Test your basic knowledge |

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






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






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






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






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. 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






8. Molecule containing a highly reactive unpaired electron






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






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






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






12. 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






13. Double bounded organic molecule used to begin addition polymerization






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






15. Polymer that is made up a single repeat unit






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






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






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






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






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






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






22. Covalent bonding of the polymer backbone and side groups






23. Coloring agents that do not dissolve into the polymer






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






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






26. Softening agents






27. 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






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






29. Atoms attached to the polymer backbone.






30. Simple polymeric material produced as pellets in large quantities






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






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






33. 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






34. 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






35. 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






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






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






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






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






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






41. An acid and an alcohol






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






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






44. 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






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






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. 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






49. 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






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