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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 that contain amide (- N-) groups in the chain






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






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






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






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






7. Relative configuration of adjecent asymmetric carbons






8. An acid and an alcohol






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






10. 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






11. 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






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






13. 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






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






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






16. 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






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






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






19. Coloring agents that do not dissolve into the polymer






20. Polymer that is made up a single repeat unit






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






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






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






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






25. Atoms attached to the polymer backbone.






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






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






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






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






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






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






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






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






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






36. Softening agents






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






38. Term used to represent the average molecular weight of a sample containing a wide range of polymer chain lengths. this term is used to avoid confusion between the number average and the weight molecular average weight






39. Number of bonds a molecule has formed






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






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






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






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






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






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






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






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






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






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






50. 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