Which of the following elements is necessary for the vulcanization of rubber?
A) sulfur
B) silicon
C) phosphorus
D) boron
E) titanium
Correct Answer:
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Q74: What are copolymers?
Q75: Draw the structure of the polymer produced
Q76: Natural rubber is a _.
A) polyamide
B) polyester
C)
Q77: Shown below is a segment of polypropylene.
Q78: The structure of cellulose is shown below.
Q80: Nylon 6 is a _.
A) polyurethane
B) polyester
C)
Q81: When the polymer below is hydrolyzed under
Q82: When the polymer below is hydrolyzed under
Q83: What type of polymer is Lexan?
A) polyester
B)
Q84: What type of polymer is shown below?
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