Synthesis and characterization of molecular structure

Jérôme, Robert; Mazurek, M.

doi:10.1007/978-94-009-1461-2_1

Cited by 5 publications

(2 citation statements)

References 151 publications

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“…The amount of ionic groups within the polymer can be varied over a broad range, higher concentrations being of interest with regard to proton or ion conductivity as polymer electrolytes, while low amounts of up to 10 mol % find applications in orthotics, prosthetics, as coatings of golf balls or as adhesives, to name a few. − An industrially relevant example is Surlyn, a copolymer of ethylene and methacrylic acid developed by DuPont . Both the amount of polar comonomer and the percentage of acid group neutralization allow for a fine-tuning of the polymer properties.…”

Section: Introductionmentioning

confidence: 99%

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Recyclable and Degradable Ionic-Substituted Long-Chain Polyesters

Staiger

Mecking

2023

ACS Sustainable Chem. Eng.

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Ionic groups can endow apolar polymers like polyethylene with desirable traits like adhesion with polar compounds. While ethylene copolymers provide a wide range of tunability via the carboxylate content and neutralization with different cations, they lack degradability or suitability for chemical recycling due to their all-carbon backbones. Here, we report ioncontaining long-chain polyesters with low amounts of ionic groups (M n = 50−60 kg/mol, <0.5 mol % of ionic monomers) which can be synthesized from plant oils and exhibit HDPE-like character in their structural and mechanical properties. In the sulfonic acid as well as neutralized sulfonate-containing polyesters, the nature of the cation counterions (Mg 2+ , Ca 2+ , and Zn 2+ ) significantly impacts the mechanical properties and melt rheology. Acid-containing polyesters exhibit a relatively high capability to absorb water and are susceptible to abiotic degradation. Enhanced surface wettability is reflected by facilitation of printing on films of these polymers. Depolymerization by methanolysis to afford the neat long-chain monomers demonstrates the suitability for chemical recycling. The surface properties of the neutralized sulfonate-containing polyesters are enhanced, showing a higher adsorption capability. Our findings allow for tuning the properties of recyclable polyethylene-like polymers and widen the scope of these promising materials.

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Section: Introductionmentioning

confidence: 99%

“… 8 − 11 An industrially relevant example is Surlyn, a copolymer of ethylene and methacrylic acid developed by DuPont. 12 Both the amount of polar comonomer and the percentage of acid group neutralization allow for a fine-tuning of the polymer properties.…”

Section: Introductionmentioning

confidence: 99%

Recyclable and Degradable Ionic-Substituted Long-Chain Polyesters

Staiger

Mecking

2023

ACS Sustainable Chem. Eng.

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Sol-Gel Packaging for Electrochemical Devices

Jitianu

Gambino

Klein

2012

Sol-Gel Processing for Conventional and Alternative Energy

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Linear Viscoelastic and Uniaxial Extensional Rheology of Alkali Metal Neutralized Sulfonated Oligostyrene Ionomer Melts

2011

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The linear viscoelastic and nonlinear extensional behavior of melts of alkali metal salts of oligomeric sulfonated polystyrene (SPS) ionomers were characterized by dynamic shear and nonlinear, uniaxial extensional flow experiments. The oligomeric SPS had a weight-average molecular weight of 4000 g/mol, a polydispersity index of 1.06, and a degree of sulfonation of 6.5 mol %. The molecular weight was below the entanglement molecular weight of PS, so all rheological effects were due to association of the ionic dipoles and nanophase separation of the ionic species that provides a transient elastic network. The SPS salts exhibited linear viscoelastic properties similar to well-entangled polystyrene (PS) melts, with a distinct rubbery region that had a shear modulus comparable to that of high molecular weight PS. Time−temperature superposition failed as a consequence of overlapping relaxations for the terminal response of the chain and ion hopping of the ionic dipoles. Unlike entangled PS melts, the modulus of the ionomer increased with increasing extensional strain rate, and a maximum in the stress occurred at a relatively low Hencky strain that was nearly independent of strain rate. The maximum in the stress during stretching was attributed to a catastrophic failure of the physical ionic network. At sufficiently high stress, the chains can pull the ionic groups out of nanophase-separated ionic domains, which significantly disrupts the network microstructure.

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Synthesis and characterization of molecular structure

Cited by 5 publications

References 151 publications

Recyclable and Degradable Ionic-Substituted Long-Chain Polyesters

Recyclable and Degradable Ionic-Substituted Long-Chain Polyesters

Sol-Gel Packaging for Electrochemical Devices

Linear Viscoelastic and Uniaxial Extensional Rheology of Alkali Metal Neutralized Sulfonated Oligostyrene Ionomer Melts

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