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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. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
barrel
graft copolymers
configuration
petroleum
2. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
syndiotactic dyad
polymer backbone
viscose process
poly- p- phenylene benzobisoxazole PBO
3. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
random copolymers
polyamides
mutual termination
polyurethanes
4. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
any carbon with double bonds or repeated substituents
rayon
secondary bonding
random copolymers
5. Carbon atom capable of multiple configurations due to four different substituents
trans - conformation
asymetric
relative molecular mass RMM
staggered conformation
6. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
polyviyl chloride PVC
branching
atactic
side groups/ substituents
7. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
propagation
weight average molecular weight Mw
acrylic
screen pack
8. Softening agents
freeze line
weight average molecular weight Mw
functionality
plasticizers
9. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
mutual termination
most common condensation/step- growth polymerization occur between....
degree of polymerization DPn
extruder
10. Arrangement of the largest substituents where the substituets are offset by 120
polymers
staggered conformation
mutual termination
branching
11. 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
petroleum
staggered conformation
plasticizers
melt spinning
12. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
polyamides
functional groups
side groups/ substituents
number average molecular weight Mn
13. Porcess of breaking large organic hydrocarbons into smaller molecules
primary bonding
quenching
cracking
random copolymers
14. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
polypphenylene terephyhalamide PPTA
solution spinning
conformation
dyes
15. First step in the process of polymerization - during which a free radical is formed
relative molecular mass RMM
oligomers
quenching
initiation
16. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
acrylic
functionality
nylon
screen pack
17. 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
branching
blends
viscose process
shot size
18. 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
additives
screen pack
polyviyl chloride PVC
isotactic dan
19. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
polymer backbone
freeze line
polyurethanes
random copolymers
20. Relative configuration of adjecent asymmetric carbons
gauche conformation
injection molding
isotactic dan
tacticity
21. Two or more polymers mechanically mixed together but without covalent bonding between them
polymer backbone
gauche conformation
initiation
blends
22. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
isotactic dan
asymetric
polymer backbone
relative molecular mass RMM
23. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
copolymer
end groups
graft copolymers
die
24. Is not asymetric and cannot have multiple configurations
mutual termination
isotactic dan
degree of polymerization DPn
any carbon with double bonds or repeated substituents
25. 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
graft copolymers
relative molecular mass RMM
rayon
26. Primary raw material for most polymers
petroleum
homopolymer
free radical
blends
27. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)
blends
polyviyl chloride PVC
pigments
elastomers
28. Conformation that occurs when the largest substituent in a molecule are offset by 60
gauche conformation
shot size
injection molding
constitution
29. Coloring agents that do not dissolve into the polymer
polyviyl chloride PVC
pigments
fillers
elastomers
30. Last step in the polymerization process - which occurs when the free radical of a polymer chain joins the free radical on an end group
atactic
tow
additives
primary termination
31. 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
barrel
trans - conformation
nylon
extruder
32. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance
polypphenylene terephyhalamide PPTA
barrel
eclipsed conformation/ cis - conformation
acrylic
33. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
asymetric
syndiotactic dyad
functional groups
primary bonding
34. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
conformation
extruder
polyurethanes
polyviyl chloride PVC
35. Double bounded organic molecule used to begin addition polymerization
free radical
homopolymer
relative molecular mass RMM
vinyl monomer
36. 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
relative molecular mass RMM
solution spinning
thermosets
37. 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
branching
die
block copolymers
38. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
syndiotactic dyad
oligomers
plyacrylonitrile PAN
copolymer
39. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
screen pack
coloring agents
vulcanization
polyviyl chloride PVC
40. Additives whose primary purpose is to reduce the final cost of the product
isotactic dan
initiation
fillers
termination
41. One type of polymer that contains at least 85% of polyacrylonitrile PAN
configuration
step- growth/condensation polymerization
alternating copolymers
acrylic
42. Number of bonds a molecule has formed
plyacrylonitrile PAN
shot size
functionality
alternating copolymers
43. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
cracking
nylon
end groups
acrylic
44. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
blends
solution spinning
thermosets
extruder
45. An acid and an alcohol
fillers
most common condensation/step- growth polymerization occur between....
copolymer
screen pack
46. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
termination
eclipsed conformation/ cis - conformation
tow
High volume thermoplastics HVTP
47. 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
plasticizers
hopper
condensation/step- growth polymerization
homopolymer
48. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
alternating copolymers
polymethylmethacrylate PMMA
number average molecular weight Mn
hopper
49. Simple polymeric material produced as pellets in large quantities
High volume thermoplastics HVTP
poly- p- phenylene benzobisoxazole PBO
primary termination
tow
50. Atoms attached to the polymer backbone.
most common condensation/step- growth polymerization occur between....
free radical
side groups/ substituents
tow