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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. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
eclipsed conformation/ cis - conformation
spinneret
constitution
conformation
2. 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
injection molding
block copolymers
polyamides
plasticizers
3. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
block copolymers
nylon
cracking
polymethylmethacrylate PMMA
4. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
plasticizers
stabilizers
acrylic
constitution
5. Polymer made up of two of more differenet monomers covalently bonded together
tacticity
copolymer
viscose process
hopper
6. Relative configuration of adjecent asymmetric carbons
tacticity
functionality
plyacrylonitrile PAN
spinneret
7. 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
block copolymers
polyamides
functionality
8. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
dyes
thermosets
poly- p- phenylene benzobisoxazole PBO
polymethylmethacrylate PMMA
9. One type of polymer that contains at least 85% of polyacrylonitrile PAN
polymethylmethacrylate PMMA
acrylic
monomers
termination
10. Primary raw material for most polymers
viscose process
petroleum
nylon
rayon
11. 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
polyviyl chloride PVC
number average molecular weight Mn
tacticity
extruder
12. 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
side groups/ substituents
primary termination
polymers
13. Polymers that contain amide (- N-) groups in the chain
polyamides
viscose process
stabilizers
solution spinning
14. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
thermosets
end groups
addition polymerization/chain growth/free- radical polymerization
condensation/step- growth polymerization
15. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
primary bonding
propagation
functionality
solution spinning
16. An acid and an alcohol
weight average molecular weight Mw
most common condensation/step- growth polymerization occur between....
shot size
die
17. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
screen pack
alternating copolymers
High volume thermoplastics HVTP
asymetric
18. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
hopper
quenching
most common condensation/step- growth polymerization occur between....
coloring agents
19. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
secondary bonding
blends
solution spinning
end groups
20. Covalently bonded atoms which are usualy carbon - that comprise the center of the polymer chain.
polymer backbone
isotactic dan
spinneret
coloring agents
21. Covalent bonding of the polymer backbone and side groups
stabilizers
primary bonding
cracking
die
22. 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
end groups
relative molecular mass RMM
homopolymer
condensation/step- growth polymerization
23. Porcess of breaking large organic hydrocarbons into smaller molecules
stabilizers
cracking
addition polymerization/chain growth/free- radical polymerization
acrylic
24. Two or more polymers mechanically mixed together but without covalent bonding between them
blends
homopolymer
fillers
extruder
25. Simple polymeric material produced as pellets in large quantities
High volume thermoplastics HVTP
mutual termination
polyviyl chloride PVC
weight average molecular weight Mw
26. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
viscose process
spinneret
alternating copolymers
asymetric
27. Softening agents
plasticizers
graft copolymers
High volume thermoplastics HVTP
thermoplastics
28. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
melt spinning
atactic
polyviyl chloride PVC
High volume thermoplastics HVTP
29. Low- molecular- weight building blocks repeated in the polymer chain
vulcanization
conformation
monomers
copolymer
30. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
mutual termination
atactic
primary termination
random copolymers
31. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
polymethylmethacrylate PMMA
graft copolymers
plasticizers
number average molecular weight Mn
32. Carbon atom capable of multiple configurations due to four different substituents
random copolymers
staggered conformation
spinneret
asymetric
33. Type of plymer processing similar to extrusion but can be used to develop parts with complex shapes rapidly
primary termination
screen pack
injection molding
quenching
34. Broad category of polymers that includes polymers containing urethane linkages
staggered conformation
polyurethanes
plyacrylonitrile PAN
configuration
35. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
quenching
dyes
blends
freeze line
36. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
dyes
elastomers
monomers
thermosets
37. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
free radical
plyacrylonitrile PAN
constitution
degree of polymerization DPn
38. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
functional groups
polypphenylene terephyhalamide PPTA
copolymer
number average molecular weight Mn
39. 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
copolymer
staggered conformation
random copolymers
step- growth/condensation polymerization
40. Number of repeat/structural units in a polymer chain
hopper
copolymer
degree of polymerization DPn
plyacrylonitrile PAN
41. 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
branching
polyesters
pigments
polyamides
42. Coloring agents that do not dissolve into the polymer
initiation
injection molding
nylon
pigments
43. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
plyacrylonitrile PAN
constitution
cracking
gauche conformation
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
polypphenylene terephyhalamide PPTA
additives
configuration
extruder
45. 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
propagation
side groups/ substituents
polymers
branching
46. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
functionality
poly- p- phenylene benzobisoxazole PBO
polymer backbone
gauche conformation
47. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
conformation
plasticizers
polymers
pigments
48. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
atactic
monomers
propagation
coloring agents
49. 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
trans - conformation
solution spinning
block copolymers
50. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
polypphenylene terephyhalamide PPTA
aramid
vulcanization
polymethylmethacrylate PMMA