Readily recyclable, high-performance thermosetting materials based on a lignin-derived spiro diacetal trigger

Abstract

A spiro diacetal structure based on renewable resources was utilized to synthesize thermosets combining ready recyclability and high performance.

Fully Biobased Vitrimers from Glycyrrhizic Acid and Soybean Oil for Self-Healing, Shape Memory, Weldable, and Recyclable Materials

“…For example, Zhang and co-workers prepared a series of vitrimer materials from eugenol, 23 lignin, 24 vanillin, 25 and guaiacol, 25 which were weldable, reprocessable and self-healable. The group of Zhu found that the Schiff base covalent vitrimers prepared from vanillin exhibited the high performance beyond the ones from commercial bisphenol A epoxy resin, [26][27][28] and could be facilely recycled from carbon fiber reinforced composites. 27,28 However, in these reported works tedious chemical modifications on biological resources were necessary to offer reactive sites for curing.…”

Novel Unsaturated Polyester Nanocomposites via Hybrid 3D POSS-Modified Graphene Oxide Reinforcement: Electro-Technical Application Perspective

“…The sample analysis was executed according to the ASTM D2863/77 standards. The vertical burning tests were conducted in the flame meter, with the dimensions of the sample size being (10 ± 0.002) × (10 ± 0.002) × (0.3 ± 0.002) cm 3 . Each sample was buckled vertically in the center of the column and burned for a period of 3 min.…”

“…The current revolution in polymer technologies reflects the role of thermosetting plastics in their advancement. The dexterous properties of the thermosetting plastics have empowered researchers to widen their possible application in a vast range of fields [1][2][3][4]. The enticing properties such as low viscosity (uncured state), customized modulus (according to application), high thermal stability, smooth process ability and their ability to use with fillers has provided impetus in expanding their commercial applications [5].…”

Stimuli‐responsive mechanical properties in polymer glasses: challenges and opportunities for defense applications

“…These polyacetal vitrimers require no catalyst, show facile monomer recovery and maintain high-T g systems. [231][232][233] Zhu et al were the first to report this acetal motif in a vitrimer network where both transacetalization and acetal metathesis 234 exchange reactions occur to form a permanent dynamic network. This reversible 'click' reaction has potential to easily incorporate many commercial polyols into dynamic networks without the use of catalysts.…”