Self-repairing mechanism of plastics

Takeda, Kunihiko; Tanahashi, Mitsuru; Unno, Haruo

doi:10.1016/j.stam.2003.10.004

Cited by 39 publications

(21 citation statements)

References 23 publications

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“…One is the chemical structure of the chain end and the other is the catalyst (Na 2 CO 3 ) for acceleration of the reaction. Another example is poly(phenylene ether) (PPE) in which the repairing agent was regenerated by oxygen [26]. The polymer chain of the PPE was cut by a deterioration factor (such as heat, light, and external mechanical force) to produce a radical on the end of the scission chain.…”

Section: Self-healing Based On Chemical Interactionsmentioning

confidence: 99%

Self healing in polymers and polymer composites. Concepts, realization and outlook: A review

Yuan¹,

Yin²,

Rong³

et al. 2008

Express Polym. Lett.

375

192

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Abstract. Formation of microcracks is a critical problem in polymers and polymer composites during their service in structural applications. Development and coalescence of microcracks would bring about catastrophic failure of the materials and then reduce their lifetimes. Therefore, early sensing, diagnosis and repair of microcracks become necessary for removing the latent perils. In this context, the materials possessing self-healing function are ideal for long-term operation. Self-repairing polymers and polymer composites have attracted increasing research interests. Attempts have been made to develop solutions in this field. The present article reviews state-of-art of the achievements on the topic. According to the ways of healing, the smart materials are classified into two categories: (i) intrinsic self-healing ones that are able to heal cracks by the polymers themselves, and (ii) extrinsic in which healing agent has to be pre-embedded. The advances in this field show that selection and optimization of proper repair mechanisms are prerequisites for high healing efficiency. It is a challenging job to either invent new polymers with inherent crack repair capability or integrate existing materials with novel healing system.

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Section: Self-healing Based On Chemical Interactionsmentioning

confidence: 99%

Self healing in polymers and polymer composites. Concepts, realization and outlook: A review

Yuan¹,

Yin²,

Rong³

et al. 2008

Express Polym. Lett.

375

192

View full text Add to dashboard Cite

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“…(1) The research work on man-made materials with metabolism, which is introduced in this journal [48], is focusing on the self-repairing reaction, the metabolic reaction and the activities based on the information of DNA in a living body. Generally speaking, man-made materials are deteriorated irreversibly.…”

Section: Metabolic/information Structure Formation Processesmentioning

confidence: 99%

“…The passive protection system in polymers is illustrated in Fig. 11a [48]. In this system, the cause of the deterioration is due to the direct attacks on the additives in place of the polymer.…”

Section: Metabolic/information Structure Formation Processesmentioning

confidence: 99%

Advances in nature-guided materials processing

Asai

Koumoto

Matsushita

et al. 2003

Science and Technology of Advanced Materials

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The center of excellence (COE) titled 'The Creation of Nature-Guided Materials Processing' has been established in Nagoya University as the 21st Century COE Program supported by Ministry of Education, Culture, Sports, Science and Technology. In the Nature COE, various activities on the education and research are being performed through learning the laws of nature, namely, methods of attaining 'appearance of the maximum function under the minimum substance and energy consumption', which the nature and living organisms have acquired through their evolution in long period. Together with such educational programs for PhD students as research incentive, oversea training, and external evaluation programs, an 'Open-Cluster Program' was originated for promoting researches proposed by research groups consisting of young researchers in and out of the university and also for fostering them.The researches are being advanced on materials used for living bodies, mimicking structures which nature or living bodies are forming, and producing materials by mimicking processes to form the structures observed in the nature or the living bodies. In this COE, these researches are conducted by four groups to extend the processes observed in the natural world to a new type of processing, that is, thoroughly examined and rationalized by plunging a scalpel of engineering and to establish a new academic field of materials science and engineering. q

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“…Dry also proposed the idea employing the hollow fibers containing repairchemicals [6,2], leading to the development of a self-repairing epoxy-composite by Pang and Bond [7]. The metabolic reaction method was proposed by Takeda et al employing polyphenylene-ether containing cupper complex [8]. They demonstrated that the deteriorated polymers by heat, light, and mechanical force, which have radicals at the chain end, are stabilized by a pre-mixed hydrogen donor, such as dibutylamine.…”

Section: Introductionmentioning

confidence: 99%