Additive Effects of Lithium Salts with Various Anionic Species in Poly (Methyl Methacrylate)

Ito, Asae; Nitta, K.

doi:10.3390/molecules26134096

Cited by 6 publications

(12 citation statements)

References 27 publications

(44 reference statements)

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“…The mean relaxation time < τ F > in the flow zone for PMMA/Li-salts with the salt concentration at 0.07 mol/mol was estimated to be 0.40 s for PMMA, 0.63 s for PMMA doped with LiCF 3 SO 3 , and 180 s for PMMA doped with LiBr 13,20) . PMMA doped with LiBr shows a much longer < τ F > value than those of the pristine PMMA and PMMA/ LiCF 3 SO 3 .…”

Section: Effects Of the Anion Size On Glass Transition Behaviormentioning

confidence: 98%

“…An increase in T g was observed for these salt-doped samples. In addition, the infrared (IR) spectra of these samples suggest that ion-dipole interaction develops between the lithium cations and carbonyl groups of PMMA chains; moreover, these samples maintain a transparency above 80 % even under a salt ratio of 0.07 mol/mol 13) . Miyagawa et al reported that the transmittance of PMMA-salt complexes remains at approximately 90 % even over a salt ratio of 70 wt% 9) , so adding some lithium salts does not impair PMMA transparency.…”

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

“…This section summarizes the additive effects on PMMA of the lithium salts with larger anions. As for details in the materials and sample preparation, see the previous report 13) .…”

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

“…Figure 1 shows the dynLiamic mechanical spectra of PMMA doped with lithium perchlorate (LiClO 4 ), lithiumtrifluoro-acetate (LiCOOCF 3 ) and lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) 13) .…”

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

“…derived from LiClO 4 separate into two peaks at 623 and 633 cm -1 , which originate from the free anions and bound or contact ions (ion pairs), respectively 16) . The stretching The IR spectra were separated into the free anions, ion pairs, triplets, and the aggregated ions 13) .…”

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

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Rheological and Mechanical Properties of Poly(methyl methacrylate) Associated with Lithium Salts

Ito

Nitta

2022

J. Soc. Rheol., Jpn

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On the basis of the lithium electrolyte mechanism, modified glassy polymers were developed by adding lithium salts to poly(methyl methacrylate) (PMMA). This review summarizes how the rheological and mechanical properties of PMMA were changed by introducing various lithium salts: lithium perchlorate (LiClO 4 ), lithium trifluoroacetate (LiCOOCF 3 ), lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), lithium nonafluorobutanesulfonate (LiC 4 F 9 SO 3 ), and lithium bromide (LiBr). It was found that the rheological and mechanical properties of PMMA are dominated by the aggregation state of the salts in the matrix, the degree of bulkiness in anions, and anion size. This review focused on the "pinning" effect, which is attributed to the ion-dipole interaction between the lithium cations and PMMA molecular chains. This pinning effect was evaluated in the molten state during the molding, which directly affects the mechanical properties in the solid state. Therefore, the pinning, which depends on the anion species, affects not only the rheological and mechanical properties, but also the tensile properties of PMMA/Li-salts.

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Section: Effects Of the Anion Size On Glass Transition Behaviormentioning

confidence: 98%

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

“…This section summarizes the additive effects on PMMA of the lithium salts with larger anions. As for details in the materials and sample preparation, see the previous report 13) .…”

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

Section: Effects Of Non-free Ion Frac-tion On Glass Transition Behaviormentioning

confidence: 99%

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Rheological and Mechanical Properties of Poly(methyl methacrylate) Associated with Lithium Salts

Ito

Nitta

2022

J. Soc. Rheol., Jpn

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Universal Copolymerization of Crosslinked Polyether Electrolytes for All‐Solid‐State Lithium‐Metal Batteries

Lei,

Zhou,

Zhang

et al. 2024

Advanced Science

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Solid polymer electrolytes (SPEs) are pivotal in advancing the practical implementation of all‐solid‐state batteries. Poly(1,3‐dioxane) (PDOL)‐based electrolytes have attracted significant attention due to the pseudo‐high conductivity achieved through sophisticated in situ polymerization methods; however, such PDOL‐based electrolytes present challenges of crystallization over time and monomers residual during processing. In this study, integrating LiTFSI and LiDFOB as a universal copolymerization strategy for developing high‐performance PDOL electrolytes with a wide range of epoxy crosslinkers is proposed. It is discovered that this approach leverages the protective effects of TFSI anions on the boron active center and catalyzes polymer chain growth via crosslinking. The homogenously crosslinked (benzene‐centered) PDOL electrolyte exhibits remarkable thermo‐mechanical stability (up to 100 °C), high ion migration number (tLi+ = 0.42), a wide electrochemical window (≈5.0 V vs Li+/Li), and high ionic conductivity (4.5×10−4 S cm−1). Notably, the crosslinked PDOL electrolyte is in the all‐solid‐state with minimal monomer/oligomer residual, exhibiting no crystallization during relaxation, delivering a robust performance in all‐solid‐state lithium metal batteries.

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A nonequilibrium constitutive equation for the stress–strain behavior of water‐absorbed poly(methyl methacrylate)‐based materials

Ito

Shin

Nitta

2023

Polymer Engineering & Sci

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In this work, the water absorption effects on the tensile behavior of a poly(methyl methacrylate) (PMMA) doped with lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) was investigated. It was found that the water content in the PMMA/LiCF 3 SO 3 system could be controlled using the salt content because of the system's remarkable water absorbability. Moreover, it was found that a dried PMMA/LiCF 3 SO 3 is more brittle compared to a pristine PMMA; however, PMMA/LiCF 3 SO 3 samples containing high water level demonstrated high drawability. The brittle-to-ductile transition was represented using a kinetic mechanism in which water spots accumulated around salts were spread throughout a whole sample specimen and stretched to a homogeneously water-absorbed condition.

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Additive Effects of Lithium Salts with Various Anionic Species in Poly (Methyl Methacrylate)

Cited by 6 publications

References 27 publications

Rheological and Mechanical Properties of Poly(methyl methacrylate) Associated with Lithium Salts

Rheological and Mechanical Properties of Poly(methyl methacrylate) Associated with Lithium Salts

Universal Copolymerization of Crosslinked Polyether Electrolytes for All‐Solid‐State Lithium‐Metal Batteries

A nonequilibrium constitutive equation for the stress–strain behavior of water‐absorbed poly(methyl methacrylate)‐based materials

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