15 May WHICH OF THE FOLLOWING STATEMENTS IS INCORRECT REGARDING TEFLON?
Polyester is the result of what kind of reaction?
Organic acids and carbon-based materials
An oxygen-reduction reaction
Benzene and acetone
Condensation polymerization reaction
Which of the following statements is INCORRECT regarding Teflon?
Teflon is reactive to corrosive acids.
Teflon is heat resistant.
Teflon is used in pacemakers and dentures.
Teflon is made from tetrafluoroethylene
What polymeric material is mainly used by the police and military as the body armor in vests and helmets?
Nomex
Kevlar
Natural rubber
GORE-TEX
When nitric acid is added to cellulose, a chemical reaction occurs, during which the cellulose is converted into:
nitrocellulose.
paper.
polyester.
acrylics
Which of the following statements about polymer decomposition and combustion is INCORRECT?
The surfaces of some polymeric products tend to char as they burn.
Burning polymeric products are only capable of releasing minimal heat.
Burning polymeric products can evolve voluminous amounts of smoke, carbon monoxide, other hazardous gases, vapor, and fumes.
Polymers frequently undergo thermal degradation into simpler chemical substances.
At a polymeric fire scene, the gases formed depend on the chemical nature of the polymers that have burned or undergone thermal decomposition. Natural polymers having an animal origin contain proteins which in turn are composed of amino acids. Of concern are two amino acids (methionnc and cysteine) as they produce the toxic gases 1) __________ upon decomposition and 2) __________ upon combustion.
Hydrogen cyanide is formed from the combustion of polyurethane and may pose an inhalation hazard. One study of polyurethane combustion indicated that the maximum yield of hydrogen cyanide per gram of polyurethane foam ranged from 0.5 to 1.05 milligrams under flaming conditions. Using this study, what is the possible maximum milligrams of hydrogen cyanide that is formed when 5 kilograms of polyurethane foam is burned during a fire incident?
A substance that is added to a polymerization tank to prevent or reduce the speed of autopolymerization is called 1) __________. One specific chemical that is used for this purpose is 2) __________.
A known human carcinogen that is used in the production of polychloroprene is called __________.
What toxic substance that has a lethal dose of 2,000 to 5,000 ppm to laboratory animals has been detected in smoke from polymeric fires? __________.
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