7 Polymer Cross-Linking and Viscosity Results and Discussions

7 Polymer Cross-Linking and Viscosity Results and Discussions

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Results and Discussion: The experiment was implemented in order to become acquainted with how monomers crosslink and connect to create polymers and relate the cross-linking to polymer viscosity. In this experiment, polymers of the simple vinyl acetate monomer were polymerized into Poly vinyl acetate, and then hydrolyzed in a basic solution to create poly vinyl alcohol (Equation 1). Polymerization Hydrolyzed Vinyl Acetate Poly(vinyl acetate) Poly(vinyl alcohol) (1) Tap water was heated to about 90ºC and then the poly vinyl alcohol (PVA) solution was added in small amounts in order to be dissolved. After the PVA was dissolved, the viscosity was measured. The system used to determine viscosity was qualitative (subjective) and was based on a scale of 1 to 10, 1 not being very viscous (like water) and 10 being extremely viscous (almost like a solid). Analogies were also used to coincide with the assigned number on the scale. The viscosity of the PVA after it had been dissolved was determined to be 3, equivalent to whole
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This note was uploaded on 03/10/2008 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell University (Engineering School).

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7 Polymer Cross-Linking and Viscosity Results and Discussions

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