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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. Number of bonds a molecule has formed






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






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






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






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






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






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






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






9. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern






10. 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






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






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. 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






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






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






16. 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






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






18. Term used to represent the average molecular weight of a sample containing a wide range of polymer chain lengths. this term is used to avoid confusion between the number average and the weight molecular average weight






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






20. Type of plymer processing similar to extrusion but can be used to develop parts with complex shapes rapidly






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






22. Double bounded organic molecule used to begin addition polymerization






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






24. First step in the process of polymerization - during which a free radical is formed






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






26. Coloring agents that do not dissolve into the polymer






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






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






29. 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






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






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






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






33. Atoms attached to the polymer backbone.






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






35. An acid and an alcohol






36. Primary raw material for most polymers






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






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






39. 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






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






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






42. 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






43. Is not asymetric and cannot have multiple configurations






44. Relative configuration of adjecent asymmetric carbons






45. Covalent bonding of the polymer backbone and side groups






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






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






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






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






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