which among the following is the main unit is Polyester
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Find the fourth vertex of a rectangle whose three vertices taken in order are (4, 1), (7, 4) and (13, -2).Find the value of k if P(4, -2) is the mid-point of the line segment joining the points A(5k, 3) and B(-k, -7).
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Polyester is a category of polymer that contain the ester functional group in their main chain. Examples of polyester polymers are Dacron(terelyene), glyptal etc.
Dacron uses a monomer of terephthalic acid/dimethyl terephthalate and ethylene glycol, whereas glyptal uses monomers of phthalic acid and ethylene glycol.
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