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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. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
free radical
plyacrylonitrile PAN
hopper
fillers
2. Terminating a condensation/step- growth polymerization reaction by adding a material with only one functional group
free radical
constitution
quenching
any carbon with double bonds or repeated substituents
3. Arrangement of the largest substituents where the substituets are offset by 120
conformation
elastomers
propagation
staggered conformation
4. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
relative molecular mass RMM
solution spinning
vinyl monomer
alternating copolymers
5. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process
plasticizers
injection molding
shot size
relative molecular mass RMM
6. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
dyes
pigments
polymer backbone
graft copolymers
7. 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
polyesters
aramid
plasticizers
hopper
8. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
termination
propagation
block copolymers
quenching
9. Primary raw material for most polymers
die
polypphenylene terephyhalamide PPTA
petroleum
polymer backbone
10. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
blends
configuration
free radical
degree of polymerization DPn
11. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
shot size
alternating copolymers
tow
conformation
12. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
constitution
trans - conformation
asymetric
pigments
13. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
polyviyl chloride PVC
quenching
shot size
polymethylmethacrylate PMMA
14. Polymer made up of two of more differenet monomers covalently bonded together
blends
plasticizers
rayon
copolymer
15. One type of polymer that contains at least 85% of polyacrylonitrile PAN
termination
tow
primary termination
acrylic
16. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
propagation
functionality
tow
most common condensation/step- growth polymerization occur between....
17. Conformation that occurs when the largest substituent in a molecule are offset by 60
gauche conformation
screen pack
quenching
die
18. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals
secondary bonding
polymers
extruder
structural unit
19. 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
nylon
spinneret
mutual termination
aramid
20. Porcess of breaking large organic hydrocarbons into smaller molecules
extruder
thermoplastics
tacticity
cracking
21. Double bounded organic molecule used to begin addition polymerization
vinyl monomer
initiation
polypphenylene terephyhalamide PPTA
condensation/step- growth polymerization
22. 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
end groups
number average molecular weight Mn
screen pack
pigments
23. 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
most common condensation/step- growth polymerization occur between....
spinneret
glass transition temperature Tg
conformation
24. 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
melt spinning
polymethylmethacrylate PMMA
extruder
structural unit
25. Relative configuration of adjecent asymmetric carbons
primary termination
extruder
eclipsed conformation/ cis - conformation
tacticity
26. 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
polypphenylene terephyhalamide PPTA
secondary bonding
polyviyl chloride PVC
27. 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
shot size
thermoplastics
polyurethanes
28. Additives whose primary purpose is to reduce the final cost of the product
primary termination
fillers
vulcanization
additives
29. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
cracking
graft copolymers
step- growth/condensation polymerization
addition polymerization/chain growth/free- radical polymerization
30. An acid and an alcohol
barrel
most common condensation/step- growth polymerization occur between....
fillers
vinyl monomer
31. Conformation in which the largest substituents are offset by 180
weight average molecular weight Mw
secondary bonding
trans - conformation
any carbon with double bonds or repeated substituents
32. Softening agents
any carbon with double bonds or repeated substituents
High volume thermoplastics HVTP
plasticizers
addition polymerization/chain growth/free- radical polymerization
33. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
initiation
configuration
dyes
nylon
34. Molecule containing a highly reactive unpaired electron
free radical
vulcanization
end groups
step- growth/condensation polymerization
35. Simple polymeric material produced as pellets in large quantities
functionality
spinneret
High volume thermoplastics HVTP
stabilizers
36. 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
polypphenylene terephyhalamide PPTA
isotactic dan
spinneret
37. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)
cracking
elastomers
alternating copolymers
addition polymerization/chain growth/free- radical polymerization
38. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
relative molecular mass RMM
viscose process
vulcanization
homopolymer
39. Coloring agents that do not dissolve into the polymer
pigments
quenching
viscose process
tacticity
40. Covalent bonding of the polymer backbone and side groups
primary bonding
shot size
configuration
nylon
41. Is not asymetric and cannot have multiple configurations
syndiotactic dyad
random copolymers
most common condensation/step- growth polymerization occur between....
any carbon with double bonds or repeated substituents
42. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
degree of polymerization DPn
aramid
polymethylmethacrylate PMMA
vulcanization
43. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
mutual termination
vinyl monomer
extruder
solution spinning
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
petroleum
solution spinning
any carbon with double bonds or repeated substituents
thermoplastics
45. Two or more polymers mechanically mixed together but without covalent bonding between them
monomers
block copolymers
nylon
blends
46. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
polymethylmethacrylate PMMA
propagation
additives
eclipsed conformation/ cis - conformation
47. 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
poly- p- phenylene benzobisoxazole PBO
barrel
spinneret
thermoplastics
48. Atoms attached to the polymer backbone.
degree of polymerization DPn
propagation
step- growth/condensation polymerization
side groups/ substituents
49. 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
condensation/step- growth polymerization
structural unit
polymers
weight average molecular weight Mw
50. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
rayon
hopper
most common condensation/step- growth polymerization occur between....
spinneret