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






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






3. 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






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






5. 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






6. Coloring agents that do not dissolve into the polymer






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






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






9. Porcess of breaking large organic hydrocarbons into smaller molecules






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






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






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






13. 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






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






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






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






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






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






19. 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






20. 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






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






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






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






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






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






26. 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






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






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






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






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






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






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






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






34. Double bounded organic molecule used to begin addition polymerization






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






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






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






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






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






40. Simple polymeric material produced as pellets in large quantities






41. 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






42. Atoms attached to the polymer backbone.






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






44. 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






45. Primary raw material for most polymers






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






47. 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






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






49. An acid and an alcohol






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