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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. 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






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






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






4. 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






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






6. 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






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






8. Is not asymetric and cannot have multiple configurations






9. 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






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






11. Polymer that is made up a single repeat unit






12. 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






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






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






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






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






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






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






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






20. Number of bonds a molecule has formed






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






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






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






24. Molecule containing a highly reactive unpaired electron






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






26. Simple polymeric material produced as pellets in large quantities






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






28. Porcess of breaking large organic hydrocarbons into smaller molecules






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






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






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






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






33. Double bounded organic molecule used to begin addition polymerization






34. 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






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






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






37. 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






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






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






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






41. Covalent bonding of the polymer backbone and side groups






42. 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






43. 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






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






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






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






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






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






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






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