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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. Primary raw material for most polymers






2. 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






3. 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






4. Polymer that is made up a single repeat unit






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






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






7. Coloring agents that do not dissolve into the polymer






8. An acid and an alcohol






9. 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






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






11. 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






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






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






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






15. Relative configuration of adjecent asymmetric carbons






16. 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






17. Is not asymetric and cannot have multiple configurations






18. Double bounded organic molecule used to begin addition polymerization






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






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






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






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






23. Simple polymeric material produced as pellets in large quantities






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






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






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






27. 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






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






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






30. 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






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






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






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






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






35. 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






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






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






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






39. 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






40. Softening agents






41. Number of bonds a molecule has formed






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






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






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






46. Porcess of breaking large organic hydrocarbons into smaller molecules






47. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)






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






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






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