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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. Covalent bonding of the polymer backbone and side groups
primary bonding
functional groups
copolymer
plasticizers
2. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
copolymer
rayon
polyviyl chloride PVC
relative molecular mass RMM
3. 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
staggered conformation
block copolymers
nylon
solution spinning
4. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
thermosets
polyurethanes
polymer backbone
functional groups
5. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
polypphenylene terephyhalamide PPTA
nylon
isotactic dan
step- growth/condensation polymerization
6. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
barrel
tow
tacticity
isotactic dan
7. 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
polyamides
plasticizers
configuration
step- growth/condensation polymerization
8. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
extruder
mutual termination
polyesters
plasticizers
9. Specified weight of a polymer that is injected into the mold at the end of the barrel during the injection molding process
spinneret
eclipsed conformation/ cis - conformation
blends
shot size
10. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
branching
poly- p- phenylene benzobisoxazole PBO
secondary bonding
hopper
11. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
end groups
monomers
nylon
oligomers
12. Arrangement of the largest substituents where the substituets are offset by 120
isotactic dan
plasticizers
staggered conformation
conformation
13. 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
weight average molecular weight Mw
plasticizers
step- growth/condensation polymerization
polyesters
14. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
injection molding
constitution
vulcanization
most common condensation/step- growth polymerization occur between....
15. Conformation in which the largest substituents are offset by 180
trans - conformation
secondary bonding
gauche conformation
any carbon with double bonds or repeated substituents
16. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
thermosets
polymer backbone
alternating copolymers
barrel
17. Double bounded organic molecule used to begin addition polymerization
vinyl monomer
functionality
primary termination
functional groups
18. 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
petroleum
polyviyl chloride PVC
plasticizers
19. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
alternating copolymers
addition polymerization/chain growth/free- radical polymerization
initiation
configuration
20. Porcess of breaking large organic hydrocarbons into smaller molecules
additives
die
primary bonding
cracking
21. Atoms attached to the polymer backbone.
side groups/ substituents
step- growth/condensation polymerization
mutual termination
melt spinning
22. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
die
weight average molecular weight Mw
random copolymers
blends
23. First step in the process of polymerization - during which a free radical is formed
hopper
functionality
initiation
viscose process
24. Covalently bonded chains of molecules with small monomer units repeated from end to end
any carbon with double bonds or repeated substituents
number average molecular weight Mn
graft copolymers
polymers
25. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
acrylic
end groups
polymethylmethacrylate PMMA
screen pack
26. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
secondary bonding
conformation
additives
polyurethanes
27. 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
primary termination
mutual termination
viscose process
spinneret
28. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
monomers
relative molecular mass RMM
homopolymer
aramid
29. Polymer made up of two of more differenet monomers covalently bonded together
copolymer
blends
weight average molecular weight Mw
plasticizers
30. Low- molecular- weight building blocks repeated in the polymer chain
High volume thermoplastics HVTP
monomers
coloring agents
stabilizers
31. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
polyurethanes
termination
stabilizers
most common condensation/step- growth polymerization occur between....
32. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
cracking
tow
termination
solution spinning
33. An acid and an alcohol
viscose process
most common condensation/step- growth polymerization occur between....
random copolymers
polypphenylene terephyhalamide PPTA
34. Last step in the polymerization process - which occurs when the free radical of a polymer chain joins the free radical on an end group
primary termination
monomers
polypphenylene terephyhalamide PPTA
stabilizers
35. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
condensation/step- growth polymerization
addition polymerization/chain growth/free- radical polymerization
polymethylmethacrylate PMMA
primary bonding
36. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
block copolymers
secondary bonding
weight average molecular weight Mw
polymethylmethacrylate PMMA
37. 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
melt spinning
vinyl monomer
primary termination
block copolymers
38. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals
secondary bonding
High volume thermoplastics HVTP
termination
cracking
39. 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
spinneret
die
functionality
constitution
40. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
rayon
stabilizers
vinyl monomer
mutual termination
41. Is not asymetric and cannot have multiple configurations
cracking
functionality
any carbon with double bonds or repeated substituents
polyviyl chloride PVC
42. 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
stabilizers
dyes
aramid
polyesters
43. Pigments or dyes that change the way light is absorbed or reflected by a polymer
coloring agents
dyes
elastomers
polymer backbone
44. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property
additives
functionality
asymetric
tow
45. Coloring agents that do not dissolve into the polymer
injection molding
pigments
polymers
initiation
46. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
dyes
cracking
primary bonding
atactic
47. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance
branching
primary termination
polypphenylene terephyhalamide PPTA
random copolymers
48. 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
tacticity
melt spinning
functionality
relative molecular mass RMM
49. Polymer that is made up a single repeat unit
quenching
additives
polypphenylene terephyhalamide PPTA
homopolymer
50. Conformation that occurs when the largest substituent in a molecule are offset by 60
asymetric
acrylic
gauche conformation
functionality