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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. Simple polymeric material produced as pellets in large quantities
extruder
High volume thermoplastics HVTP
blends
step- growth/condensation polymerization
2. Double bounded organic molecule used to begin addition polymerization
vinyl monomer
polyurethanes
die
side groups/ substituents
3. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
cracking
tow
staggered conformation
dyes
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
syndiotactic dyad
blends
spinneret
die
5. Polymers that contain amide (- N-) groups in the chain
polyamides
plasticizers
coloring agents
free radical
6. Molecule containing a highly reactive unpaired electron
free radical
plasticizers
rayon
extruder
7. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
condensation/step- growth polymerization
elastomers
graft copolymers
acrylic
8. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
secondary bonding
rayon
polyurethanes
oligomers
9. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
end groups
fillers
branching
aramid
10. 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
polymer backbone
number average molecular weight Mn
any carbon with double bonds or repeated substituents
vulcanization
11. Polymers with low melting poins due to the lack of covalent bonding between adjacent chains. such polymers can be repeatedly melted and re- formed
tow
thermoplastics
additives
melt spinning
12. Carbon atom capable of multiple configurations due to four different substituents
end groups
plasticizers
asymetric
quenching
13. 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
rayon
tow
constitution
14. Polymer that is made up a single repeat unit
addition polymerization/chain growth/free- radical polymerization
monomers
homopolymer
polyesters
15. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
glass transition temperature Tg
syndiotactic dyad
dyes
extruder
16. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
propagation
thermoplastics
petroleum
quenching
17. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
polyviyl chloride PVC
polyamides
eclipsed conformation/ cis - conformation
aramid
18. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber
spinneret
condensation/step- growth polymerization
primary bonding
fillers
19. An acid and an alcohol
plasticizers
gauche conformation
any carbon with double bonds or repeated substituents
most common condensation/step- growth polymerization occur between....
20. Last step in the polymerization process - which occurs when the free radical of a polymer chain joins the free radical on an end group
relative molecular mass RMM
thermoplastics
propagation
primary termination
21. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
constitution
plyacrylonitrile PAN
relative molecular mass RMM
polymer backbone
22. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
atactic
alternating copolymers
petroleum
nylon
23. Covalently bonded chains of molecules with small monomer units repeated from end to end
functionality
polymers
alternating copolymers
tacticity
24. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
trans - conformation
atactic
alternating copolymers
end groups
25. Smallest repeating unit in a polymer. aka repeat unit
constitution
structural unit
gauche conformation
homopolymer
26. Pigments or dyes that change the way light is absorbed or reflected by a polymer
freeze line
aramid
extruder
coloring agents
27. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
oligomers
block copolymers
screen pack
relative molecular mass RMM
28. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
primary bonding
cracking
constitution
atactic
29. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
configuration
isotactic dan
acrylic
end groups
30. 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
eclipsed conformation/ cis - conformation
mutual termination
polyesters
polyamides
31. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
additives
free radical
elastomers
nylon
32. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
acrylic
poly- p- phenylene benzobisoxazole PBO
extruder
polyesters
33. 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
solution spinning
polypphenylene terephyhalamide PPTA
die
additives
34. Polymer made up of two of more differenet monomers covalently bonded together
cracking
copolymer
relative molecular mass RMM
gauche conformation
35. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
vulcanization
syndiotactic dyad
plyacrylonitrile PAN
solution spinning
36. 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
random copolymers
monomers
branching
freeze line
37. Term used to represent the average molecular weight of a sample containing a wide range of polymer chain lengths. this term is used to avoid confusion between the number average and the weight molecular average weight
relative molecular mass RMM
coloring agents
termination
graft copolymers
38. 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
graft copolymers
asymetric
39. Low- molecular- weight building blocks repeated in the polymer chain
barrel
polymer backbone
polypphenylene terephyhalamide PPTA
monomers
40. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
extruder
tacticity
plasticizers
oligomers
41. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
polymethylmethacrylate PMMA
freeze line
vulcanization
elastomers
42. First step in the process of polymerization - during which a free radical is formed
pigments
initiation
rayon
functionality
43. Relative configuration of adjecent asymmetric carbons
homopolymer
plasticizers
free radical
tacticity
44. Kevlar - Twaron - high tensile strength - lightweight - susceptible to uv degradation - nonconductive - bullet- resistant armor - sports equipment - fire resistance
relative molecular mass RMM
number average molecular weight Mn
asymetric
polypphenylene terephyhalamide PPTA
45. Polymers comprised of two or more different monomers - which attach to the polymer chain in no particular order of pattern
random copolymers
stabilizers
mutual termination
tow
46. Primary raw material for most polymers
eclipsed conformation/ cis - conformation
structural unit
petroleum
thermoplastics
47. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals
injection molding
end groups
atactic
secondary bonding
48. Softening agents
dyes
secondary bonding
step- growth/condensation polymerization
plasticizers
49. Coloring agents that do not dissolve into the polymer
freeze line
homopolymer
blends
pigments
50. One method of expressing the molecular weight of sample of polymers with averaging based on weight; this method is more useful when large molecules in the sample dominate the behavior
viscose process
weight average molecular weight Mw
initiation
thermosets