HW6_Solutions - Homework 6 PART A. Definitions and...

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Homework 6 PART A. Definitions and Nomenclature (5 points-1 point each) 1. When R groups are randomly aligned on either side of a polymer chain the configuration is atactic . 2. In amorphous materials below the glass transition temperature, T g , large-scale, molecular motion is not present and the material has a brittle liquid structure. 3. Conformation is the arrangement of the rotatable bonds within a molecule. 4. The ratio of the weight average molecular weight to the number average molecular weight is referred to as the polydispersity . 5. The number of repeat units in a polymer is the degree of polymerization .
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PART B. Circle the appropriate response. (10 points-each 1 point) 1. Decreasing the temperature of a glass forming system increases the viscosity of the liquid. 2. Decreasing cooling rate decreases the glass transition Temperature, T g . 3. Below the glass transition temperature the entropy of the glass is greater than the entropy of the corresponding crystalline form of the material. 4.
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This note was uploaded on 09/12/2011 for the course MSE 2001 taught by Professor Tannebaum during the Fall '08 term at Georgia Institute of Technology.

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HW6_Solutions - Homework 6 PART A. Definitions and...

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