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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. Conformation in which the largest substituents are offset by 180






2. Polymer that is made up a single repeat unit






3. Covalent bonding of the polymer backbone and side groups






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






5. 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






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






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






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






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






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






11. 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






12. 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






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






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






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






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






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






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






19. 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






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






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






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






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






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






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






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






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






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






29. 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






30. 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






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






32. An acid and an alcohol






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






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






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






36. Number of bonds a molecule has formed






37. Atoms attached to the polymer backbone.






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






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






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






41. Primary raw material for most polymers






42. 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






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






44. Porcess of breaking large organic hydrocarbons into smaller molecules






45. Simple polymeric material produced as pellets in large quantities






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






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






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






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






50. Double bounded organic molecule used to begin addition polymerization