Polymerization Mechanisms
Chemistry ⇒ Polymers and Macromolecules
Polymerization Mechanisms starts at 11 and continues till grade 12.
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Describe the main difference between addition and condensation polymerization mechanisms.
Describe the main difference between cationic and anionic polymerization mechanisms.
Describe the main steps involved in free radical polymerization.
Describe the role of a catalyst in Ziegler-Natta polymerization.
Describe the role of chain transfer agents in polymerization.
Explain the difference between initiation and propagation in free radical polymerization.
Explain why anionic polymerization requires very pure monomers and solvents.
Explain why condensation polymerization is also called step-growth polymerization.
Which of the following is a characteristic of living polymerization? (1) No chain transfer or termination (2) Rapid chain termination (3) Formation of by-products (4) Requires water
Which of the following is a common initiator for cationic polymerization? (1) Aluminum chloride (2) Benzoyl peroxide (3) Sodium amide (4) Potassium permanganate
Which of the following is a feature of chain-growth polymerization? (1) Monomers react with each other at any stage (2) Polymer chains grow only at active centers (3) High molecular weight at low conversion (4) Both 2 and 3
Which of the following is a requirement for a monomer to undergo addition polymerization? (1) Presence of a double bond (2) Presence of two functional groups (3) Presence of a benzene ring (4) Presence of a carboxylic acid group
Fill in the blank: The initiator commonly used in free radical polymerization of styrene is ________.
Fill in the blank: The polymerization of methyl methacrylate to form PMMA is an example of ________ polymerization.
Fill in the blank: The polymerization of tetrafluoroethylene to form PTFE is an example of ________ polymerization.
Fill in the blank: The process in which a growing polymer chain transfers its active center to another molecule is called ________.
True or False: Addition polymerization involves the elimination of small molecules such as water or HCl.
True or False: Cationic polymerization is suitable for monomers with electron-withdrawing groups.
True or False: In chain-growth polymerization, the growth of polymer chains occurs only at active sites.
True or False: In chain-growth polymerization, the molecular weight of the polymer increases rapidly at the beginning of the reaction.
