Results 31 to 40 of about 1,864 (182)

Synergistic Integration of Liquid Crystalline Ordering and Dynamic Networks for Ultrarobust Bismaleimide Vitrimers

Advanced Functional Materials, EarlyView.
A liquid‐crystalline bismaleimide vitrimer integrates local mesogenic organization with exchange‐active ester connectivity, achieving a glass‐transition temperature near 300°C while remaining reprocessable. Stress‐relaxation analysis and temperature‐dependent remolding reveal how segmental mobility, network rearrangement, and structural integrity ...
Woohyeon Kwon, Van‐Kien Hoang, Kyosun Ku, Hyeonuk Yeo   +3 more
wiley   +1 more source

Acetoacetates Derived From Vegetable Oils: A Platform for Tailor‐Made Vinylogous Urethane Foams

Advanced Functional Materials, EarlyView.
A renewable vegetable oil is converted into acetoacetate‐functionalized precursors for the preparation of catalyst‐free vinylogous urethane foams. Room‐temperature foaming with n‐pentane generates lightweight cellular materials, while the choice of amine enables control over foam structure and mechanical properties.
Krzysztof Polaczek, Priscilla de Souza Lima, Olga Gotkiewicz, Ondrej Kopilec, Radka Hobzova, Lívia Kanizsová, Mikelis Kirpluks, Ondrej Sedlacek, Hynek Beneš   +8 more
wiley   +1 more source

Strong self-healing close-loop recyclable vitrimers via complementary dynamic covalent/non-covalent bonding [PDF]

Epoxy vitrimers represent a new class of high-performance sustainable resins because of their desired mechanical and thermally malleable properties. Unfortunately, existing epoxy vitrimers cannot self-heal at room temperature (R.T.) due to the trade-off ...
Zhang, Qi, Cao, Cheng-Fei, Ye, Guofeng, Wang, Cheng, Lynch, Mark, Song, Pingan, Liu, Zhitian, Huo, Siqi, Wang, Hao   +8 more
core   +1 more source

Synthesis and investigation of vitrimers from renewable resources / [PDF]

, 2023
Vitrimers are a class of polymers between thermosets and thermoplastics and therefore change their topology through a dynamic bond exchange that results in their self-healing and reprocessability [1].
Kastanauskas, Marius,, Grauželienė, Sigita,, Ostrauskaitė, Jolita,   +2 more
core   +1 more source

Green by design, smart by chemistry: Recent advances in bio-based vitrimers for next-generation sustainable materials

Materials Today Sustainability
Vitrimers represent a transformative class of polymeric materials that combine the robust mechanical properties of thermosets with the reprocessability of thermoplastics. Among them, bio-based vitrimers have garnered increasing attention as a sustainable
Ankit Sharma, Sandeep Singh Bisht, Muskan Kumari, Manju Yadav, Harsh Saini, Shipra Jaswal, Inderdeep Singh, Bharti Gaur   +7 more
doaj   +1 more source

A 4D Printable Shape Memory Vitrimer with Repairability and Recyclability through Network Architecture Tailoring from Commercial Poly(ε‐caprolactone)

Advanced Science, 2021
Vitrimers have shown advantages over conventional thermosets via capabilities of dynamic network rearrangement to endow repairability as well as recyclability.
Jungho Joe, Jeehae Shin, Yong‐Seok Choi, Jae Hyuk Hwang, Sang Hwa Kim, Jiseok Han, Bumsoo Park, Woohwa Lee, Sungmin Park, Yong Seok Kim, Dong‐Gyun Kim   +10 more
doaj   +1 more source

Graded Metallopolymer Structures with Shape‐Memory Abilities via DLP‐Based 3D‐Printing

Advanced Functional Materials, EarlyView.
This study presents the digital light processing (DLP) based 3D printing of graded metallopolymers featuring shape‐memory abilities. The permanent shape can be recovered in two distinct steps with excellent rates. The obtained graded prints range from simple rod‐like structures to complex hollow materials.
Michael Klein, Michael F. Agyemang, Michael Schmitt, Jürgen Popp, Martin D. Hager, Stefan Zechel, Ulrich S. Schubert   +6 more
wiley   +1 more source

Block Copolymer Vitrimers

, 2019
In this report, we merge block copolymers with vitrimers in an effort to realize the prospect of higher-order, nanoscale control over associative cross-link exchange and flow.
Kayla A. Lantz, Kayla A. Lantz (8139288), Brent S. Sumerlin (1483285), Georg M. Scheutz, Thomas H. Epps (1343403), Seung Hyun Sung (8118383), Jacob J. Lessard (6382445), Jacob J. Lessard, Georg M. Scheutz (3738667), Seung Hyun Sung, Thomas H. Epps, Brent S. Sumerlin   +11 more
core   +1 more source

Reprocessable and Repairable Bio‐Based Vitrimers From Acrylated Epoxidized Rapeseed Oil for Additive Manufacturing

Macromolecular Materials and Engineering
Thermosets are difficult to reprocess and often rely on petroleum‐derived feedstocks, creating environmental and end‐of‐life challenges. This study addresses both issues by developing reprocessable bio‐based vitrimers tailored for additive manufacturing.
Sabine Greivule, Inga Besprozvannaja, Matilde Porcarello, Sergejs Gaidukovs   +3 more
doaj   +1 more source

Chemical Strategies for Multistimuli Responsive Dynamic Covalent Materials in Regenerative Medicine

Advanced Healthcare Materials, EarlyView.
Multistimuli responsive dynamic covalent materials integrate reversible chemistry with the complex chemical, mechanical, and biochemical cues of regenerative environments. This review highlights chemical strategies based on orthogonal dynamic bonds, multicomponent networks, and hierarchical architectures to regulate mechanics, degradation, and ...
Saurabh Joshi, Matthew B. Baker, Dominik Schauenburg   +2 more
wiley   +1 more source