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. 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






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






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






4. Softening agents






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






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






7. 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






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






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






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






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






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






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






14. 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






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






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






17. Coloring agents that do not dissolve into the polymer






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






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






20. 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






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






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






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






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






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






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






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






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






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






30. 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






31. Is not asymetric and cannot have multiple configurations






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






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






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






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






37. 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






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






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






40. Primary raw material for most polymers






41. Covalent bonding of the polymer backbone and side groups






42. Relative configuration of adjecent asymmetric carbons






43. 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






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






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






46. Simple polymeric material produced as pellets in large quantities






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






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






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






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