Module 2: Introduction to Polymer Microstructure

In this module, we will discuss polymer microstructure and begin discussing structure-property relationships and will learn how structure and microstructure impact crystallinity (and whether or not a polymer can crystallize!), as well as how crystallinity and cross-link density can impact properties.

Read Section 2.1: Polymer Chain Microstructures in Chapter 2: Microstructure and Molecular Weight of the Polymer Science and Engineering eBook (or the equivalent in a print version).

Download the TE 200 Module 02 Study Guide and Checklist.

Study Guide for Module 02 (Can you do the following?):

1. Explain the difference between a side group and a branch.
2. Explain the impact of branching on a polymer’s ability to crystallize.
3. Describe how increasing or decreasing a polymer’s percent crystallinity affects the following properties:
   1. Strength
   2. Stiffness
   3. Toughness
   4. Brittleness
   5. Optical clarity
   6. Barrier properties
   7. Solubility
4. Explain network polymers and the two primary ways they are formed.
5. Explain the impact of cross-linking and the cross-link density on polymer properties.
6. Explain sequence isomerism.
7. Identify stereo-isomerism (tacticity) in vinyl polymers, including atactic, isotactic, and syndiotactic.
8. Explain the impact of tacticity on polymer properties, specifically a polymer’s ability to crystallize.
9. Explain structural isomerism in diene polymers and how that can impact properties.
10. Explain the four primary types of copolymers.

Let’s Review!