Plastic packaging Quizes

Plastics are primarily made from which type of compounds?

• Inorganic salts
  

• Organic polymers

• Metals

• Ceramics

The word "plastic" is come from Latin.

• True

• False

A copolymer is composed of:

• Only one monomer

• Only natural polymers

• Two or more different monomers

• Only synthetic polymers

Which of the following is a linear polymer?

• Epoxy resin

• Phenolic resin

• Polyurethane

• Polyethylene

Which reaction involves the rearrangement of electrons in double bonds to form polymers?

• Polymerisation

• Addition

• Sublimation

• Hydrolysis

Characteristic of Thermoset plastic are:

I. Soften and melts upon heating

II. Cross-linked structure

III. Can be remolded

IV. Always transparent

V. Set permanently

• I and III

• II and V

• II, IV, and V

• I, III, and IV

Production of monomer is the first stage in manufacturing plastic containers

• True

• False

Injection molding is best described as:

• Cutting films into shapes

• Rolling sheets into tubes

• Melting polymer and injecting into a mold

• Heating and blowing air into a tube

What is a key property of HDPE compared to LDPE?

• Higher density and crystallinity

• Poorer chemical resistance

• More flexible

• Lower melting point

Which plastic is known for being soft, flexible, and having a low melting point?

• HDPE

• LDPE

• PET

• PVC