what is the difference between thermoplastic and thermosetting plastic pls don't spam
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Answer:
Explanation:
Thermoplastic is a class of polymer, which can be easily melted or softened by providing heat in order to recycle the material. Therefore, these polymers are generally produced in one step and then converted into the required article at a subsequent process. Furthermore, thermoplastics have covalent interactions between monomer molecules and secondary weak van der Waal interactions between polymer chains. This weak bonds can be broken by heat, and change its molecular structure. The Figure 1. and 2. illustrate the changes that occur in intermolecular interactions of thermoplastic in the presence of heat. The softened thermoplastic can be placed in a mould, and then cooled to give the desired shape. When it cools significantly below its glass transition temperature (Tg), weak Van der Waal bonds in between monomer chains will form reversibly to make the material rigid and usable as a formed article. Therefore, this type of polymers can be readily recycled or remoulded, because each time it is reheated, it can be reshaped into a new article. Acrylic, Acrylonitrile Butadiene Styrene, Nylon, Polybenzimidazole, Polycarbonate, Polypropylene, Polystyrene, Teflon, Polyvinyl Chloride, etc. are several examples of thermoplastic materials. Among these thermoplastics, some materials such as Polybenzimidazole, Teflon, etc. have exceptional thermal stability because of their high melting points.
Unlike thermoplastics, thermosetting plastics have superior properties like high thermal stability, high rigidity, high dimensional stability, resistant to creep or deformation under load, high electrical and thermal insulating properties, etc. This is simply because thermosetting plastics are highly cross-linked polymers that have a three-dimensional network of covalently bonded atoms. The strong cross-linked structure shows resistance to higher temperatures which provides greater thermal stability than thermoplastics. Therefore, these materials cannot be recycled, remoulded, or reformed upon heating. The Figure 3. and 4. illustrate the changes that occur in intermolecular interactions of thermosetting polymers under high temperatures. Thermosetting plastic will become softer with the presence of heat, but it will not be able to shape or form to any greater extent, and will definitely not flow. Typical examples of thermosetting plastics are,
Phenolic resins that occur as a reaction between phenols with aldehydes. These plastics are generally used for electrical fittings, radio and television cabinets, buckles, handles, etc. Phenolic are dark in color. Therefore, it is difficult to obtain a wide range of colors.
Explanation:
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