POLYMER TECHNOLOGY QUIZ

Trade name of __________ is neoprene.

Polychloroprene

Polytetraflouroethylene

Polyisoprene

Poly vinyl acetate

TRUE ANSWER : ?
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Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its

Flexibility

Chemical resistance

All of these

Tensile strength

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Cellulose is the main contituent of most __________ fibres.

Synthetic

Natural

Acrylic

Spandex

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Branched chain polymers compared to linear polymers have higher

Density

Tensile strength

Degree of irregularity in atomic packing

Melting point

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Epoxy resins (i.e., epoxide polymers)

Are cross-linked polymers only

Use emulsion polymerisation methods

Contain an epoxy group ( ##### ) at the ends of the polymer

Are made by addition polymerisation reaction only

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Elastomers are

Thermosetting material

Exemplified by protein derivatives

Having very high tensile strength and heat resistance

Having high flexural strength

TRUE ANSWER : ?
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Flexible plastic pipes are made of

Polypropylene

Unsaturated polyester

High density polyethylene (HDPE)

Low density polyethylene (LDPE)

TRUE ANSWER : ?
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__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).

Unsaturated polyester

Alkyd resins

Amino resins

Saturated polyester

TRUE ANSWER : ?
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Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of

Buna S

Butyl rubber

Bunai N

Cold SBR

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Buna-S is also called

Bakelite

Polyurathane

SBR

Teflon

TRUE ANSWER : ?
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