Test your basic knowledge |

Modern Material Science And Engineering 2

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Polymer made up of two of more differenet monomers covalently bonded together






2. Conformation that occurs when the largest substituent in a molecule are offset by 60






3. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property






4. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret






5. Low- molecular- weight building blocks repeated in the polymer chain






6. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain






7. Primary raw material for most polymers






8. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance






9. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed






10. Formation of a plymer that occurs when two potentially reactive end groups on a polymer react to form a new covalent bond between the polymer chains. this reaction also forms a biproduct - usually water






11. Softening agents






12. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains






13. Smallest repeating unit in a polymer. aka repeat unit






14. Relative configuration of adjecent asymmetric carbons






15. Arrangement of the largest substituents where the substituets are offset by 120






16. Double bounded organic molecule used to begin addition polymerization






17. Covalently bonded chains of molecules with small monomer units repeated from end to end






18. Polymer that is made up a single repeat unit






19. One of the two different types of termination in the polymerization process. during this type of termination - the free radicals from two different polymer chains join to end the propogation process






20. Coloring agents that do not dissolve into the polymer






21. Pigments or dyes that change the way light is absorbed or reflected by a polymer






22. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties






23. Long chain polymers that contain at least 85% of an ester of a substituted aromatic carboxylic acid. these fibers are strong and can dyed or made transpared






24. Molecule containing a highly reactive unpaired electron






25. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit






26. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets






27. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads






28. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability






29. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light






30. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants






31. Formation of side chains along the backbone; presence of branches disrupts the interactions beween adjacent chains; lowering the tensile strength - melting point - stiffness - crystallinity - and density






32. Additives that cause swelling - which allows the polymer chains to slide past one another more easily - making the polymer softer and more pliable. also used to decrease the viscosity of cement paste to make it easier to flow






33. Porcess of breaking large organic hydrocarbons into smaller molecules






34. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants






35. Configuration of a substituent in a polymer - in which the substituent is located on the same side of the polymer chain in all repeating units






36. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination






37. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups






38. An acid and an alcohol






39. Second- order thermodynamic transition in which the onset of large scale chain mobility occures in polymers. Bellow Tg the polymer is glasslike and brittle. above Tg the polymer becomes rubbery and flexible






40. Number of bonds a molecule has formed






41. Two or more polymers mechanically mixed together but without covalent bonding between them






42. Specific arrangements of atoms that cause organic compounds to behave in predictable ways






43. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end






44. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process






45. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds






46. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)






47. Is not asymetric and cannot have multiple configurations






48. Part of the polymer processing apparatus through which the polymer is pushed - causing the polymer to form a simple shape - such as a rod or tube






49. Covalent bonding of the polymer backbone and side groups






50. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals