Synthesis and properties of new crosslinked polyurethane elastomers based on isosorbide

Oprea, Stefan; Potolinca, Violeta-Otilia; Oprea, Veronica

doi:10.1016/j.eurpolymj.2016.08.020

Cited by 52 publications

(39 citation statements)

References 26 publications

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“…[13][14][15][16] Since its accidental nding in the 1960s by Pomerantz et al, 17 anodic bonding has developed into the most widely used connection method for different kinds of materials in the preparation and packaging of Micro-Electro-Mechanical Systems (MEMS). [18][19][20] Furthermore, it has been recognized as a reliable and easy way to achieve rigid connections between electron-conductive materials and ion-conductive materials, of which the most reported materials are Si or metal bonded to borosilicate glass. 21,22 Because of the advantages of no joint ller requirement, low welding residual stress, excellent sealing and high connection strength, the proposed anodic bonding by applying a direct current (DC) potential and high temperature would form an intermediate bonding layer at the interfaces of different kinds of materials by electrochemical processes.…”

Section: Introductionmentioning

confidence: 99%

Conductive polyurethane elastomer electrolyte (PUEE) materials for anodic bonding

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Conductive polyurethane elastomer electrolyte (PUEE) materials for anodic bonding

et al. 2020

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“…. It was expected to achieve good mechanical properties via controlling the contents of urea or urethane units, adjusting the ratio between ―Si―O―Si― chains and urea or urethane units, selecting suitable chain extenders, and so on.…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon gave rise to the microphase separation in the block copolymer. 13 11,[14][15][16][17][18][19][20][21] It was expected to achieve good mechanical properties via controlling the contents of urea or urethane units, [22][23][24][25][26] adjusting the ratio between -Si-O-Sichains and urea or urethane units, 25,27,28 selecting suitable chain extenders, 29,30 and so on.…”

Section: Introductionmentioning

confidence: 99%

A new cross‐linked system of silicone rubber based on silicone‐polyurea block copolymer

Zhu

Sun

et al. 2018

Polymers for Advanced Techs

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A new cross‐linked system of silicone rubber (SR) was obtained from silicone‐polyurea block copolymers that was synthesized with aminopropyl terminated polydimethylsiloxane and (4‐isocyanatocyclohexyl)‐methane. SR possessed self‐reinforced and physical cross‐linked structure. It had better mechanical properties that the hardness, the tensile strength, and the elongation at break could reach 65 Shore A, 3.78 MPa, and 458% with the polyurea segment content ranging from 2.01% to 9.13% by weight. The hydrogen bond that led to the physical cross‐linked structure was proved byFourier transform infrared spectroscopy. The microphase separated structure that caused the self‐reinforcement was illustrated by scanning electron microscopy, X‐ray diffraction analysis, and dynamic mechanical analysis. Fourier transform infrared spectroscopy results showed the hydrogen bond formation between the polyurea units. Scanning electron microscopy, dynamic mechanical analysis, and X‐ray diffraction analysis results proved the microphase separation existed between polyurea units and ―Si―O―Si― chains. The increase of polyurea contents enhanced the binding of hydrogen bond and improved the extent of microphase separation. Accordingly, it decreased the thermal properties and lowered the glass transition temperature (Tg) from −108°C to −114°C. Also, the increase of polyurea contents increased the hydrophobicity of SR that the surface free energy could reach to −24.81 mN/m.

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“…Polyurethanes with heterocyclic structures exhibit improved thermal and mechanical properties that are useful in many practical applications. A lot of different heterocyclic derivatives have been used in the synthesis of polyurethanes, such as: sulfadiazine, pyridine, triazine, quinoline, pyrol, pyridazine, isosorbide …”

Section: Introductionmentioning

confidence: 99%

Biodegradation of pyridine‐based polyether polyurethanes by the Alternaria tenuissima fungus

Oprea¹,

Potolinca²,

Gradinariu

et al. 2017

J of Applied Polymer Sci

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The scope of the present work is to study the biodegradability behavior of several novel heterocyclic poly(ether urethanes) when their hard segments are subjected to exposure to the Alternaria tenuissima fungus. The heterocyclic poly(ether urethanes) were chain-extended with various pyridine derivatives that had different functional groups placed in different positions on the pyridine rings. Different ratios of the reactive components were also used. The measurements obtained by the use of the attenuated total reflectance-Fourier transform infrared spectroscopy revealed the different structural changes that occurred after exposure to fungi. The degradation process was analyzed through measurement of the mechanical properties and surface morphology evolution by scanning electron microscopy. The obtained results show that the nature and design of the functional groups on the pyridine ring determine the strength of the cohesion linkages that in turn influence different degradation behaviors under exposure to fungi. V C 2017Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46096.

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Synthesis and properties of new crosslinked polyurethane elastomers based on isosorbide

Cited by 52 publications

References 26 publications

Conductive polyurethane elastomer electrolyte (PUEE) materials for anodic bonding

Conductive polyurethane elastomer electrolyte (PUEE) materials for anodic bonding

A new cross‐linked system of silicone rubber based on silicone‐polyurea block copolymer

Biodegradation of pyridine‐based polyether polyurethanes by the Alternaria tenuissima fungus

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