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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. Atoms attached to the polymer backbone.






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






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






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






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






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






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






10. Double bounded organic molecule used to begin addition polymerization






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






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






13. Simple polymeric material produced as pellets in large quantities






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






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






16. 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






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






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






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






20. Primary raw material for most polymers






21. Porcess of breaking large organic hydrocarbons into smaller molecules






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






23. 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






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






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






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






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






28. 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






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






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






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






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






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






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






35. 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






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






37. Relative configuration of adjecent asymmetric carbons






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






39. 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






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






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






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






43. 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






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






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






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






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






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






49. An acid and an alcohol






50. Softening agents