Chemistry

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Across
  1. 4. Polymerized ethylene.
  2. 6. Important for the production of chemicals.
  3. 8. These are not always cube shaped.
  4. 11. Combine nanoparticles with other nanoparticles or with larger, bulk-type materials.
  5. 13. Do not store in metal.
  6. 14. The ability of the plastic to resist abrasion and wear.
  7. 15. Should be used when there is a risk of adverse exposure of chemicals to the skin.
  8. 16. A nanomaterials may be incidentally produced as a byproduct of mechanical or industrial processes.
  9. 17. These nanomaterials are nanosized polymers built from branched units.
  10. 18. The process of mixing these additives to virgin plastics.
  11. 19. Condensation products of dicarboxylic acid with dihydroxy alcohols.
  12. 22. A self-reactive substances.
  13. 23. This process is used to obtain three-dimensional articles from two-dimensional sheets.
  14. 24. A chemical that is not corrosive, but causes reversible inflammatory effects on living tissue at the site of contact.
  15. 25. The extent to which the polymer chains are arranged in a regular structure instead of a random fashion.
  16. 26. It is the study of manipulating matter on an atomic and molecular scale.
  17. 27. Substances that emit a flammable gas upon contact with water.
  18. 28. Chemicals that have flash points of 100200oF.
  19. 30. react vigorously with reducing materials.
  20. 32. Breathing in contaminated air is the most common way that workplace chemicals enter the body.
  21. 33. Modify the properties of plastics to give the final plastic, better hardness, tensile strength, finish and workability.
  22. 34. Chemicals vary widely in how toxic (poisonous) they are.
  23. 35. Belongs to the synthetic polymers family and is also known as polyamides.
  24. 38. Hard and rigid at room temperature and do not soften on heating.
Down
  1. 1. The amount of exposure to a chemical is the single most significant factor of concern.
  2. 2. These bonds are extremely strong and very hard to break.
  3. 3. Macromolecules of high molecular weight which are formed by linkage between large numbers of small molecules called monomers.
  4. 5. A nanomaterials that have been deliberately engineered and manufactured by humans to have certain required properties.
  5. 7. Workplace chemicals may be swallowed accidentally if foods or hands are contaminated.
  6. 9. High polymers, which have elastic properties and can be stretched up to about 300 percent.
  7. 10. Class of high polymers which can be molded into any desired form by heat and pressure.
  8. 11. A chemical that causes cancer.
  9. 12. The tendency of a polymer to pass extraneous materials.
  10. 18. Any solid material with its atoms, or smallest units of matter, organized in a repeating pattern.
  11. 20. Two or more monomers undergoing joint polymerization.
  12. 21. An important tool in conveying risk information to employees.
  13. 26. Chemical substances or materials that are manufactured and used at a very small scale.
  14. 29. Atoms or group of atoms forming a building block of the smallest acceptable size of the whole volume of a crystal .
  15. 31. Occurs when exposure to two or more chemicals at a time results in health effects that are greater than the sum of the effects of the individual chemicals.
  16. 36. An infinite periodic array of points in a space.
  17. 37. Electrostatic attraction between two polar groups.