Ngai, K. L.; Rendell, R. W. Cooperative dynamics in relaxation: a coupling model perspective. J. Mol. Liq. 1993, 56 , 199-214.

Alvarez, F.; Alegra, A.; Colmenero, J . Relationship between the time-domain Kohlrausch-Williams-Watts and frequency-domain Havriliak-Negami relaxation functions . Phys. Rev. B , 1991 . 44 7306 - 7312 . DOI: 10.1103/PhysRevB.44.7306 http://doi.org/10.1103/PhysRevB.44.7306 .

Ngai, K. L.; Gopalakrishnan, T. R.; Beiner, M . Relaxation in poly(alkyl methacrylate)s: Change of intermolecular coupling with molecular structure, tacticity, molecular weight, copolymerization, crosslinking, and nanoconfinement . Polymer , 2006 . 47 7222 - 7230 . DOI: 10.1016/j.polymer.2006.06.072 http://doi.org/10.1016/j.polymer.2006.06.072 .

Roland, C.; Ngai, K. L. Constraint dynamics and chemical structure. J. Non-Cryst. Solids 1994 , 172 , 868-875.

Pan, D.; Sun, Z . Influence of chain stiffness on the dynamical heterogeneity and fragility of polymer melts . J. Chem. Phys. , 2018 . 149 234904 DOI: 10.1063/1.5052153 http://doi.org/10.1063/1.5052153 .

Shinyashiki, N.; Spanoudaki, A.; Yamamoto, W.; Nambu, E.; Yoneda, K.; Kyritsis, A.; Pissis, P.; Kita, R.; Yagihara, S . Segmental relaxation of hydrophilic poly(vinylpyrrolidone) in chloroform studied by broadband dielectric spectroscopy . Macromolecules , 2011 . 44 2140 - 2148 . DOI: 10.1021/ma102394s http://doi.org/10.1021/ma102394s .

Alegria, A.; Colmenero, J.; Ngai, K. L.; Roland, C . Observation of the component dynamics in a miscible polymer blend by dielectric and mechanical spectroscopies . Macromolecules , 1994 . 27 4486 - 4492 . DOI: 10.1021/ma00094a009 http://doi.org/10.1021/ma00094a009 .

Meier, G.; Vlassopoulos, D.; Fytas, G. Phase Separation and Glass Transition Intervention in a Polymer Blend. EPL 1995, 30 , 325-330.

Park, H.; Bradley, P.; Greisen, P.; Liu, Y.; Mulligan, V. K.; Kim, D. E.; Baker, D.; DiMaio, F . Simultaneous optimization of biomolecular energy functions on features from small molecules and macromolecules . J. Chem. Theory Comput. , 2016 . 12 6201 - 6212 . DOI: 10.1021/acs.jctc.6b00819 http://doi.org/10.1021/acs.jctc.6b00819 .

Cui, W.; Li, J.; Decher, G . Self-Assembled Smart Nanocarriers for Targeted Drug Delivery . Adv. Mater. , 2016 . 28 1302 - 1311 . DOI: 10.1002/adma.201502479 http://doi.org/10.1002/adma.201502479 .

Cordier, P.; Tournilhac, F.; Soulié-Ziakovic, C.; Leibler, L. Self-healing and thermoreversible rubber from supramolecular assembly. Nature 2008, 451 , 977-980.

Weis, P.; Wu, S . Light-switchable azobenzene-containing macromolecules: from UV to near infrared . Macromol. Rapid Commun. , 2018 . 39 1700220 DOI: 10.1002/marc.201700220 http://doi.org/10.1002/marc.201700220 .

Kuang, X.; Zhou, Y.; Shi, Q.; Wang, T.; Qi, H. J . Recycling of epoxy thermoset and composites via good solvent assisted and small molecules participated exchange reactions . ACS Sustain. Chem. Eng. , 2018 . 6 9189 - 9197 . DOI: 10.1021/acssuschemeng.8b01538 http://doi.org/10.1021/acssuschemeng.8b01538 .

Lin, Y.; Xu, C.; Guan, A.; Wu, G. Tailoring the temperature-dependent viscoelastic behavior of acrylic copolymers by introducing hydrogen bonding interactions. Polymer 2019, 161 , 190−196.

Shi, G.; Yin, X.; Wu, G. Thermodynamic phase analysis of acrylic polymer/hindered phenol hybrids: effects of hydrogen bonding strength. Polymer 2018, 153 , 317−324.

Yin, X.; Liu, C.; Lin, Y.; Guan, A.; Wu, G . Influence of hydrogen bonding interaction on the damping properties of poly( n -butyl methacrylate)/small molecule hybrids . J. Appl. Polym. Sci. , 2015 . 132 41954 .

Painter, P. C.; Graf, J. F.; Coleman, M. M . Effect of hydrogen bonding on the enthalpy of mixing and the composition dependence of the glass transition temperature in polymer blends . Macromolecules , 1991 . 24 5630 - 5638 . DOI: 10.1021/ma00020a023 http://doi.org/10.1021/ma00020a023 .

Liu, C.; Yin, X.; Lin, Y.; Guan, A.; Wu, G. Small molecule-mediated glass transition of acrylic copolymers: effect of hydrogen bonding strength on glass transition temperature. J. Polym. Sci., Part B: Polym. Phys. 2015, 53 , 400-408.

Zhang, S. H.; Jin, X.; Painter, P. C.; Runt, J . Dynamic homogeneity in mixtures of poly(vinyl methyl ether) with low molecular weight phenolic molecules . Macromolecules , 2003 . 36 7179 - 7188 . DOI: 10.1021/ma034738n http://doi.org/10.1021/ma034738n .

Liu, Y.; Shi, G.; Wu, G . Hydrogen bonding-induced anomalous dynamics of polyacrylates mixed with small molecules . Polymer , 2020 . 201 122627 DOI: 10.1016/j.polymer.2020.122627 http://doi.org/10.1016/j.polymer.2020.122627 .

Liu, C.; Liu, Z.; Yin, X.; Wu, G . Tuning the dynamic fragility of acrylic polymers by small molecules: the interplay of hydrogen bonding strength . Macromolecules , 2015 . 48 4196 - 4206 . DOI: 10.1021/acs.macromol.5b00489 http://doi.org/10.1021/acs.macromol.5b00489 .

Masser, K. A.; Runt, J . Dynamics of polymer blends of a strongly interassociating homopolymer with poly(vinyl methyl ether) and poly(2-vinylpyridine) . Macromolecules , 2010 . 43 6414 - 6421 . DOI: 10.1021/ma1011396 http://doi.org/10.1021/ma1011396 .

Zhang, S.; Painter, P. C.; Runt, J . Coupling of component segmental relaxations in a polymer blend containing intermolecular hydrogen bonds . Macromolecules , 2002 . 35 9403 - 9413 . DOI: 10.1021/ma0210832 http://doi.org/10.1021/ma0210832 .

Carsi, M.; Sanchis, M.; Diaz-Calleja, R.; Riande, E.; Nugent, M . Effect of cross-linking on the molecular motions and nanodomains segregation in polymethacrylates containing aliphatic alcohol ether residues . Macromolecules , 2012 . 45 3571 - 3580 . DOI: 10.1021/ma202811p http://doi.org/10.1021/ma202811p .

Havriliak, S.; Negami, S. A complex plane analysis of α -dispersions in some polymer systems. J. Polym. Sci., Part C: Polym. Symp. 1966, 14 , 99-117.

Zhang, S.; Runt, J . Segmental dynamics and ionic conduction in poly(vinyl methyl ether)−lithium perchlorate complexes . J. Phys. Chem. B , 2004 . 108 6295 - 6302 . DOI: 10.1021/jp0499777 http://doi.org/10.1021/jp0499777 .

Bergman, R.; Alvarez, F.; Alegrıa, A.; Colmenero, J. Dielectric relaxation in PMMA revisited. J. Non-Cryst. Solids 1998, 235 , 580-583.

Bergman, R.; Alvarez, F.; Alegrıa, A.; Colmenero, J . The merging of the dielectric α - and β -relaxations in poly(methyl methacrylate) . J. Chem. Phys. , 1998 . 109 7546 - 7555 . DOI: 10.1063/1.477376 http://doi.org/10.1063/1.477376 .

Shuster, M.; Narkis, M.; Siegmann, A . Polymeric antiplasticization of polycarbonate with polycaprolactone . Polym. Eng. Sci. , 1994 . 34 1613 - 1618 . DOI: 10.1002/pen.760342106 http://doi.org/10.1002/pen.760342106 .

Stukalin, E. B.; Douglas, J. F.; Freed, K. F . Plasticization and antiplasticization of polymer melts diluted by low molar mass species . J. Chem. Phys. , 2010 . 132 084504 DOI: 10.1063/1.3304738 http://doi.org/10.1063/1.3304738 .

Cicerone, M. T.; Douglas, J. F . β -Relaxation governs protein stability in sugar-glass matrices . Soft Matter , 2012 . 8 2983 - 2991 . DOI: 10.1039/c2sm06979b http://doi.org/10.1039/c2sm06979b .

Schröter, K.; Unger, R.; Reissig, S.; Garwe, F.; Kahle, S.; Beiner, M.; Donth, E . Dielectric spectroscopy in the αβ splitting region of glass transition in poly(ethyl methacrylate) and poly( n -butyl methacrylate): different evaluation methods and experimental conditions . Macromolecules , 1998 . 31 8966 - 8972 . DOI: 10.1021/ma9713318 http://doi.org/10.1021/ma9713318 .

Garwe, F.; Schonhals, A.; Beiner, M.; Schroter, K.; Donth, E . Molecular cooperativity against locality at glass transition onset in poly( n -butyl methacrylate) . J. Phys.: Condens. Matter , 1994 . 6 6941 - 6945 . DOI: 10.1088/0953-8984/6/35/005 http://doi.org/10.1088/0953-8984/6/35/005 .

Angell, C. A. Formation of glasses from liquids and biopolymers. Science 1995, 267 , 1924-1935.

Ngai, K. L.; Capaccioli, S . Relation between the activation energy of the Johari-Goldstein β relaxation and T g of glass formers . Phys. Rev. E , 2004 . 69 031501 DOI: 10.1103/PhysRevE.69.031501 http://doi.org/10.1103/PhysRevE.69.031501 .

Ngai, K. L. Relaxation and diffusion in complex systems . Springer: New York. 2011 , p.63−73.

Afandak, A.; Eslami, H . Ion-pairing and electrical conductivity in the ionic liquid 1- n -butyl-3-methylimidazolium methylsulfate [Bmim][MeSO 4 ]: molecular dynamics Simulation study . J. Phys. Chem. B , 2017 . 121 7699 - 7708 . DOI: 10.1021/acs.jpcb.7b06039 http://doi.org/10.1021/acs.jpcb.7b06039 .

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Tuning the Johari-Goldstein β-Relaxation and Its Separation from α-Relaxation of Poly(n-alkyl methacrylate)s by Small Molecule-bridged Hydrogen Bonds

DOI：10.1007/s10118-021-2595-y

摘要

Abstract

关键词

Keywords

references