| Other Resources: 59 results |
Molecular Models of Polymers Used in Sports Equipment William F. Coleman
In keeping with the 2008 National Chemistry Week theme of Having a Ball with Chemistry, the Featured Molecules this month are a number of monomers and their associated polymers taken from a paper by Sandy Van Natta and John P. Williams on polymers used in making equipment for a variety of high-impact sports (1). The molecules provide students with an introduction to an important area of applied chemistry and also enable them to examine complex structures using the models they have seen applied to small molecules.It is certainly instructive for students to build small polymer fragments using molecular model kits. Holding a model of n-decane, for example, and twisting it in various ways, provides real insight into the multiplicity of conformations available to supermolecules of polyethylene. Computer-based 3-dimensional structure drawing and visualization programs make it possible to construct large oligomers of known polymers and to begin to explore structural properties of new systems. Two such programs, free for academic use, are DSVisualizer and ArgusLab (2). DSVisualizer includes a useful set of tools for building and viewing structures and a clean geometry option that applies a Dreiding-like force field. ArgusLab adds the ability to perform both molecular mechanics and semi-empirical geometry optimization and to display various molecular surfaces. Using ArgusLab, or a similar program, students can explore the relative energies of various conformations of the substances they have built electronically. Students who are being introduced to molecular modeling and the use of more sophisticated software can easily explore the effects of the modeling and convergence parameters on the stable structures that are found, and can begin to explore the difference between global and local minima on a molecular potential energy surface. Using the conformational search program in HyperChem 7.5 on a tetramer of vinyl chloride (terminated with H; of SRRS stereochemistry; only CCCC torsions varied), approximately half of the 500 structures examined fell within 6 kcal/mol of the lowest energy structure (3). This number would increase significantly if other torsion angles were included.The use of computational software allows us to introduce students in introductory chemistry to the idea of multiple conformations, which is so important in biochemistry and much of organic chemistry. In teaching ideas behind conformational stability care should be taken when attributing conformational stability solely to non-bonded repulsions between peripheral atoms on adjacent carbon atoms. Weinhold and co-workers have recently presented strong evidence that the stability of the staggered conformer of ethane relative to the eclipsed form arises from more favorable interactions of C-H sigma bonding orbitals on adjacent carbons (4). The multiplicity of such interactions could well be responsible for conformational stability in more complex systems. Any discussion of conformational stability should also introduce students to the ultimate conformational problem, the folding of proteins and to the Folding@home project (5).
Polymerization |
Applications of Chemistry
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Characteristics of Materials American Chemical Society
What makes diapers absorbent? Is peanut butter stickier than syrup or jelly? Strong, stretchy, sticky, or sweet—everything around us has special properties which make them unique. See if you can identify and compare the characteristics of materials.
Industrial Chemistry |
Physical Properties |
Reactions |
Consumer Chemistry |
Gases |
Carbohydrates |
Proteins / Peptides |
Crystals / Crystallography |
Water / Water Chemistry |
Plant Chemistry |
Dyes / Pigments |
Lipids |
Molecular Properties / Structure |
Applications of Chemistry |
Nutrition |
Acids / Bases |
Chromatography |
Magnetic Properties |
Metals |
Polymerization |
Solutions / Solvents |
Descriptive Chemistry |
Food Science
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Addition Polymers Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Polymerization
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Condensation Polymers Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Polymerization
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Copoly; A Tool for Understanding Copolymerization and Monomer Sequence Distribution of Copolymers Massoud Miri, Juan A. Morales-Tirado
The study of the composition and monomer sequence distribution of binary copolymers is often complicated because of the many definitions of representative properties for the sequence distribution, the numerous calculations required, and occasionally the abstract treatment of the statistical processes describing the copolymer formation. Copoly resolves these issues with a user-friendly, highly visual interface to perform all calculations. Using Microsoft Excel and Word, Copoly is compatible with Windows and Mac OS. In Copoly the students enter up to five independent data parameters using the Data Input Window, and immediately see the results. To obtain diagrams for a copolymerization obeying a second-order Markovian process, the fraction of one monomer, A, and the reactivity ratios, rA, rB, rA´ and rB´ need to be entered; for a first-order Markovian process only the first three of these are required. For a Bernoullian- or zeroth-order Markovian process only A and rA are required. The results are displayed on separate sheets labeled: 1. Copolymerization Diagrams, 2. Dyads and Triads, 3. Sequence Length Distribution, 4. Simulated Copolymer Design, and 5. Summary.
Polymerization
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The Origin of Nylon Robert Hetue
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Polymerization
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ChemPaths 104 F Jan 28 John W. Moore
Today in Chem 104:
* Lecture: Polymers; Problem-Solving Session (email questions or topics to Prof. Moore jwmoore@chem.wisc.edu by 9am today)
* No reading assigned for today.
* Homework #2 due 11:55pm Today!
Polymerization
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Slime and Goo American Chemical Society
ACS Science for Kids activities exploring the properties of polymers.
Polymerization
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Polymers-Characteristics of Materials American Chemical Society
ACS Science for Kids explores the properties of polymers.
Polymerization
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Phlogiston (GCMP) David M. Whisnant
Phlogiston: this is a resource in the collection "General Chemistry Multimedia Problems". In this problem we will think back to the last half of the 18th century when modern chemistry was beginning to take place. One of the major problems occupying chemists at the time was combustion. The dominant theory of combustion in the mid-18th century involved a substance called "phlogiston." General Chemistry Multimedia Problems ask students questions about experiments they see presented using videos and images. The questions asked apply concepts from different parts of an introductory course, encouraging students to decompartmentalize the material.
Applications of Chemistry
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The Behavior of Materials
Volume 04, issue 02 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Applications of Chemistry
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Chemistry and Warfare
Volume 04, issue 09 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Applications of Chemistry
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Achievements of Young Chemists
Volume 04, issue 34 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Applications of Chemistry
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Special Chemistry Club Number
Volume 05, issue 02 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Applications of Chemistry
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Chemistry in Sports, Physiology & Health Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry
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Chemistry with Cultural Connections Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry
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Chemistry in the Environment Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry
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Chemistry Lecture Demonstrations Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry
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Gravitational and Electrostatic Potential Energy Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry
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ChemPaths 104 W Feb 16 John W. Moore
Today in Chem 104:
Exam I (in room 1351, 1:20 to 2:10 pm)
Bring calculator, pencils, eraser, and 3x5 card.
Be prepared to THINK!
Applications of Chemistry
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Chemistry in Everyday Life Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry
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Sound and Light American Chemical Society
ACS Science for Kids activities explore the properties of sound and light.
Applications of Chemistry
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Recycling-ACS Science for Kids American Chemical Society
ACS Science for Kids activities that explore recycling and the chemistry behind it.
Applications of Chemistry
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Meg A. Mole Future Chemist American Chemical Society
Meg A. Mole visits different chemists to learn about their jobs. She is always amazed at the variety of things that they do.
Applications of Chemistry
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Creative Chemistry
Volume 04, issue 15 of a series of leaflets covering subjects of interest to students of elementary chemistry distributed in 1929 - 1932.
Applications of Chemistry |
Synthesis
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Chemistry in Geology John W. Moore, Ed Vitz, Justin Shorb
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Geochemistry
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Chemistry in Foods Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Nutrition
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Chemistry in Biology Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Biological Cells
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Chemistry in Forensics Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Forensic Chemistry
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Ice Houses Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Thermodynamics |
Applications of Chemistry
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Uses of Artificial Isotopes Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Isotopes |
Applications of Chemistry
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Nuclear Power Plants Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Nuclear / Radiochemistry
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Breeder Reactors Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Nuclear / Radiochemistry
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Chemistry in Physics Ed Vitz, Justin Shorb
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Physical Properties
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Motion-Science for Kids American Chemical Society
ACS Science for Kids activities explore the properties of objects in motion and the effects of friction.
Physical Properties |
Applications of Chemistry
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Health and Wellness American Chemical Society
ACS Science for Kids activities exploring the chemistry of the human body and health.
Bioenergetics |
Applications of Chemistry |
Nutrition
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Solids, Liquids & Gases American Chemical Society
ACS Science for Kids resources explore the chemical and physical properties of solids, liquids, and gases.
Applications of Chemistry |
Gases |
Solids |
Liquids
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Motion & Energy American Chemical Society
ACS Science for Kids activities and assessments that explore aspects of motion and energy.
Applications of Chemistry |
Chemometrics |
Physical Properties
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Air-Science for Kids American Chemical Society
ACS Science for Kids activities exploring the chemistry of air.
Atmospheric Chemistry |
Applications of Chemistry |
Gases
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Your Senses American Chemical Society
ACS Science for Kids activities that explore the chemistry behind our senses.
Molecular Properties / Structure |
Applications of Chemistry
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ChemPaths 104 W Jan 26 John W. Moore
Today in Chem 104:
* Lecture: Organic Chemistry; Polymers
* Reading:
Kotz: Ch. 10, Sec. 5
Moore: Ch 12, Sec 5-6
* Homework #2 due 11:55pm F Jan 28.
