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- Title: super_absorbent_polymers
- Type: Notes
- School: Cincinnati
- Course: CHEM 652
- Term: Winter
Coursehero >> Ohio >> Cincinnati >> CHEM 652
Path: Cincinnati >> CHEM >> 652 Winter, 2008
Path: Cincinnati >> CHEM >> 652 Winter, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MLTI >> 300 Fall, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Path: Cincinnati >> MTEN >> 634 Winter, 2008
Course Hero has millions of student submitted documents similar to the one below including study guides, homework solutions, papers, and exam answer keys.
Absorbent Super Polymers Introduction: The super-absorbent material has many applications, for example, it is used in the disposable diapers that can absorb a large amount of water, which helps the baby stay dry for more time. The chemical used in the diapers is mostly sodium polyacrylate; it is also used in soil moist that is a synthetic polyacrylamide with a potassium salt base, it is a safe, non-toxic polymer and can hold over 200 times its weight in water, release it slowly over time in horticultural applications. In the industry, super-absorbent polymers can be used in oil drilling and reducing soil errosion. Purpose: To find out how much water can be absorbed by the super-absorbent materials, such as the materials in diapers and soil moist. And determine which types of water can be absorbed most effectively. Materials: Glass vial, plastic cup, pool water, plain water, salt, food color, colorful sparkle, diapers and soil moist. Procedure: Diaper Rip open a diaper and remove some filler. Put a drop of water on the polypropylene layers (inner and outer). Take 4 cups and put diaper filler in each cup. Weigh each cup. Fill cup with tap water, swimming pool water, ocean water and salt water (10%). Wait a few minutes. Pour out extra water. (Feel materials in cup. Is it dry or wet?) Weight each cup again. Compare these cups. Add salt, does the gel collapse? Soil Moist Add glitter and the proper amount of Soil Moist into a jar. Fill the jar with colored water (not too dark), and mix well. Allow the product to gel. Place the plastic items (seahorses, etc.) on the surface, one at a and time, push into desired position with a stick. Add a little water to fill the jar. Cap the jar, seal with hot glue if desired. Scientific Explanation: ( from www.psrc.usm.edu/macrog/) Sodium polyacryalte is a type of polyelectrolyte. When it is put into water, it just breaks apart into positive and negative ions as sodium chloride. [ CH2 CH2]n C O- + Na O H2 O [ CH2 CH2]n C OO + Na+ But weird things happen for the polyelectrolytes. Normal uncharged polymer molecules, when they're in solution tend to be tangled up in what big shot scientists call a random coil, All those negative charges are going to repel each other. This does weird things to the polymer chain. But when the polymer chain is covered with negative charges (which repel each other), the polymer can't be bunched in on itself. So the chain stretches out, like this: This makes the solution (remember we're talking about polyelectrolytes in solution) more viscous. Think about it. When the polyelectrolyte chain stretches out it takes up more space, and is more effective at resisting the flow of the solvent molecules around it. So the solution becomes thick and syrupy. But there's a way you can stop this from happening. If one take a solution of a polyelectrolyte in water, and throws in a lot of salt. Something fun will happen. The NaCl will separate into Na+ and Cl- ions. In the case of a negatively charged polyelectrolyte, the positively charged Na+ ions will get in between the negative charges on the polymer, and cancel them out in effect. When this happens, the polymer chain collapses back into random coil again.
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Description: 060331 Quiz 1 Polymer Properties This week we discussed the difference between the view of a polymer chain by a chemist, physicist and engineer (rheologist). We also discussed differences between models, simulations and experiments. An example of the...
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Description: THE JOURNAL OF CHEMICAL PHYSICS 125, 204901 2006 A Monte Carlo simulation study of branched polymers Arun Yethiraj Theoretical Chemistry Institute and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706 Received 24 October 20...
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Description: Polymer Properties Quiz 3 080130 The characteristic ratio, Cn, is the ratio of observed end-to-end distance, and the end-to-end distance of a freely jointed chain composed of n bonds of step length lchem, r2 l2 0 Cn = = stat. seg. length 2 2 n chem l...
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Description: Hydrodyamic Radius, RH: In addition to the analytic size of a linear (C=1) chain, the end to end distance, Reted or R0, and the structural size, the radius or gyration, Rg, dynamic measurements yield a size called the hydrodynamic radius, RH. Conside...
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Description: Quiz 8 Polymer Physics 11/18/00 The Rouse model represents a polymer coil as a series of beads and springs. a) The Rouse spring has a spring constant based on rubber elasticity theory. This is sometimes called the ideal rubber law in analogy to an id...
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Description: 060512 Quiz 7 Polymer Properties This week we covered the concentration dependencies of the osmotic pressure of a polymer solution using the concentration blob model and the Flory-Huggins (F-H) equation for polymer solutions and blends. 1) Last weeks...