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






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






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






4. Primary raw material for most polymers






5. Additives whose primary purpose is to reduce the final cost of the product






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






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






8. Broad category of polymers that includes polymers containing urethane linkages






9. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber






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






11. Double bounded organic molecule used to begin addition polymerization






12. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air






13. 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






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






15. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.






16. 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






17. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer






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






19. Carbon atom capable of multiple configurations due to four different substituents






20. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties






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






22. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device






23. Atoms attached to the polymer backbone.






24. Terminating a condensation/step- growth polymerization reaction by adding a material with only one functional group






25. Conformation in which the largest substituents are offset by 180






26. Relative configuration of adjecent asymmetric carbons






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






28. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...






29. Molecule containing a highly reactive unpaired electron






30. Porcess of breaking large organic hydrocarbons into smaller molecules






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






32. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit






33. Polymer made up of two of more differenet monomers covalently bonded together






34. Last step in the polymerization process - which occurs when the free radical of a polymer chain joins the free radical on an end group






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






36. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret






37. Polymers that contain amide (- N-) groups in the chain






38. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer






39. Covalent bonding of the polymer backbone and side groups






40. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings






41. Polymers comprised of two or more different monomers that attach to the chain in long runs of one type of monomer - followed by another monomer AAAAAAAAAAAAABBBBBBBBBBBBBBBBBBAAAAAAAA






42. Softening agents






43. Polymer that is made up a single repeat unit






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






45. Coloring agents that do not dissolve into the polymer






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






47. Form of the molecular weight of a sample of polymer chains determined by dividing the mass of the specimen by total number of mols present; always less than weight average molecular weight; all molecules regardless of size correlate well with Mn






48. 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






49. Process used to make thermoset fibers by performing the polymerization reacting in a solbent as the material flows through a spinneret and into a quenching bath






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