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






2. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color






3. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed






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






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






6. Number of repeat/structural units in a polymer chain






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






8. Number of bonds a molecule has formed






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






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






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






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. Formation of a polymer that occurs when two potentially reactive end groups on a polymer react to form a new covalent bond between the polymer chain. this reaction also forms a byproduct - which is typically water






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






15. One type of polymer that contains at least 85% of polyacrylonitrile PAN






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






17. Polymer that is made up a single repeat unit






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






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






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






21. 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






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






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






24. Double bounded organic molecule used to begin addition polymerization






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






26. Molecule containing a highly reactive unpaired electron






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






28. Covalent bonding of the polymer backbone and side groups






29. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion






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






31. An acid and an alcohol






32. Relative configuration of adjecent asymmetric carbons






33. Softening agents






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






35. Is not asymetric and cannot have multiple configurations






36. 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






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






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






39. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel






40. 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






41. Part of the extrusion apparatus that contains a heated screw which is used to melt the polymer and the polymer forward into the next chamber






42. Simple polymeric material produced as pellets in large quantities






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






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






45. One method of expressing the molecular weight of sample of polymers with averaging based on weight; this method is more useful when large molecules in the sample dominate the behavior






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






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






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






49. Process of pushing polymers through a spinneret and winding the solidified fibers onto a tow - which imposes a shear stress on the fibers upstream as they emerge from the spinneret






50. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings