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The authors acknowledge the financial support received from the Agencia Estatal de Investigacion (PID2019-106703RB-I00 and TED2021-131102B-C21) and from Rey Juan Carlos University (C1PREDOC2020).

Analysis of institutional authors

Lorero, ICorresponding AuthorCampo, MCorresponding AuthorProlongo, S GCorresponding Author

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Article

Recycling development and shaping of a thermo-reversible epoxy resin with partial contents of Diels-Alder bonds

Publicated to:Polymer Testing. 134 108433- - 2024-05-01 134(), DOI: 10.1016/j.polymertesting.2024.108433

Authors: Lorero, I; Rico, B; Campo, M; Prolongo, S G

Affiliations

Rey Juan Carlos Univ, Inst Tecnol Sostenibil, C-Tulipan S-N, Mostoles 28933, Madrid, Spain - Author
Rey Juan Carlos Univ, Mat Sci & Engn Area, C-Tulipan S-N, Madrid 28933, Spain - Author

Abstract

Thermo-mechanical recycling and reshaping of dynamic covalent networks is a promising field under development that could help to increase thermoset sustainability. Herein, the reprocessing of a partially reversible epoxy resin with a 0.6 Diels-Alder crosslink ratio, which has a relatively high Tg and a simplified manufacturing route, is studied to determine the optimal conditions for its thermomechanical recycling through milling and hotpressing, and reshaping. Thus, in this work, we have studied the influence of compaction time, pressure, and temperature on recycled bulk properties. Meanwhile, different heating temperatures and times are also tested to evaluate the cured resin shaping to fix a new geometry and to observe its shape-recovering capability. Their characterization reveals that the recycling method generates dense thermosetting polymers with similar crosslinking structure and behavior, comparable to the virgin resin, inducing light post-curing that increases their glass transition temperature (Tg). The most efficient thermo-mechanical recycling conditions consist of the application of isothermal compaction at 130 degrees C and 150 bar for 30 min, which leads to resin bulks with comparable properties to the neat resin even after 3 cycles of milling and hot-pressing. On the other hand, the synthesized resin has shown excellent shaping due to the structural relaxation induced by the initiation of retro Diels-Alder reaction, adopting new geometries easily when the samples are heated above their Tg (91 degrees C) and preserving them after cooling to ambient temperature. Moreover, the samples also show high shape-recovering after heating again up to Tg. This reshaping and recovery have been maintained for several cycles without observing an irreversible lack of shape fixing or shape recovery.

Keywords

CanCross-linkerDiels-alderHigh-performancePolymerReprocessable thermosetReversible epoxyShape memorShape memoryVitrimer

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Polymer Testing due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2024 there are still no calculated indicators, but in 2023, it was in position 14/95, thus managing to position itself as a Q1 (Primer Cuartil), in the category Polymer Science.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-21:

  • WoS: 2
  • Scopus: 3

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-21:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 9 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.

Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (Lorero Gómez, Isaac) and Last Author (González Prolongo, Silvia).

the authors responsible for correspondence tasks have been Lorero Gómez, Isaac, Campo Gómez, Mónica and González Prolongo, Silvia.