This article discusses the development of long-chain aliphatic polyesters that mimic polyethylene in properties and can be recycled and biodegraded. These materials, such as polyester-18.18, are synthesized from long-chain dicarboxylic acids and short-chain diols, and have properties similar to high-density polyethylene (HDPE). They can be processed using conventional methods like injection molding, extrusion, and 3D printing. The materials can be chemically recycled via solvolysis, allowing for the recovery of high-quality monomers that can be used to produce new polyester materials with properties comparable to the original. The biodegradability of these materials varies depending on the monomers used, with some fully mineralizing under industrial composting conditions. The study also highlights the potential of these materials for circular economy applications, as they can be recycled and biodegraded, reducing environmental impact. The research emphasizes the importance of developing sustainable and recyclable plastics that can replace conventional petroleum-based materials. The study also explores the mechanical properties, crystallinity, and thermal behavior of these materials, as well as their potential for use in various applications such as packaging and textiles. The findings suggest that these long-chain polyesters could be a promising solution for sustainable, recyclable plastics that are nonpersistent in the environment.This article discusses the development of long-chain aliphatic polyesters that mimic polyethylene in properties and can be recycled and biodegraded. These materials, such as polyester-18.18, are synthesized from long-chain dicarboxylic acids and short-chain diols, and have properties similar to high-density polyethylene (HDPE). They can be processed using conventional methods like injection molding, extrusion, and 3D printing. The materials can be chemically recycled via solvolysis, allowing for the recovery of high-quality monomers that can be used to produce new polyester materials with properties comparable to the original. The biodegradability of these materials varies depending on the monomers used, with some fully mineralizing under industrial composting conditions. The study also highlights the potential of these materials for circular economy applications, as they can be recycled and biodegraded, reducing environmental impact. The research emphasizes the importance of developing sustainable and recyclable plastics that can replace conventional petroleum-based materials. The study also explores the mechanical properties, crystallinity, and thermal behavior of these materials, as well as their potential for use in various applications such as packaging and textiles. The findings suggest that these long-chain polyesters could be a promising solution for sustainable, recyclable plastics that are nonpersistent in the environment.