* Quiz 1 in 2nd Discussion section
Esters |
Polymerization
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Polysaccharides Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Carbohydrates |
Polymerization
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Vacuum Distillation of Gin and Food Items Ed Vitz
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Phases / Phase Transitions / Diagrams |
Applications of Chemistry
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Fuel Cells Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Applications of Chemistry |
Electrolytic / Galvanic Cells / Potentials
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Electricity American Chemical Society
ACS Science for Kids activities that explore the properties of electricity.a
Electrochemistry |
Magnetic Properties |
Metals |
Applications of Chemistry
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Art & Toys American Chemical Society
ACS Science for Kids activities exploring the chemistry involved in art and toys.
Dyes / Pigments |
Applications of Chemistry |
Physical Properties
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Synthetic Macromolecules: Some Applied Organic Chemistry Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Materials Science |
Polymerization
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Cross-Linking Ed Vitz, John W. Moore
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Materials Science |
Polymerization
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BIODEGRADABLE PLASTICS Amperegrine57
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Polymerization |
Green Chemistry
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Bisphenol A Rrizor
A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Polymerization |
Green Chemistry
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Lake Study David M. Whisnant, James A McCormick, Benjamin Fortin, Patrick Nutter
Lake Study for Windows is a two-part simulation designed to involve students with the scientific method. It allows them to collect data, formulate hypotheses, and test the hypotheses with controlled experiments.
Thermal Analysis |
Titration / Volumetric Analysis |
Applications of Chemistry |
Quantitative Analysis
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Planet Earth American Chemical Society
ACS Science for Kids activities and tests exploring applications of chemistry on Earth.
Atmospheric Chemistry |
Applications of Chemistry |
Water / Water Chemistry |
Geochemistry |
Plant Chemistry
|
Your Body American Chemical Society
ACS Science for Kids activities explore the chemistry of the human body.
Bioenergetics |
Applications of Chemistry |
Nutrition |
Lipids |
Proteins / Peptides |
Carbohydrates |
Food Science
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Art-ACS Science for Kids American Chemical Society
ACS Science for Kids activities exploring the chemistry involved in art.
Dyes / Pigments |
Applications of Chemistry |
Solutions / Solvents |
Physical Properties
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Air-Solids, Liquids & Gases American Chemical Society
ACS Science for Kids activities explore the properties of gases.
Atmospheric Chemistry |
Acids / Bases |
Reactions |
Applications of Chemistry |
Water / Water Chemistry |
Gases
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Soap and Detergent American Chemical Society
ACS Science for Kids activities explore the properties of soap in aqueous solutions.
Lipids |
Polymerization |
Water / Water Chemistry |
Solutions / Solvents
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Food American Chemical Society
ACS Science for Kids activities that explore the chemical properties of foods.
Plant Chemistry |
Dyes / Pigments |
Lipids |
Proteins / Peptides |
Carbohydrates |
Molecular Properties / Structure |
Applications of Chemistry |
Nutrition |
Acids / Bases |
Chromatography
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Toys-ACS Science for Kids American Chemical Society
ACS Science for Kids activities explore how chemistry can be used to make toys.
Gases |
Polymerization |
Water / Water Chemistry |
Physical Properties |
Lipids |
Reactions
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Connected Chemistry Mike Stieff
Connected Chemistry, a novel learning environment for teaching chemistry, is appropriate for use in both high school and undergraduate chemistry classrooms. Connected Chemistry comprises several molecular simulations designed to enable instructors to teach chemistry using the perspective of emergent phenomena. That is, it allows students to see observed macro-level chemical phenomena, like many other scientific phenomena, as resultant from the interactions of many individual agents on a micro-level. This perspective is especially appropriate to the study of chemistry where the interactions between multitudes of molecules on the atomic level give rise to the macro-level concepts that students study in the classroom. Connected Chemistry comprises molecular simulations embedded in the NetLogo modeling software (1). The collection contains several predesigned simulations of closed chemical systems to teach specific chemistry concepts. Currently, Connected Chemistry contains models for teaching Brønsted Lowry acid base theory, enzyme kinetics, radical polymerization, buffer chemistry, kinetics, chemical equilibrium, and crystallization. Instructors and students can individually tailor the predesigned simulations or generate new simulations as they are needed in the context of a particular lesson, classroom, or department.
Acids / Bases |
Gases |
Kinetics |
Nuclear / Radiochemistry |
pH |
Titration / Volumetric Analysis |
Polymerization |
Equilibrium |
Catalysis
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