QUIZ POLYMERS

• Which of the following best describes a polymer?

  Answer: A large molecule made up of repeating monomer units.
• What differentiates all plastics from other polymers?

  Answer: All plastics are polymers, but not all polymers are plastics.
• Which of the following is NOT a natural polymer?

  Answer: Nylon
• What process allows monomers to link together to form polymers?

  Answer: Polymerization
• Which statement about polyethylene (PE) is TRUE?

  Answer: It is made from the polymerization of ethylene gas.
• Which of the following describes a homopolymer?

  Answer: A polymer made from only one type of monomer.
• What structural characteristic allows high-density polyethylene (HDPE) to be more rigid than low-density polyethylene (LDPE)?

  Answer: Long, unbranched chains
• Which of the following synthetic polymers is used in waterproof boots and garden hoses?


  Polyvinyl chloride (PVC)
• What property is most affected by the molecular weight of a polymer?


  Answer: Viscosity
• Which description fits a crosslinked polymer best?

   Answer: A polymer with a three-dimensional network structure.
• What is the main use of linear polymers such as polystyrene?

  Answer: Producing food containers and CD cases
• Which material is typically produced from crude oil and serves as a raw material for synthetic polymers?

  Answer: Ethylene
• Which statement about polytetrafluoroethylene (PTFE) is correct?

  It is commonly known as Teflon and used for non-stick cookware
• What type of polymer structure provides unique mechanical and thermal properties in adhesives like epoxy?


  Crosslinked polymer structure
• Which of the following is a key factor in determining the physical state of a polymer at room temperature?

  Average chain length
•  What is the number-average molecular weight of the polymer?

  Answer: 21,150 g/mol
• What is the weight-average molecular weight of the polymer?

  23, 200 g/mol
• What is the polydispersity index of the polymer?

  Answer: 1.10
•  If the polymer is a polyvinyl chloride (PVC), what is the repeat unit?

  Answer -CH2-CHCl-
• What is the degree of polymerization of the polymer?

  338.5 g/mol
• A -Polymer- is a molecular compound that is distinguished by a high molar mass, ranging into thousands and even millions of mass and they are made up of many repeating units.
• CRUDE OIL - s the starting material for many plastics, pharmaceuticals, fabrics, and other carbon-based products.
• ETHYLENE - The hydrocarbon  __________ (C2H4) is a gas at ambient temperature and pressure.
• POLYTETRAFLUOROETHYLENE - Teflon, also known as _______________, belongs to the fluorocarbon family of polymers.
• CROSSLINKING - is a process where adjacent linear chains are joined by covalent bonds.
• POLYETHYLENE -  is used for opaque milk, juice, detergents, and shampoo bottles.
• EXPANDABLE - Polystyrene, in its “__________” form, foam cups, insulated containers, food packaging trays, egg cartons, packaging peanuts.
• POLYETHYLENE TEREPHTHALATE - is used in soft-drink bottles, clear food containers, beverage glasses, fleece fabrics, carpet yarns, fiber-fill insulation.
• 1000 - Medium molecular weight (<_____ g/mol): Polymers may be soft, waxy solids, like paraffin wax.
• DEGREE OF POLYMERIZATION - refers to the average number of repeat units in a polymer chain.
• POLYMER CRYSTALLINITY - _is the packing of molecular chains to produce an ordered atomic array.
• THERMOPLASTICS - soften when subjected to heat and later liquefies due to higher temperatures, and it solidifies when cooled, this process is reversible.
• CURING - is a term that refers to the cross-linking of thermosetting resins.
• THERMOSET PLASTICS - are less susceptible to breakage and more durable than thermoplastics.
• PHENOLICS - are strong, heat-resistant materials with excellent electrical insulating properties.
• COPOLYMERIZATION - An example is the copolymer of vinyl chloride and vinyl acetate, made by free-radical
• BLOCK COPOLYMER - When more than one homopolymer units are linked together via covalent bonds, the resulting single-chain macromolecule is called a
• POLYSTYRENE -  is a lightweight, rigid plastic used in products like packaging, insulation, and disposable containers.
• POLYACRYLATE -  is a molecule with a double bond in its backbone, aids in crosslinking, while the benzene ring reduces it, resulting in a chain-like crosslinking effect.
• VINYL CHLORIDE MONOMER - (CH2=CHCl) is a variant of ethylene, replacing one of its four H atoms with a Cl atom