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Test your basic knowledge |
Modern Material Science And Engineering 2
Start Test
Study First
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. Number of bonds a molecule has formed
functionality
copolymer
secondary bonding
polymer backbone
2. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
alternating copolymers
plasticizers
atactic
polymethylmethacrylate PMMA
3. 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
block copolymers
acrylic
vinyl monomer
asymetric
4. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
cracking
addition polymerization/chain growth/free- radical polymerization
end groups
thermosets
5. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber
primary bonding
secondary bonding
spinneret
quenching
6. Polymers that contain amide (- N-) groups in the chain
addition polymerization/chain growth/free- radical polymerization
polyamides
most common condensation/step- growth polymerization occur between....
any carbon with double bonds or repeated substituents
7. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
atactic
viscose process
weight average molecular weight Mw
secondary bonding
8. 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
mutual termination
random copolymers
polymer backbone
termination
9. 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
polypphenylene terephyhalamide PPTA
glass transition temperature Tg
oligomers
hopper
10. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
thermosets
relative molecular mass RMM
gauche conformation
graft copolymers
11. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
propagation
viscose process
constitution
thermosets
12. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
polymethylmethacrylate PMMA
thermoplastics
oligomers
polymers
13. Porcess of breaking large organic hydrocarbons into smaller molecules
free radical
most common condensation/step- growth polymerization occur between....
cracking
syndiotactic dyad
14. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
end groups
propagation
oligomers
conformation
15. 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
polyamides
quenching
graft copolymers
branching
16. 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
solution spinning
side groups/ substituents
secondary bonding
acrylic
17. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
conformation
vulcanization
oligomers
polyurethanes
18. Terminating a condensation/step- growth polymerization reaction by adding a material with only one functional group
aramid
quenching
free radical
dyes
19. Atoms attached to the polymer backbone.
poly- p- phenylene benzobisoxazole PBO
monomers
side groups/ substituents
petroleum
20. Softening agents
conformation
additives
plasticizers
initiation
21. Polymer made up of two of more differenet monomers covalently bonded together
vinyl monomer
oligomers
copolymer
homopolymer
22. Smallest repeating unit in a polymer. aka repeat unit
structural unit
rayon
side groups/ substituents
branching
23. Low- molecular- weight building blocks repeated in the polymer chain
aramid
monomers
extruder
eclipsed conformation/ cis - conformation
24. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
pigments
polypphenylene terephyhalamide PPTA
dyes
injection molding
25. Is not asymetric and cannot have multiple configurations
any carbon with double bonds or repeated substituents
High volume thermoplastics HVTP
syndiotactic dyad
eclipsed conformation/ cis - conformation
26. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
stabilizers
polyviyl chloride PVC
polymer backbone
staggered conformation
27. Carbon atom capable of multiple configurations due to four different substituents
polyurethanes
staggered conformation
pigments
asymetric
28. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
structural unit
random copolymers
addition polymerization/chain growth/free- radical polymerization
termination
29. Coloring agents that do not dissolve into the polymer
any carbon with double bonds or repeated substituents
pigments
High volume thermoplastics HVTP
propagation
30. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
nylon
number average molecular weight Mn
termination
syndiotactic dyad
31. 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
isotactic dan
nylon
glass transition temperature Tg
vinyl monomer
32. Additives whose primary purpose is to reduce the final cost of the product
thermoplastics
propagation
fillers
polymers
33. First step in the process of polymerization - during which a free radical is formed
atactic
poly- p- phenylene benzobisoxazole PBO
viscose process
initiation
34. Two or more polymers mechanically mixed together but without covalent bonding between them
mutual termination
random copolymers
viscose process
blends
35. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
addition polymerization/chain growth/free- radical polymerization
gauche conformation
glass transition temperature Tg
initiation
36. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
constitution
injection molding
configuration
eclipsed conformation/ cis - conformation
37. Covalent bonding of the polymer backbone and side groups
any carbon with double bonds or repeated substituents
primary bonding
branching
atactic
38. Relative configuration of adjecent asymmetric carbons
vulcanization
melt spinning
hopper
tacticity
39. An acid and an alcohol
most common condensation/step- growth polymerization occur between....
graft copolymers
quenching
side groups/ substituents
40. Molecule containing a highly reactive unpaired electron
weight average molecular weight Mw
free radical
High volume thermoplastics HVTP
additives
41. Number of repeat/structural units in a polymer chain
injection molding
functionality
degree of polymerization DPn
hopper
42. 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
barrel
branching
primary bonding
condensation/step- growth polymerization
43. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
eclipsed conformation/ cis - conformation
hopper
polyesters
tow
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
die
thermoplastics
glass transition temperature Tg
asymetric
45. Primary raw material for most polymers
plyacrylonitrile PAN
random copolymers
block copolymers
petroleum
46. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
poly- p- phenylene benzobisoxazole PBO
quenching
alternating copolymers
extruder
47. Broad category of polymers that includes polymers containing urethane linkages
propagation
tacticity
polyurethanes
barrel
48. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process
shot size
polymethylmethacrylate PMMA
blends
die
49. Simple polymeric material produced as pellets in large quantities
tow
constitution
mutual termination
High volume thermoplastics HVTP
50. 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
addition polymerization/chain growth/free- radical polymerization
polyesters
elastomers
melt spinning