Results 1 to 10 of about 692 (117)

Recycling Thermoset Systems by Vitrimerization Using Solid‐State Shear Extrusion‐ A Feasibility Study [PDF]

Global Challenges
Thermoset polymers with permanently cross‐linked networks have outstanding mechanical properties but cannot be reprocessed or recycled. Vitrimerization is a simple and practical method to convert permanent crosslinked thermosets into vitrimers with ...
Amin Jamei‐Oskouei, Majid Mehrabi‐Mazidi, Ica Manas‐Zloczower   +2 more
doaj   +2 more sources

Eugenol-Based Epoxy Vitrimers: Caffeine and Zinc Acetate as Potential Alternative Catalysts in Curing Kinetics and Dynamic Network Properties [PDF]

Molecules
The development of sustainable vitrimers from bio-based sources addresses the need for high-performance recyclable materials. This research describes eugenol-derived epoxy vitrimers cross-linked with adipic acid as a curing agent, focusing on comparative
Angela Y. Becerra-Lovera, Javier Mauricio Anaya-Mancipe, Rubén D. Díaz-Martin, Marcos Lopes Dias, Diego de Holanda Saboya Souza   +4 more
doaj   +2 more sources

Current State-of-the-Art and Perspectives in the Design and Application of Vitrimeric Systems [PDF]

Molecules
To fulfill the current circular economy concept, the academic and industrial communities are devoting significant efforts to plastic materials’ end-of-life.
Diego Pugliese, Giulio Malucelli
doaj   +2 more sources

Self-Healing and Thermomechanical Properties of Activated Carbon Pyrochar Derived from Municipal Mixed Plastic Waste Pyrolysis with Self-Healing Epoxy Vitrimer Composites [PDF]

Nature Environment and Pollution Technology, 2023
An ecological vitrimer is being developed using activated carbon pyrochar from municipal mixed plastic waste pyrolysis into an epoxy composite. Durable vitrimeric materials may be created by adding pyrochar to polymeric composites. Due to their ductility,
Krishna Moorthy Rajendran, Bhawna Yadav Lamba and Deepak Kumar
doaj   +1 more source

Insight into the structure-property relationships of intramolecularly-catalyzed epoxy vitrimers

Materials & Design, 2022
Vitrimers are emerging dynamic polymers with exchangeable associated networks that can potentially be used as substitutes for conventional thermosetting polymers, whose healing and recycling are difficult.
Huanbo Wang, Shiyu Guo, Xuefeng Zhang, Yue Liu, Tian Liu, Haipeng Yu   +5 more
doaj   +1 more source

Influence of the Epoxy/Acid Stoichiometry on the Cure Behavior and Mechanical Properties of Epoxy Vitrimers

Molecules, 2022
Bisphenol A epoxy resin cured with a mixture of dimerized and trimerized fatty acids is the first epoxy vitrimer and has been extensively studied. However, the cure behavior and thermal and mechanical properties of this epoxy vitrimer depend on the epoxy/
Fan Jing, Ruikang Zhao, Chenxuan Li, Zhonghua Xi, Qingjun Wang, Hongfeng Xie   +5 more
doaj   +1 more source

Room temperature-curable, easily degradable, and highly malleable and recyclable vanillin-based vitrimers with catalyst-free bond exchange

Polymer Testing, 2022
Development of bio-based vitrimers attracted significant attention due to these species’ excellent recyclability and renewability. However, most bio-based vitrimers require high-temperature curation and catalyst use.
Min Liu, Fei Gao, Xinru Guo, Qianqian Liang, Jinlong He, Jiang Zhong, Cong Lin, Faman Lin, Liang Shen   +8 more
doaj   +1 more source

Recycling strategies for vitrimers

International Journal of Smart and Nano Materials, 2022
Vitrimer is a new type of material that combine the advantages of thermoplastic and thermoset materials. The rapid dynamic exchange reactions at high temperature allow the topology of cross-linked networks to change and rearrange while keeping material ...
Haochuan Zhang, Jingjing Cui, Guang Hu, Biao Zhang   +3 more
doaj   +1 more source

Crystallinity and perfection in ethylene vitrimers probed by combined calorimetry, scattering, and time-domain NMR

Frontiers in Soft Matter, 2023
The kinetics of crystallization and crystal-crystal transformations in ethylene vitrimers are studied by time-domain NMR. These vitrimers previously exhibited polymorphic transition of crystal structures, which are shown here to be distinguishable by NMR
Kay Saalwächter, Bhaskar Soman, Bhaskar Soman, Christopher M. Evans, Christopher M. Evans   +4 more
doaj   +1 more source

Synthesis of novel vanillin-amine hardeners fully derived from renewable bio feedstocks and their curing with epoxy resins to produce recyclable reprocessable vitrimers

Heliyon, 2023
Biobased epoxy vitrimers have reached intense interest in recent decades. The triggerable reverse bonds can be introduced into these crosslinked epoxy vitrimers through epoxy resins or hardeners.
Muhammad Abdur Rashid, Md Nabiul Hasan, Md Abdullahil Kafi   +2 more
doaj   +1 more source