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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. 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






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






3. Softening agents






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






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






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






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






8. 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






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






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






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






12. Primary raw material for most polymers






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






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






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






16. 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






17. Relative configuration of adjecent asymmetric carbons






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






19. Molecule containing a highly reactive unpaired electron






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






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






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






24. 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






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






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






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






28. 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






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






30. 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






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






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






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






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






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






36. An acid and an alcohol






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






38. 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






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






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






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






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






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






44. 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






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






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






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






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






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






50. 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