Exam 2 Review

Question 1

How does Step-Growth Polymerization work?

Answer 1

1. chains are slowly built in a step-wise fashion
2. Monomers react to form growing chains
3. Longer chains form as smaller chains link together

Question 2

What is a common reaction during step-growth polymerization?

Answer 2

condensation reactions

Question 3

How are smaller chains made in step-growth?

Answer 3

reactive steps

Question 4

How do polyesters form?

Answer 4

Step growth polymerization

1. bifunctional acid and bifunctional alcohol react
2. A water molecule is created at each step.

Question 5

How do you create a high molecular weight in polyesters?

Answer 5

A water molecule has to be driven off

Question 6

How are polyamides (nylon) formed?

Answer 6

Step-growth polymerization

1. amides link between two monomer units

Question 7

How is a high Mw achieved in the step-growth of polyamides (nylon)?

Answer 7

Equivalent monomer ratios

Question 8

What is chain polymerization?

Answer 8

1. Where a chain contains one active site at the end of a chain
2. Monomers are added one by one