Sharif Digital Repository

Polymers are divided into two categories: thermoset and thermoplastic. Thermoset polymers cannot be reprocessed and deformed due to their network structure and permanent and rigid crosslinking connections. Vitrimer materials that have been proposed in recent years; In addition to maintaining their network properties at low temperatures, they have the ability to change shape and reprocess at high temperatures. Therefore, the production of Vitrimer materials can be a suitable solution to reduce the amount of plastic waste produced. These materials consist of a dynamic covalent network in which vitrimerization reactions are performed between different functional groups. The basic polymer used... 

Among the plastics produced around the world, polyolefins are the most used in human daily life and make up about two-thirds of the plastics produced in the world. Also, the most plastic waste is related to polyolefins, which are non-biodegradable plastics. One of the things that have challenged the recycling of polyolefins by traditional methods such as mechanical recycling is the loss of mechanical and rheological properties as well as their degradation. One of the methods of improving properties and postponing degradation is the use of vitrimerization reactions, as a result of which, in thermoplastics, a compatible covalent network is created, which gives the plastic the ability to behave...