From Business: Bob Rohrman Auto Group owns and operates 26 dealerships in Indiana.The company offers new and used vehicles, service and financing. The brands sold include Lexus,â¦ Add to mybook Remove from mybook
Thermosetting polymers. Polymer with cross-links. Thermosetting polymers have different properties to thermosoftening polymers. Once moulded, they do not soften when heated and they cannot be reshaped. Vulcanised rubber is a thermoset thermoset: Material that becomes permanently hard after heating. used to make tyres.Its polymer chains are joined together by cross-links, so they cannot slide past each other easily. Page: 1  1. 2  2. 3  3. 4  4.ulcanised rubber is a thermoset thermoset: Material that becomes permanently hard after heating. used to make tyres. Its polymer chains are joined together by cross-links, so they cannot slide past each other easily. Page: 1  1. 2  2. 3  3. 4  4.
Polymers are very large molecules (sometimes called macromolecules). Each polymer molecule is a long chain of (mainly carbon) atoms.Polymers are made from many smaller molecules, called monomers. These monomers (the starting materials) are often alkenes.The process (chemical reaction) that turns monomers into polymers is called polymerisation. The conditions used for polymerisation are heat, pressure and a catalyst.olymers produce a very wide range of materials with many uses. New materials are often used to replace older ones because the new material has superior properties. The properties of the material depend on what the polymer is made from and its structure. The general public know polymers as plastics.