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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. Conformation in which the largest substituents are offset by 180
trans - conformation
rayon
additives
primary termination
2. Polymer that is made up a single repeat unit
injection molding
any carbon with double bonds or repeated substituents
homopolymer
shot size
3. Covalent bonding of the polymer backbone and side groups
trans - conformation
coloring agents
primary bonding
polyurethanes
4. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
petroleum
hopper
tow
quenching
5. 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
polyamides
die
dyes
extruder
6. One type of polymer that contains at least 85% of polyacrylonitrile PAN
step- growth/condensation polymerization
acrylic
graft copolymers
weight average molecular weight Mw
7. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
trans - conformation
screen pack
thermosets
step- growth/condensation polymerization
8. Terminating a condensation/step- growth polymerization reaction by adding a material with only one functional group
polymers
polymethylmethacrylate PMMA
quenching
any carbon with double bonds or repeated substituents
9. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
syndiotactic dyad
functionality
poly- p- phenylene benzobisoxazole PBO
termination
10. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
blends
conformation
tow
propagation
11. 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
staggered conformation
degree of polymerization DPn
melt spinning
12. 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
most common condensation/step- growth polymerization occur between....
block copolymers
additives
graft copolymers
13. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
addition polymerization/chain growth/free- radical polymerization
asymetric
polyviyl chloride PVC
end groups
14. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
random copolymers
screen pack
step- growth/condensation polymerization
free radical
15. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
termination
acrylic
syndiotactic dyad
homopolymer
16. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
copolymer
acrylic
end groups
monomers
17. Smallest repeating unit in a polymer. aka repeat unit
termination
fillers
structural unit
plyacrylonitrile PAN
18. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
dyes
polymer backbone
cracking
termination
19. 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
coloring agents
plyacrylonitrile PAN
shot size
plasticizers
20. Type of plymer processing similar to extrusion but can be used to develop parts with complex shapes rapidly
injection molding
polyviyl chloride PVC
barrel
melt spinning
21. 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
constitution
condensation/step- growth polymerization
branching
22. Arrangement of the largest substituents where the substituets are offset by 120
staggered conformation
melt spinning
acrylic
blends
23. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
barrel
polymethylmethacrylate PMMA
quenching
extruder
24. First step in the process of polymerization - during which a free radical is formed
initiation
isotactic dan
polymer backbone
plasticizers
25. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
poly- p- phenylene benzobisoxazole PBO
condensation/step- growth polymerization
nylon
branching
26. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
aramid
rayon
polyviyl chloride PVC
homopolymer
27. Broad category of polymers that includes polymers containing urethane linkages
termination
quenching
polyurethanes
stabilizers
28. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
additives
hopper
graft copolymers
polymer backbone
29. 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
pigments
barrel
quenching
30. 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
asymetric
condensation/step- growth polymerization
staggered conformation
melt spinning
31. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance
injection molding
polypphenylene terephyhalamide PPTA
step- growth/condensation polymerization
vinyl monomer
32. An acid and an alcohol
most common condensation/step- growth polymerization occur between....
fillers
configuration
coloring agents
33. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
additives
vulcanization
weight average molecular weight Mw
polypphenylene terephyhalamide PPTA
34. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
polyviyl chloride PVC
pigments
screen pack
mutual termination
35. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
monomers
poly- p- phenylene benzobisoxazole PBO
High volume thermoplastics HVTP
side groups/ substituents
36. Number of bonds a molecule has formed
monomers
functionality
polyesters
primary termination
37. Atoms attached to the polymer backbone.
thermoplastics
rayon
side groups/ substituents
tow
38. Additives whose primary purpose is to reduce the final cost of the product
fillers
isotactic dan
petroleum
graft copolymers
39. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
acrylic
freeze line
polyurethanes
eclipsed conformation/ cis - conformation
40. Pigments or dyes that change the way light is absorbed or reflected by a polymer
constitution
coloring agents
glass transition temperature Tg
any carbon with double bonds or repeated substituents
41. Primary raw material for most polymers
elastomers
number average molecular weight Mn
petroleum
rayon
42. 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
relative molecular mass RMM
freeze line
step- growth/condensation polymerization
syndiotactic dyad
43. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
termination
random copolymers
pigments
condensation/step- growth polymerization
44. Porcess of breaking large organic hydrocarbons into smaller molecules
aramid
cracking
spinneret
vulcanization
45. Simple polymeric material produced as pellets in large quantities
cracking
High volume thermoplastics HVTP
vulcanization
glass transition temperature Tg
46. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed
plyacrylonitrile PAN
propagation
thermoplastics
quenching
47. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
dyes
mutual termination
plyacrylonitrile PAN
freeze line
48. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
end groups
elastomers
screen pack
conformation
49. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
functional groups
alternating copolymers
tow
polymer backbone
50. Double bounded organic molecule used to begin addition polymerization
cracking
nylon
extruder
vinyl monomer