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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. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
polyviyl chloride PVC
aramid
screen pack
functional groups
2. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
random copolymers
viscose process
tacticity
dyes
3. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
tacticity
conformation
polyviyl chloride PVC
polyurethanes
4. 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
die
primary bonding
functionality
polypphenylene terephyhalamide PPTA
5. Porcess of breaking large organic hydrocarbons into smaller molecules
graft copolymers
cracking
initiation
polymethylmethacrylate PMMA
6. Polymer made up of two of more differenet monomers covalently bonded together
shot size
polymer backbone
screen pack
copolymer
7. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
copolymer
propagation
block copolymers
relative molecular mass RMM
8. 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
acrylic
thermoplastics
solution spinning
die
9. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
hopper
tow
glass transition temperature Tg
relative molecular mass RMM
10. 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
polymethylmethacrylate PMMA
relative molecular mass RMM
hopper
11. Type of plymer processing similar to extrusion but can be used to develop parts with complex shapes rapidly
polymethylmethacrylate PMMA
rayon
injection molding
copolymer
12. Relative configuration of adjecent asymmetric carbons
polyurethanes
tacticity
polyamides
acrylic
13. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed
thermoplastics
thermosets
quenching
asymetric
14. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
graft copolymers
solution spinning
secondary bonding
functionality
15. Molecule containing a highly reactive unpaired electron
alternating copolymers
cracking
secondary bonding
free radical
16. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
barrel
polymers
oligomers
coloring agents
17. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
polymer backbone
primary termination
stabilizers
addition polymerization/chain growth/free- radical polymerization
18. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
pigments
end groups
hopper
nylon
19. Covalently bonded chains of molecules with small monomer units repeated from end to end
plasticizers
polymers
step- growth/condensation polymerization
melt spinning
20. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
end groups
aramid
polymer backbone
block copolymers
21. Two or more polymers mechanically mixed together but without covalent bonding between them
isotactic dan
blends
spinneret
vinyl monomer
22. Polymers that contain amide (- N-) groups in the chain
any carbon with double bonds or repeated substituents
polyamides
atactic
monomers
23. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
blends
random copolymers
polymers
structural unit
24. Additives whose primary purpose is to reduce the final cost of the product
vulcanization
thermosets
propagation
fillers
25. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
cracking
melt spinning
thermosets
viscose process
26. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
tacticity
atactic
aramid
die
27. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process
functionality
shot size
polymethylmethacrylate PMMA
die
28. 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
configuration
staggered conformation
step- growth/condensation polymerization
number average molecular weight Mn
29. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
branching
copolymer
polyviyl chloride PVC
end groups
30. Number of bonds a molecule has formed
functionality
side groups/ substituents
mutual termination
gauche conformation
31. Softening agents
injection molding
plasticizers
isotactic dan
spinneret
32. Simple polymeric material produced as pellets in large quantities
asymetric
High volume thermoplastics HVTP
additives
rayon
33. 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
cracking
atactic
coloring agents
condensation/step- growth polymerization
34. 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
end groups
copolymer
polyesters
gauche conformation
35. 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
primary bonding
dyes
step- growth/condensation polymerization
die
36. 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
plyacrylonitrile PAN
constitution
shot size
37. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
vulcanization
stabilizers
eclipsed conformation/ cis - conformation
primary bonding
38. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
end groups
poly- p- phenylene benzobisoxazole PBO
free radical
constitution
39. 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
primary termination
additives
homopolymer
40. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
conformation
screen pack
secondary bonding
most common condensation/step- growth polymerization occur between....
41. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
random copolymers
plasticizers
aramid
plasticizers
42. Carbon atom capable of multiple configurations due to four different substituents
nylon
vinyl monomer
asymetric
atactic
43. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
spinneret
fillers
polymethylmethacrylate PMMA
barrel
44. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)
vulcanization
constitution
elastomers
extruder
45. Covalent bonding of the polymer backbone and side groups
polyurethanes
shot size
condensation/step- growth polymerization
primary bonding
46. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
shot size
die
stabilizers
hopper
47. Is not asymetric and cannot have multiple configurations
any carbon with double bonds or repeated substituents
freeze line
primary termination
glass transition temperature Tg
48. Conformation in which the largest substituents are offset by 180
addition polymerization/chain growth/free- radical polymerization
additives
trans - conformation
polypphenylene terephyhalamide PPTA
49. Primary raw material for most polymers
random copolymers
degree of polymerization DPn
gauche conformation
petroleum
50. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
side groups/ substituents
shot size
primary bonding
poly- p- phenylene benzobisoxazole PBO