About: Polyester is a research topic. Over the lifetime, 43554 publications have been published within this topic receiving 411101 citations. The topic is also known as: PE & polyesters.
TL;DR: In this article, the authors present a survey of the properties of polymers and their application in the field of chemical engineering, including the following: Coextrusion, Injection Molding, Flexible Packaging, Fibers, Polymer-Clay, and Plasticizers.
TL;DR: In this paper, thermoplastic starch (TPS) and poly(lactic acid) (PLA) were combined with polyethylene glycol and oligomeric lactic acid (OLA) to obtain a significant decrease in glass transition temperature (Tg) shift and mechanical properties improvement.
TL;DR: Recent advances in chemical syntheses of biodegradable polymers from the standpoint of molecular design are reviewed, with emphasis on controlled synthesis, and their biodegradation is discussed in relation to the molecular structure.
TL;DR: A novel highly porous structure, which is a three-dimensional interconnected fibrous network with a fiber diameter ranging from 50 to 500 nm, has been created from biodegradable aliphatic polyesters in this work to mimic natural extracellular matrix architecture.
Abstract: Biodegradable polymers have been widely used as scaffolding materials to regenerate new tissues. To mimic natural extracellular matrix architecture, a novel highly porous structure, which is a three-dimensional interconnected fibrous network with a fiber diameter ranging from 50 to 500 nm, has been created from biodegradable aliphatic polyesters in this work. A porosity as high as 98.5% has been achieved. These nano-fibrous matrices were prepared from the polymer solutions by a procedure involving thermally induced gelation, solvent exchange, and freeze-drying. The effects of polymer concentration, thermal annealing, solvent exchange, and freezing temperature before freeze-drying on the nano-scale structures were studied. In general, at a high gelation temperature, a platelet-like structure was formed. At a low gelation temperature, the nano-fibrous structure was formed. Under the conditions for nano-fibrous matrix formation, the average fiber diameter (160-170 nm) did not change statistically with polymer concentration or gelation temperature. The porosity decreased with polymer concentration. The mechanical properties (Young's modulus and tensile strength) increased with polymer concentration. A surface-to-volume ratio of the nano-fibrous matrices was two to three orders of magnitude higher than those of fibrous nonwoven fabrics fabricated with the textile technology or foams fabricated with a particulate-leaching technique. This synthetic analogue of natural extracellular matrix combined the advantages of synthetic biodegradable polymers and the nano-scale architecture of extracellular matrix, and may provide a better environment for cell attachment and function.
TL;DR: In this article, different results on the fabrication of nanocomposites based on biodegradable polymers for specific field of tissue engineering are presented, and the combination of bioresorbable polymer and nanostructures open new perspectives in the self-assembly of nanomaterials for biomedical applications with tuneable mechanical, thermal and electrical properties.