A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds

A high self-healing efficient HTPB-based adhesive containing disulfide bonds, which can improve propellant interface debonding defects at a safe temperature.

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Molecular dynamics simulation insight into the temperature dependence and healing mechanism of an intrinsic self-healing polyurethane elastomer

Physical Chemistry Chemical Physics ◽

10.1039/d0cp03013a ◽

2020 ◽

Vol 22 (31) ◽

pp. 17620-17631

Author(s):

Xianling Chen ◽

Jing Zhu ◽

Yanlong Luo ◽

Jun Chen ◽

Xiaofeng Ma ◽

...

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Hydrogen Bonds ◽

Molecular Diffusion ◽

Healing Process ◽

The Self ◽

Dynamics Simulation ◽

Polyurethane Elastomer ◽

Self Healing ◽

Insight Into

The changes in the type and number of hydrogen bonds as well as the microscopic behavior of molecular diffusion in the self-healing process of polyurethane are revealed.

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A colorless, transparent and self-healing polyurethane elastomer modulated by dynamic disulfide and hydrogen bonds

New Journal of Chemistry ◽

10.1039/c9nj06457e ◽

2020 ◽

Vol 44 (15) ◽

pp. 5746-5754 ◽

Cited By ~ 2

Author(s):

Xue Wang ◽

Huijuan Zhang ◽

Biao Yang ◽

Liguo Wang ◽

Hui Sun

Keyword(s):

Hydrogen Bonding ◽

Hydrogen Bonds ◽

Polyurethane Elastomer ◽

Self Healing ◽

High Transparency

A self-healing PU elastomer modulated by disulfide and hydrogen bonding with high transparency of 97% was reported.

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Dielectric studies of molecular mobility and phase morphology in polymer–layered silicate nanocomposites

Journal of Non-Crystalline Solids ◽

10.1016/s0022-3093(02)01107-9 ◽

2002 ◽

Vol 305 (1-3) ◽

pp. 204-211 ◽

Cited By ~ 65

Author(s):

A. Kanapitsas ◽

P. Pissis ◽

R. Kotsilkova

Keyword(s):

Molecular Mobility ◽

Layered Silicate ◽

Phase Morphology ◽

Dielectric Studies ◽

Silicate Nanocomposites

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Self-Healing Photocurable Epoxy/thiol-ene Systems Using an Aromatic Epoxy Resin

Advances in Materials Science and Engineering ◽

10.1155/2016/8245972 ◽

2016 ◽

Vol 2016 ◽

pp. 1-11 ◽

Cited By ~ 4

Author(s):

Ricardo Acosta Ortiz ◽

Omar Acosta Berlanga ◽

Aída Esmeralda García Valdez ◽

Rafael Aguirre Flores ◽

José Guadalupe Télles Padilla ◽

...

Keyword(s):

Disulfide Bonds ◽

Epoxy Resins ◽

Room Temperature ◽

Gel Permeation Chromatography ◽

Mechanical Analysis ◽

Hypervalent Iodine ◽

Self Healing ◽

Healing Efficiency ◽

Kinetics Of ◽

Epoxy Groups

A rapid and efficient method to obtain self-healing epoxy resins is discussed. This method is based on the use of a thiol-disulfide oligomer obtained by partial oxidation of a multifunctional thiol using a hypervalent iodine (III) compound as oxidant. The oligomer was characterized by Fourier transform infrared spectroscopy (FTIR), Raman and nuclear magnetic resonance spectroscopies, and gel permeation chromatography (GPC). The oligomer was a joint component of the thiol-ene system along with a tetra-allyl-functionalized curing agent. The kinetics of the photopolymerization of diglycidylether of bisphenol A (DGEBA) revealed that conversions of the epoxy groups as high as 80% were achieved in only 15 minutes by increasing the concentration of the thiol-ene system in the formulation. The disulfide bonds introduced in the copolymer using the thiol-disulfide oligomer allowed the repairing of the test specimens in as little as 10 minutes when the specimens were heated at 80°C or for 500 minutes at room temperature. The analysis of the mechanical properties using dynamic mechanical analysis (DMA) showed that the specimens displayed a healing efficiency up to 111% compared with the unhealed specimens, depending on the amount of polythioethers present in the copolymer.

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