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Polyethylene: Quiz


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Question 1: This results in a lower tensile strength and increased ________.

Question 2: The lack of branching is ensured by an appropriate choice of catalyst (for example, ________ catalysts or Ziegler-Natta catalysts) and reaction conditions.

Question 3: LLDPE is a substantially linear polymer with significant numbers of short branches, commonly made by ________ of ethylene with short-chain alpha-olefins (for example, 1-butene, 1-hexene and 1-octene).
CopolymerGlass transitionPolystyrenePoly(methyl methacrylate)

Question 4: ________ (PEX or XLPE)
PlasticPoly(methyl methacrylate)Cross-linked polyethylenePolystyrene

Question 5: The mechanical properties of PE depend significantly on variables such as the extent and type of branching, the crystal structure and the ________.
HydrogenAtomic massDeuteriumMolecular mass

Question 6: HDPE can be produced by chromium/silica catalysts, ________ or metallocene catalysts.
Ziegler-Natta catalystHapticityOrganometallic chemistryOlefin metathesis

Question 7: Polyethylene contains the chemical elements ________ and hydrogen.

Question 8: Polyethylene (other than cross-linked polyethylene) usually can be dissolved at elevated temperatures in ________ such as toluene or xylene, or in chlorinated solvents such as trichloroethane or trichlorobenzene.
Electrophilic aromatic substitutionAromaticityAromatic hydrocarbonNaphthalene

Question 9: Polyethylene or polythene (________ name polyethene or poly(methylene)) is the most widely used plastic, with an annual production of approximately 80 million metric tons.
CarbonPotassiumInternational Union of Pure and Applied ChemistryIUPAC nomenclature

Question 10: Two-part polyurethane or ________

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