Jobs in aeronautics also pay less than other engineering jobs, which may be why nearly half of engineers who major in aeronautics work in another industry, according to data from the American Institute of Aeronautics and Astronautics. Two other factors will influence the number of aeronautics job opportunities.
The basic binding materials in plastic are resins, which undergoes polymerization and condensation reactions during the preparation of plastic. There are two types of plastics, thermoplastics and thermoset plastics. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride (PVC), polytyrene (PS), nylons, and polytetrofluoro ethylene (PTFE or Teflon). Examples of thermoset plastics include phenolic resins, amino resins, polyester resins, silicon resins, epoxy resins, and polyurethanes. This handbook discusses the types, properties, uses, and advantages of thermoset plastics.
Though thermoset plastics and thermoplastics sound similar, they have very different properties and applications. Understanding the performance differences can help you make better sourcing decisions and improve your product designs. The primary physical difference is that thermoplastics can be remelted back into a liquid, whereas thermoset plastics always remain in a permanent solid state. Think of thermoplastics as butter â butter can be melted and cooled multiple times to form various shapes.