Ion-conducting polymers based on modified alternating maleic anhydride copolymer with oligo(oxyethylene) side chains

Ding, Liming; Shi, Jing; Yang, Cheng-Lin

doi:10.1016/s0379-6779(97)03817-4

Cited by 17 publications

(8 citation statements)

References 24 publications

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“…To fine-tune the water solubility, we grafted poly(ethylene glycol) side chains onto the polymer backbone by using the same one-pot synthesis described above. PEG is a water-soluble and biocompatible polymer that has already been used to modify different poly(maleic anhydride) copolymers of styrene , 1-hexene , and methyl vinyl ether . We thus prepared a PEG-modified analogue of copolymer 9 by adding a mixture of a poly(ethylene glycol) monomethyl ether (20 mol % with respect to the maleic anhydride unit) and 1 (80 mol %) to polymer 5 to afford conjugate 10 (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

Influence of the Backbone Structure on the Release of Bioactive Volatiles from Maleic Acid-Based Polymer Conjugates

et al. 2010

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Poly(maleic acid monoester)-based β-mercapto ketones were synthesized and investigated as potential delivery systems for the controlled release of bioactive, volatile, α,β-unsaturated enones (such as damascones and damascenones) by retro 1,4-addition. The bioconjugates were prepared in a one-pot synthesis using 2-mercaptoethanol as a linker. The thiol group of 2-mercaptoethanol adds to the double bond of the enone to form a β-mercapto ketone, which was then grafted via nucleophilic ring-opening of the remaining alcohol function onto a series of alternating copolymers of maleic anhydride and 1-octadecene, ethylene, isobutylene, and methyl vinyl ether. The influence of copolymer backbones on the release of δ-damascone was investigated in buffered aqueous solution as a function of pH and time. In the presence of a cationic surfactant, the polymer conjugates were transferred from an aqueous medium to a cotton surface. The deposition and the release of δ-damascone from the cotton surface as a function of the polymer backbone structure were measured by fluorescence spectroscopy and dynamic headspace analysis, respectively. All polymer conjugates were found to deliver higher amounts of the volatile into the headspace than the reference consisting of unmodified δ-damascone. Polymers with a hydrophobic backbone were generally efficiently deposited on the cotton surface, but released δ-damascone only moderately in solution. Conjugates with a more hydrophilic backbone release the active compound more efficiently in water, but are deposited to a lower extent onto the target surface. A good balance of the hydrophobicity and hydrophilicity of the polymer backbone is the key factor to maximize the deposition of the conjugates on the target surface and to optimize the release of the bioactive volatiles.

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Section: Resultsmentioning

confidence: 99%

Influence of the Backbone Structure on the Release of Bioactive Volatiles from Maleic Acid-Based Polymer Conjugates

et al. 2010

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“…This is far from the application requirement of a value above 10 −3 S cm −1 for lithium secondary batteries. To improve the ionic conductivity, random copolymers,15–17 graft copolymers,18,19 block copolymers,20,21 comb polymers,22–24 and hyperbranched polymers25–27 based on PEO have been designed to suppress the formation of crystal and, therefore, the ionic conductivity of SPEs based on these polymers was greatly improved.…”

Section: Introductionmentioning

confidence: 99%

Preparation and ionic conductive properties of all‐solid polymer electrolytes based on multiarm star block polymers

Ren

Chang

et al. 2012

J of Applied Polymer Sci

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A series of star block polymers with a hyperbranched core and 26 arms are successfully synthesized by atom transfer radical polymerization of styrene (St), and poly(ethylene glycol) methyl ether methacrylate from a hyperbranched polystyrene (HBPS) multifunctional initiator. All‐solid polymer electrolytes composed of these multiarm star polymers and lithium salts are prepared. The influences of polyoxyethylene (PEO) side‐chain length, PEO content, lithium salt concentration and type, and the structure of polymer on ionic conductivity are systematically investigated. The resulting polymer electrolyte with the longest PEO side chains exhibits the best ionic conductive properties. The maximum conductivity is 0.8 × 10−4 S cm−1 at 25°C with EO/Li = 30. All the prepared multiarm star block polymers possess good thermal stability. The mechanical property is greatly improved owing to the existence of polystyrene blocks in the multiarm star polymer molecules, and flexible films can be obtained by solution‐casting technique. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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“…Use of low molar mass polyethylene glycol dimethyl ethers (PEGDMEs) as plasticizers (30-40%) in the PEO matrix increased ambient temperature conductivities, but at the cost of significant reduction in the mechanical and interfacial properties [1]. Other approaches to increasing the room temperature (RT) conductivity of polyether electrolytes are by attachment of short-chain PEO oligomers as side chains to flexible [2][3][4][5][6][7][8][9][10] or rigid polymer backbones [11,12], network polyethers [13,14] and inorganic scaffolds [15,16].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

2008

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Ion-conducting polymers based on modified alternating maleic anhydride copolymer with oligo(oxyethylene) side chains

Cited by 17 publications

References 24 publications

Influence of the Backbone Structure on the Release of Bioactive Volatiles from Maleic Acid-Based Polymer Conjugates

Influence of the Backbone Structure on the Release of Bioactive Volatiles from Maleic Acid-Based Polymer Conjugates

Preparation and ionic conductive properties of all‐solid polymer electrolytes based on multiarm star block polymers

Preparation and characterization of composite electrolytes based on PEO(375)-grafted fumed silica

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