Characterisation of the thermal self-healing of a high crosslink density epoxy thermoset

Bai, Nan; Simon, George P.; Saito, Kei

doi:10.1039/c5nj00066a

Cited by 32 publications

(21 citation statements)

References 21 publications

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“…In general, the samples prepared from sunflower oil showed slightly higher transition temperatures than those derived from jatropha oil. The higher cross-link density of the sunflower-based polymer might require a higher temperature for the DA and rDA reactions to occur [61].…”

Section: Synthesis and Characterization Of Thermally Reversible Networkmentioning

confidence: 99%

Thermally Reversible Polymeric Networks from Vegetable Oils

et al. 2020

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Low cross-link density thermally reversible networks were successfully synthesized from jatropha and sunflower oils. The oils were epoxidized and subsequently reacted with furfurylamine to attach furan groups onto the triglycerides, preferably at the epoxide sites rather than at the ester ones. Under the same reaction conditions, the modified jatropha oil retained the triglyceride structure more efficiently than its sunflower-based counterpart, i.e., the ester aminolysis reaction was less relevant for the jatropha oil. These furan-modified oils were then reacted with mixtures of aliphatic and aromatic bismaleimides, viz. 1,12-bismaleimido dodecane and 1,1′-(methylenedi-4,1-phenylene)bismaleimide, resulting in a series of polymers with Tg ranging between 3.6 and 19.8 °C. Changes in the chemical structure and mechanical properties during recurrent thermal cycles suggested that the Diels–Alder and retro-Diels–Alder reactions occurred. However, the reversibility was reduced over the thermal cycles due to several possible causes. There are indications that the maleimide groups were homopolymerized and the Diels–Alder adducts were aromatized, leading to irreversibly cross-linked polymers. Two of the polymers were successfully applied as adhesives without modifications. This result demonstrates one of the potential applications of these polymers.

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Section: Synthesis and Characterization Of Thermally Reversible Networkmentioning

confidence: 99%

Thermally Reversible Polymeric Networks from Vegetable Oils

et al. 2020

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“…Recent methodologies for self‐healing polymers use covalent dynamic reactions which require external stimuli such as heat or light to heal damages. Different chemistries have been established to enable self‐healing for polymers such as Diels‐Alder reactions,, or imine,, alkoxyamine and disulphide exchange procedures ,…”

Section: Figurementioning

confidence: 99%

Light‐Switchable Self‐Healing Dynamic Linear Polymers: Reversible Cycloaddition Reactions of Thymine‐Containing Units

Abdallh

Hearn

et al. 2019

ChemPlusChem

Self Cite

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A dynamic linear polymer was formed by the [2π + 2π] reversible cycloaddition reaction of a thymine-based monomer under topochemical conditions and was used in self-healing applications. The reversible polymerisation of the thymine monomer was confirmed by UV and GPC analysis. Irradiation at 302 nm resulted in polymerisation of the monomer, and irradiation with wavelengths lower than 240 nm resulted in depolymerisation and the production of oligomeric units. This leads to a reduction in the glass transition temperature, and promoted healing of surface scratches due to the increased chain mobility. The self-healing ability of scratched samples was assessed based on the visual disappearance of the damage. In addition, the mechanical properties of the polymer before and after healing were found to be similar. [a] Dr. M. Abdallh, Mr. P. He, Prof. M. T.

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“…Several studies were devoted to the comparison of optical, thermic, and mechanical properties of epoxy polymers. Some of them reported the use of the same hardener and different epoxy resins, while other ones have used the same epoxy resin and investigated several hardeners [16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Exploring the optical and dielectric properties of bifunctional and trifunctional epoxy polymers

Jdidi

Fourati

Zerrouki

et al. 2021

Polymer

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Characterisation of the thermal self-healing of a high crosslink density epoxy thermoset

Abstract: Different properties of a new self-healing TGAP-based epoxy polymer were studied and the influence of the crosslink density is demonstrated.

Cited by 32 publications

References 21 publications

Thermally Reversible Polymeric Networks from Vegetable Oils

Thermally Reversible Polymeric Networks from Vegetable Oils

Light‐Switchable Self‐Healing Dynamic Linear Polymers: Reversible Cycloaddition Reactions of Thymine‐Containing Units

Exploring the optical and dielectric properties of bifunctional and trifunctional epoxy polymers

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