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Due date: Note: (i) This assignment can be submitted by a group of maximum THREE students. (ii) Do not forget to write down your name, ID No. and Section No. on the cover page of your assignment. (iii) Late submission penalty is applied. 1. Many polymers occur in nature. Name any two naturally occurring polymers. 2. What will happen when we begin heating each of the polymers below? a) A thermosetting (polymer). b) A thermoplastic (polymer). 3. Name any two properties that you may look for in describing a polymer. 4. Below is ethylene, the basic monomer of a common polymer. Write its "Electron Dot" Structure. Ethylene Levis Struchue 5. Below is the monomer, "propylene". Show three monomers, united together to form the polymer polypropylene. H H \\, af {/ *s =i H Propylene 6. "Initiators" begin and may end a polymer chain. As the number of initiators increase in a polymerization, the length of a straight chain will (increase/decrease). 7."Cross-linkers" are atoms or groups of atoms that will bind chains of polymers together. Name a property of a polymer that will be altered as a result of altering the number of cross-linkers. 8. What is meant by the elasticity of a polymer. 9. A rubber band is used around a newspaper. What would be the effect of using this rubber band in the snow in the winter