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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. Covalent bonding of the polymer backbone and side groups






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






3. 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






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






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






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






7. 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






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






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






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






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






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






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






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






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






17. Double bounded organic molecule used to begin addition polymerization






18. 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






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






20. Porcess of breaking large organic hydrocarbons into smaller molecules






21. Atoms attached to the polymer backbone.






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






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






24. Covalently bonded chains of molecules with small monomer units repeated from end to end






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






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






27. 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






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






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






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






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






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






33. An acid and an alcohol






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






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






37. 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






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






39. 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






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






41. Is not asymetric and cannot have multiple configurations






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






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. Coloring agents that do not dissolve into the polymer






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






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






48. 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






49. Polymer that is made up a single repeat unit






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