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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. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
extruder
mutual termination
vulcanization
plasticizers
2. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
hopper
poly- p- phenylene benzobisoxazole PBO
functional groups
number average molecular weight Mn
3. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
plyacrylonitrile PAN
spinneret
extruder
polypphenylene terephyhalamide PPTA
4. 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
polymethylmethacrylate PMMA
polymer backbone
configuration
step- growth/condensation polymerization
5. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
pigments
relative molecular mass RMM
configuration
propagation
6. Softening agents
functional groups
dyes
aramid
plasticizers
7. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
freeze line
gauche conformation
extruder
quenching
8. Porcess of breaking large organic hydrocarbons into smaller molecules
cracking
plasticizers
polyamides
screen pack
9. 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
propagation
staggered conformation
solution spinning
copolymer
10. 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
trans - conformation
melt spinning
rayon
primary bonding
11. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
isotactic dan
termination
hopper
nylon
12. Polymers that contain amide (- N-) groups in the chain
polyamides
initiation
end groups
primary bonding
13. Atoms attached to the polymer backbone.
side groups/ substituents
atactic
step- growth/condensation polymerization
tacticity
14. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
plyacrylonitrile PAN
thermosets
injection molding
petroleum
15. 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
mutual termination
polymers
isotactic dan
most common condensation/step- growth polymerization occur between....
16. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
random copolymers
tow
termination
atactic
17. Low- molecular- weight building blocks repeated in the polymer chain
monomers
copolymer
extruder
tacticity
18. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
vulcanization
poly- p- phenylene benzobisoxazole PBO
initiation
stabilizers
19. Covalent bonding of the polymer backbone and side groups
primary bonding
end groups
cracking
termination
20. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
configuration
oligomers
High volume thermoplastics HVTP
mutual termination
21. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
any carbon with double bonds or repeated substituents
injection molding
branching
atactic
22. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
stabilizers
constitution
atactic
monomers
23. Two or more polymers mechanically mixed together but without covalent bonding between them
High volume thermoplastics HVTP
plyacrylonitrile PAN
coloring agents
blends
24. Number of bonds a molecule has formed
end groups
step- growth/condensation polymerization
functionality
melt spinning
25. One type of polymer that contains at least 85% of polyacrylonitrile PAN
random copolymers
hopper
acrylic
side groups/ substituents
26. Number of repeat/structural units in a polymer chain
plasticizers
vulcanization
degree of polymerization DPn
homopolymer
27. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
eclipsed conformation/ cis - conformation
quenching
nylon
branching
28. Double bounded organic molecule used to begin addition polymerization
vinyl monomer
plyacrylonitrile PAN
condensation/step- growth polymerization
plasticizers
29. Conformation that occurs when the largest substituent in a molecule are offset by 60
gauche conformation
functionality
viscose process
mutual termination
30. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
hopper
aramid
nylon
trans - conformation
31. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
copolymer
rayon
eclipsed conformation/ cis - conformation
poly- p- phenylene benzobisoxazole PBO
32. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
random copolymers
free radical
acrylic
syndiotactic dyad
33. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
acrylic
poly- p- phenylene benzobisoxazole PBO
structural unit
coloring agents
34. Relative configuration of adjecent asymmetric carbons
vinyl monomer
monomers
end groups
tacticity
35. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
end groups
additives
viscose process
polymers
36. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
free radical
propagation
stabilizers
staggered conformation
37. Pigments or dyes that change the way light is absorbed or reflected by a polymer
coloring agents
isotactic dan
viscose process
poly- p- phenylene benzobisoxazole PBO
38. Form of the molecular weight of a sample of polymer chains determined by dividing the mass of the specimen by total number of mols present; always less than weight average molecular weight; all molecules regardless of size correlate well with Mn
weight average molecular weight Mw
plasticizers
number average molecular weight Mn
eclipsed conformation/ cis - conformation
39. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
poly- p- phenylene benzobisoxazole PBO
rayon
blends
polymethylmethacrylate PMMA
40. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
addition polymerization/chain growth/free- radical polymerization
primary bonding
polyviyl chloride PVC
random copolymers
41. Last step in the polymerization process - which occurs when the free radical of a polymer chain joins the free radical on an end group
polymers
syndiotactic dyad
primary termination
alternating copolymers
42. Arrangement of the largest substituents where the substituets are offset by 120
polymers
staggered conformation
solution spinning
die
43. 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
die
glass transition temperature Tg
polyviyl chloride PVC
eclipsed conformation/ cis - conformation
44. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
High volume thermoplastics HVTP
conformation
atactic
step- growth/condensation polymerization
45. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
syndiotactic dyad
polyamides
barrel
cracking
46. Simple polymeric material produced as pellets in large quantities
High volume thermoplastics HVTP
stabilizers
elastomers
branching
47. 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
freeze line
weight average molecular weight Mw
die
extruder
48. Carbon atom capable of multiple configurations due to four different substituents
polyesters
asymetric
aramid
screen pack
49. Covalently bonded chains of molecules with small monomer units repeated from end to end
injection molding
graft copolymers
polymers
poly- p- phenylene benzobisoxazole PBO
50. 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
stabilizers
block copolymers
poly- p- phenylene benzobisoxazole PBO
solution spinning