What is Polyester and How is it Made?

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Polyester is classified as a synthetic polymer or plastic because it is derived from petrochemical sources and involves a polymerization process that creates long chains of repeating units. The primary monomer used to produce polyester is ethylene glycol, which has the structural formula HO-CH2-CH2-OH, and terephthalic acid, with the structural formula HOOC-C6H4-COOH. Polyester is considered a thermoplastic because it can be melted and reshaped upon heating without undergoing any chemical change, allowing for recycling and remolding. Common fillers and additives used in polyester include glass fibers, which enhance strength and durability, and plasticizers, which improve flexibility and workability. The structural formula of polyester features repeating units formed from the reaction of ethylene glycol and terephthalic acid, creating an ester linkage.
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1. why polyester is called a synthetic polymer/plastic?
2. identify the monomer used to produce polyester.(name and structural formula).
3. why polyseter is a thermoplstic?
4. identify any fillers/additives added to polyester and explain your answer.
5. draw the structural formula of polyester and include one repeating unit of polyester.
 
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