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






2. Simple polymeric material produced as pellets in large quantities






3. An acid and an alcohol






4. Relative configuration of adjecent asymmetric carbons






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






6. 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






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






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






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






10. Polymers that contain amide (- N-) groups in the chain






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






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






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






14. 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






15. Is not asymetric and cannot have multiple configurations






16. 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






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






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






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






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






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






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






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






24. Porcess of breaking large organic hydrocarbons into smaller molecules






25. 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






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






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






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






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






30. Atoms attached to the polymer backbone.






31. 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






32. Number of bonds a molecule has formed






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






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






35. 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






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






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






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






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






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






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






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






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






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






45. Form of the molecular weight of a sample of polymer chains determined by dividing the mass of the specimen by total number of mols present; always less than weight average molecular weight; all molecules regardless of size correlate well with Mn






46. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets






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






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






49. 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






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