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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. Simple polymeric material produced as pellets in large quantities






2. Double bounded organic molecule used to begin addition polymerization






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






4. 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






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






6. Molecule containing a highly reactive unpaired electron






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






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






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






10. 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






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






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






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






14. Polymer that is made up a single repeat unit






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






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






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






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






19. An acid and an alcohol






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






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






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






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






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






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






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






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






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






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






30. 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






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






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






33. 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






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






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






36. 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






37. 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






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






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






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






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






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






43. Relative configuration of adjecent asymmetric carbons






44. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance






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






46. Primary raw material for most polymers






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






48. Softening agents






49. Coloring agents that do not dissolve into the polymer






50. 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