2‫ ك‬4 ‫ و‬3 ‫اسئلة بوليمر محاضرة‬
1- Are the mechanisms of ring-opening polymerization of cyclic monomers
chain-growth and step-growth reactions? Explain
2- Describe cationic polymerization of lactones, showing the initiation and
propagation process.
3- Describe anionic polymerization of lactones, showing the initiation and
propagation process.
4- Describe anionic polymerization of lactames, showing the initiation and
propagation process.
5- Write the chemical reactions for the mechanism of polymerization of
propylene oxide with boron trifluoride-water.
6- What is meaning of cyclosiloxannes polymerization with example?
7- Write the chemical reactions for the mechanism of polymerization of ethylene
oxide with sodium ethoxide?
8- Describe the initiation and propagation reactions in tetrahydrofuran
polymerization, including living polymerization?
9- Which one from these initiators sodium metal or sodium amide? Why?
10- Discuss the propagation reaction in polymerization of tetrahydrofuran
(THF)?
11- What are the instances of "living" polymerization of cyclic lactones and
what type of initiators yield this type of polymerization? Describe and give
examples.
12- Ziegler-Natta catalysts are used to produce
a) Low density polyethylene b) Isobutene c) High density poly ethylene d)
ploy styrene
13- Which of the following factors increase the crystalline properties of
polymers
a) Isotactic rearrangement of polymer b) Atactic rearrangement of polymer c)
syndiotactic d) brunched polymers
14- Classification of polymers according to stress-strain curves to
a) Ductile polymers b) condensation polymers c) addition polymers d) poly
vinyl chloride
15- Discuss the important of Thermal analysis for polymers?
16- Production of HDPE in Phillips technology by using
a) Solution polymerization b) bulk polymerization c) suspension
polymerization d) emulsifying polymerization