What is an initiator and why is it important in a polymerization reaction?
What will be an ideal response?
Initiators are materials that start a chemical reaction. In the case of polymers, the reaction is usually either a polymerization or a crosslinking reaction. The most common initiator is a peroxide which breaks apart, usually when heated or through certain chemical reactions, to form free radicals
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The contractor must prioritize the submittal process, submitting and obtaining approval for materials needed for the first part of the project.
Answer the following statement true (T) or false (F)
?Chromium-molybdenum steel welds have a tensile strength of ____ psi.
A. ?10,000 to 25,000 B. ?30,000 to 45,000 C. ?60,000 to 80,000 D. ?90,000 to 100,000
A typical 6 way power seat uses ________
A) 2 electric motors and a 3-way direct acting transmission B) 6-9 separate PM non-grounded electric motors C) 1-3 motors (depending on manufacturer) D) 6 separate grounded electric motors only
Nonexpanding foam can be used to insulate _____
a. siphon-jet urinals b. fiberglass showers c. domestic dishwashers d. plastic bathtubs