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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. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
additives
oligomers
aramid
stabilizers
2. Coloring agents that do not dissolve into the polymer
monomers
petroleum
vulcanization
pigments
3. 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
thermoplastics
graft copolymers
die
quenching
4. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
nylon
side groups/ substituents
stabilizers
plyacrylonitrile PAN
5. Carbon atom capable of multiple configurations due to four different substituents
primary termination
asymetric
polyurethanes
propagation
6. An acid and an alcohol
most common condensation/step- growth polymerization occur between....
freeze line
asymetric
thermosets
7. 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
end groups
block copolymers
blends
primary bonding
8. Primary raw material for most polymers
polyesters
petroleum
viscose process
homopolymer
9. Polymer made up of two of more differenet monomers covalently bonded together
functional groups
copolymer
trans - conformation
mutual termination
10. Pigments or dyes that change the way light is absorbed or reflected by a polymer
coloring agents
injection molding
pigments
fillers
11. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
oligomers
polymethylmethacrylate PMMA
structural unit
graft copolymers
12. Number of repeat/structural units in a polymer chain
configuration
blends
gauche conformation
degree of polymerization DPn
13. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
spinneret
functional groups
vinyl monomer
monomers
14. 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
plyacrylonitrile PAN
melt spinning
barrel
configuration
15. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
primary bonding
relative molecular mass RMM
vulcanization
blends
16. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
gauche conformation
extruder
aramid
propagation
17. Part of the extrusion apparatus that contains a heated screw which is used to melt the polymer and the polymer forward into the next chamber
polyurethanes
stabilizers
barrel
polymethylmethacrylate PMMA
18. 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
vinyl monomer
relative molecular mass RMM
atactic
injection molding
19. 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
asymetric
quenching
glass transition temperature Tg
20. Porcess of breaking large organic hydrocarbons into smaller molecules
functional groups
polymer backbone
primary termination
cracking
21. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
termination
polypphenylene terephyhalamide PPTA
polymer backbone
tacticity
22. Simple polymeric material produced as pellets in large quantities
screen pack
polypphenylene terephyhalamide PPTA
High volume thermoplastics HVTP
polyviyl chloride PVC
23. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed
trans - conformation
extruder
thermoplastics
step- growth/condensation polymerization
24. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
viscose process
configuration
elastomers
atactic
25. Conformation in which the largest substituents are offset by 180
isotactic dan
initiation
mutual termination
trans - conformation
26. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber
blends
end groups
thermoplastics
spinneret
27. Covalent bonding of the polymer backbone and side groups
rayon
end groups
relative molecular mass RMM
primary bonding
28. Double bounded organic molecule used to begin addition polymerization
atactic
dyes
vinyl monomer
oligomers
29. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
addition polymerization/chain growth/free- radical polymerization
screen pack
relative molecular mass RMM
dyes
30. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
random copolymers
pigments
structural unit
plasticizers
31. Two or more polymers mechanically mixed together but without covalent bonding between them
random copolymers
blends
petroleum
step- growth/condensation polymerization
32. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
any carbon with double bonds or repeated substituents
constitution
initiation
atactic
33. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
vinyl monomer
nylon
termination
polymer backbone
34. Additives whose primary purpose is to reduce the final cost of the product
fillers
gauche conformation
monomers
vulcanization
35. One type of polymer that contains at least 85% of polyacrylonitrile PAN
trans - conformation
acrylic
mutual termination
secondary bonding
36. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
thermosets
High volume thermoplastics HVTP
primary bonding
tow
37. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
melt spinning
syndiotactic dyad
polyurethanes
spinneret
38. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
rayon
polyurethanes
viscose process
alternating copolymers
39. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals
secondary bonding
High volume thermoplastics HVTP
tacticity
polyesters
40. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
primary bonding
graft copolymers
tow
oligomers
41. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
propagation
eclipsed conformation/ cis - conformation
monomers
polyviyl chloride PVC
42. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
relative molecular mass RMM
stabilizers
functional groups
polyurethanes
43. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
homopolymer
atactic
freeze line
mutual termination
44. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
thermosets
elastomers
quenching
configuration
45. Relative configuration of adjecent asymmetric carbons
tacticity
coloring agents
blends
conformation
46. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
degree of polymerization DPn
eclipsed conformation/ cis - conformation
nylon
solution spinning
47. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property
quenching
aramid
additives
initiation
48. Covalently bonded chains of molecules with small monomer units repeated from end to end
termination
shot size
functional groups
polymers
49. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
blends
coloring agents
conformation
weight average molecular weight Mw
50. First step in the process of polymerization - during which a free radical is formed
initiation
atactic
hopper
structural unit