June 2014
Intermediate to advanced
688 pages
19h 5m
English
Content preview from Polymer Science and Technology, 3rd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 3. Conformation, Solutions, and Molecular Weight
Solvents are frequently used during the polymerization process (Chapter 2), during fabrication (e.g., film casting, fiber formation, and coatings), and for determining molecular weights and molecular-weight distributions. Interactions between a polymer and solvent influence chain dimensions (i.e., conformations) and, more importantly, determine solvent activities. The measurement of osmotic pressure and scattered-light intensity from dilute polymer solutions—techniques based upon the principles of polymer-solution thermodynamics—are the primary methods used to determine number-average and weight-average molecular weights, respectively. Other solution-property techniques, such as the determination ...
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