Design of Isocyanate-Free Biobased Polyurea Vitrimers with Dynamic Hydrogen and Imine Bonds, Offering Ambient Self-Healing, Reprocessing, and Recycling Properties DOI
Ding Bao, Nadège Follain, Nasreddine Kébir

и другие.

Macromolecules, Год журнала: 2024, Номер unknown

Опубликована: Дек. 25, 2024

A series of vitrimers combining dynamic hydrogen and imine bonds was prepared by a reaction between amine-terminated nonisocyanate polyurea oligomers (NIPUrea), terephthalaldehyde, tris(2-aminoethyl)amine at various equivalent ratios. NIPUrea different molecular weights were using an environmentally friendly sustainable approach, implying transurethane polycondensation technology. The possessed cross-linking densities exhibited Tg values around 20 °C, as well thermal stabilities exceeding 300 °C. They displayed high tunable mechanical strength ductility, with Young's modulus from 1.7 to 26.4 MPa, breaking stress 7.9 12.9 MPa elongation break 147 517%. revealed good solvent resistance except in acidic THF/water solutions, which they underwent irreversible degradation solubilization. Most the materials excellent self-healing efficiency room temperature (93 107%) reprocessability recyclability after hot pressing.

Язык: Английский

Development of tough and stiff elastomers by leveraging hydrophilic–hydrophobic supramolecular segment interaction DOI

Jihua Yang,

Wei Zhang, Rui Pan

и другие.

Soft Matter, Год журнала: 2024, Номер unknown

Опубликована: Дек. 6, 2024

This manuscript reports an approach to prepare tough and stiff elastomers by leveraging hydrophilic–hydrophobic supramolecular segment interaction.

Язык: Английский

Процитировано

0
Design of Isocyanate-Free Biobased Polyurea Vitrimers with Dynamic Hydrogen and Imine Bonds, Offering Ambient Self-Healing, Reprocessing, and Recycling Properties DOI
Ding Bao, Nadège Follain, Nasreddine Kébir

и другие.

Macromolecules, Год журнала: 2024, Номер unknown

Опубликована: Дек. 25, 2024

A series of vitrimers combining dynamic hydrogen and imine bonds was prepared by a reaction between amine-terminated nonisocyanate polyurea oligomers (NIPUrea), terephthalaldehyde, tris(2-aminoethyl)amine at various equivalent ratios. NIPUrea different molecular weights were using an environmentally friendly sustainable approach, implying transurethane polycondensation technology. The possessed cross-linking densities exhibited Tg values around 20 °C, as well thermal stabilities exceeding 300 °C. They displayed high tunable mechanical strength ductility, with Young's modulus from 1.7 to 26.4 MPa, breaking stress 7.9 12.9 MPa elongation break 147 517%. revealed good solvent resistance except in acidic THF/water solutions, which they underwent irreversible degradation solubilization. Most the materials excellent self-healing efficiency room temperature (93 107%) reprocessability recyclability after hot pressing.

Язык: Английский

Процитировано

0