KSSM Form 5 Chapter 4 : Polymer

What are the two main categories of polymers?

• Elastomers and composites

• Amorphous polymers and crystalline polymers

• Biodegradable polymers and thermoplastics

• Natural polymers and synthetic polymers

Name a common use of thermoplastic polymers.

• Automotive parts and components

• Textiles and fabrics

• Plastic containers and packaging materials

• Construction materials and insulation

which substance is a natural polymer

• polythene

• polypropene

• polyisoprene

• polyneoprene

when substance Q is added to latex, the process of coagulation of latex slows down, What is Q

• ethanol

• water

• ethanoic acid

• ammonia solution

A student carries out an experiment. He wants to produce a rubber strip that is more resistent to heat and more elastic. He dips the rubber strips in a beaker containing disulphur dichloride and substance X. What is substance X

• ammonia solution

• methylbenzene

• ethanoic acid

• sodium chloride solution

The material used to make tyres is vulcanised rubber, which is natural rubber added with sulphur. What happens when sulphur is added into natural rubber

• rubber molecule slide more easily over each other

• sulphur atoms form cross-link between rubber molecules

• melting point of rubber decreases,

• elasticity of rubber increases

which plastic is thermosetting plastic

• nilon

• polystyrene

• polyvinyl chloride

• melamine

Which of the following is an example of an elastomer polymer

• bakelite

• melamine

• polyvinyl chloride

• styrene-butadiene rubber (SBR)

polymer X is a long chain molecule made up from repeating unit of glucose. What is polymer X

• starch

• protein

• natural rubber

• polyvinyl chloride

polymer X is a polymer that will decompose when heated and cannot be recycled. What is the type of polymer X

• thermoset

• elastomer

• thermoplastic