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Polymer: Quiz

  
  
  
  

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Question 1: What does the following picture show?

  A plastic item with thirty years of exposure to heat and cold, brake fluid, and sunlight. Notice the discoloration, swollen dimensions, and tiny splits running through the material
  Phase diagram of the typical mixing behavior of weakly interacting polymer solutions.
  Dendrimer and dendron
  Ozone-induced cracking in natural rubber tubing

Question 2: Before then, scientists believed that polymers were clusters of small molecules (called ________), without definite molecular weights, held together by an unknown force, a concept known as association theory.
LiquidPlasma (physics)ColloidSolid

Question 3: Synthetic polymerization reactions may be carried out with or without a ________.
CatalysisAlkeneHydrogenOxygen

Question 4: Ethylene-vinyl acetate, on the other hand, contains more than one variety of repeat unit and is thus a ________.
Glass transitionPoly(methyl methacrylate)PolystyreneCopolymer

Question 5: Traces of ________ in the water supply attacked vulnerable polymers in the plastic plumbing, a problem which occurs faster if any of the parts have been poorly extruded or injection molded.
NitrogenChlorineHydrogenOxygen

Question 6: Hydroxyl ions are generated at the graphite ________ attacking the O-C-N bond in the polyimide structure.
Battery (electricity)CathodeAnodeGalvanic cell

Question 7: A simple example is polyethylene, whose repeating unit is based on ethylene (________ name ethene) monomer.
PotassiumInternational Union of Pure and Applied ChemistryIUPAC nomenclatureCarbon

Question 8: What does the following picture show?

  Microstructure of part of a DNA double helix biopolymer
  Appearance of real linear polymer chains as recorded using an atomic force microscope on surface under liquid medium. Chain contour length for this polymer is ~204 nm; thickness is ~0.4 nm.[1]
  Dendrimer and dendron

Question 9: ________ is used to determine the number average molecular weight, weight average molecular weight, and polydispersity.
Gel permeation chromatographyPolymerMark–Houwink equationMolar mass distribution

Question 10: The development of vulcanization later in the nineteenth century improved the durability of the natural polymer ________, signifying the first popularized semi-synthetic polymer.
LatexSynthetic rubberNatural rubberEngland
















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