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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. 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
plasticizers
solution spinning
staggered conformation
asymetric
2. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
step- growth/condensation polymerization
isotactic dan
random copolymers
graft copolymers
3. Number of bonds a molecule has formed
hopper
tow
branching
functionality
4. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
blends
copolymer
viscose process
freeze line
5. Relative configuration of adjecent asymmetric carbons
tacticity
dyes
tow
polyviyl chloride PVC
6. Simple polymeric material produced as pellets in large quantities
thermosets
mutual termination
High volume thermoplastics HVTP
degree of polymerization DPn
7. Number of repeat/structural units in a polymer chain
configuration
block copolymers
degree of polymerization DPn
shot size
8. 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
extruder
block copolymers
hopper
eclipsed conformation/ cis - conformation
9. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
termination
propagation
vinyl monomer
secondary bonding
10. Polymer made up of two of more differenet monomers covalently bonded together
die
copolymer
monomers
polypphenylene terephyhalamide PPTA
11. 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
vulcanization
alternating copolymers
hopper
condensation/step- growth polymerization
12. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
High volume thermoplastics HVTP
polymer backbone
gauche conformation
step- growth/condensation polymerization
13. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process
shot size
termination
polyviyl chloride PVC
coloring agents
14. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
free radical
degree of polymerization DPn
nylon
random copolymers
15. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
eclipsed conformation/ cis - conformation
asymetric
screen pack
coloring agents
16. Coloring agents that do not dissolve into the polymer
any carbon with double bonds or repeated substituents
pigments
poly- p- phenylene benzobisoxazole PBO
initiation
17. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
aramid
condensation/step- growth polymerization
oligomers
branching
18. Molecule containing a highly reactive unpaired electron
functional groups
polyesters
free radical
cracking
19. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
syndiotactic dyad
blends
copolymer
viscose process
20. Double bounded organic molecule used to begin addition polymerization
injection molding
vinyl monomer
degree of polymerization DPn
propagation
21. Primary raw material for most polymers
functionality
functional groups
die
petroleum
22. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
barrel
polymer backbone
extruder
coloring agents
23. 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
relative molecular mass RMM
vinyl monomer
stabilizers
screen pack
24. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
functional groups
monomers
end groups
polymers
25. 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
weight average molecular weight Mw
side groups/ substituents
relative molecular mass RMM
additives
26. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
secondary bonding
polyurethanes
dyes
weight average molecular weight Mw
27. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
copolymer
staggered conformation
oligomers
eclipsed conformation/ cis - conformation
28. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
primary termination
termination
plyacrylonitrile PAN
injection molding
29. Additives that cause swelling - which allows the polymer chains to slide past one another more easily - making the polymer softer and more pliable. also used to decrease the viscosity of cement paste to make it easier to flow
nylon
plasticizers
step- growth/condensation polymerization
thermoplastics
30. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
polyurethanes
polymers
addition polymerization/chain growth/free- radical polymerization
tacticity
31. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
constitution
solution spinning
rayon
degree of polymerization DPn
32. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
additives
polypphenylene terephyhalamide PPTA
functional groups
viscose process
33. Arrangement of the largest substituents where the substituets are offset by 120
screen pack
stabilizers
plasticizers
staggered conformation
34. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
conformation
die
injection molding
monomers
35. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
glass transition temperature Tg
plasticizers
random copolymers
propagation
36. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
poly- p- phenylene benzobisoxazole PBO
thermoplastics
injection molding
petroleum
37. Broad category of polymers that includes polymers containing urethane linkages
polyurethanes
addition polymerization/chain growth/free- radical polymerization
High volume thermoplastics HVTP
dyes
38. Polymer that is made up a single repeat unit
tacticity
plasticizers
trans - conformation
homopolymer
39. 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
atactic
petroleum
polyesters
plyacrylonitrile PAN
40. An acid and an alcohol
most common condensation/step- growth polymerization occur between....
monomers
constitution
graft copolymers
41. Carbon atom capable of multiple configurations due to four different substituents
asymetric
elastomers
any carbon with double bonds or repeated substituents
polymers
42. 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
step- growth/condensation polymerization
aramid
thermosets
cracking
43. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
vulcanization
configuration
functional groups
any carbon with double bonds or repeated substituents
44. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed
injection molding
thermosets
thermoplastics
aramid
45. Covalently bonded chains of molecules with small monomer units repeated from end to end
rayon
isotactic dan
polymers
asymetric
46. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
hopper
addition polymerization/chain growth/free- radical polymerization
viscose process
spinneret
47. 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
graft copolymers
atactic
isotactic dan
poly- p- phenylene benzobisoxazole PBO
48. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
graft copolymers
petroleum
thermosets
initiation
49. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
number average molecular weight Mn
isotactic dan
vulcanization
thermoplastics
50. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
hopper
polymethylmethacrylate PMMA
thermosets
polypphenylene terephyhalamide PPTA