A comprehensive review of global production and recycling methods of polyolefin (PO) based products and their post-recycling applications

Electrochemical methods for materials recycling

“…123 Such methods produce polymers of slightly lower quality, but with many of the original properties of the starting material, and these recycled polymers have seen applications in wood-plastic composites (WPCs) and polymer blends. 123 Another interesting example of polypropylene recycling to obtain a non-fuel product involves the upcycling of waste PP into graphene, by Gong et al 124 A challenge previously limiting synthesis of graphene from waste materials is that waste plastics typically degrade into multiple products, including aromatics, light hydrocarbons, and long-chain olefins. Selective transformation of waste plastic is needed to obtain only the aromatic and hydrocarbon products, as those are the products that can yield graphene.…”

Degradation Behavior of Polypropylene during Reprocessing and Its Biocomposites: Thermal and Oxidative Degradation Kinetics

“…This means that when wood fiber was incorporated into the PP matrix, the thermal degradation of each component was slightly delayed. Wood fiber particles are impregnated and covered by the thermoplastic phase, and the considerably higher decomposition temperature of PP, accompanied by the inherently low thermal conductivity of polymers, can delay the degradation of the wood components [24,44]. The slight increase in the T peak of PP can probably be explained by two mechanisms: the heat sink effect of the residual ash [45] and the thermal insulating effect of the foam-like structure of PP [46].…”

“…This means that a separation of the degradation processes of wood and PP could not be achieved simply via the original degradation curves under air. the wood components [24,44]. The slight increase in the Tpeak of PP can probably be explained by two mechanisms: the heat sink effect of the residual ash [45] and the thermal insulating effect of the foamlike structure of PP [46].…”

Crystallization of Random Metallocene-Catalyzed Propylene-Based Copolymers with Ethylene and 1-Hexene on Rapid Cooling

“…In the large family of copolymers of isotactic polypropylene (iPP), which have been essential for the global success of this polymer with a global production volume of more than 60 million tons per year [ 1 ], random copolymers have a special position. In contrast to heterophasic copolymers [ 2 ], which are often based on an iPP homopolymer matrix and elastomeric inclusions, random copolymers derive their properties from single-component structures.…”