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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. Smallest repeating unit in a polymer. aka repeat unit
staggered conformation
plasticizers
structural unit
polymers
2. 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
free radical
block copolymers
fillers
mutual termination
3. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
primary bonding
extruder
configuration
pigments
4. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
thermosets
mutual termination
oligomers
primary bonding
5. Additives whose primary purpose is to reduce the final cost of the product
end groups
plasticizers
fillers
blends
6. Double bounded organic molecule used to begin addition polymerization
termination
vinyl monomer
hopper
homopolymer
7. One type of polymer that contains at least 85% of polyacrylonitrile PAN
configuration
alternating copolymers
eclipsed conformation/ cis - conformation
acrylic
8. Low- molecular- weight building blocks repeated in the polymer chain
secondary bonding
eclipsed conformation/ cis - conformation
monomers
vinyl monomer
9. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
plasticizers
propagation
polypphenylene terephyhalamide PPTA
vulcanization
10. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
blends
structural unit
aramid
most common condensation/step- growth polymerization occur between....
11. Broad category of polymers that includes polymers containing urethane linkages
polyurethanes
tacticity
thermosets
configuration
12. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
cracking
tow
staggered conformation
eclipsed conformation/ cis - conformation
13. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
primary termination
solution spinning
extruder
degree of polymerization DPn
14. Polymer made up of two of more differenet monomers covalently bonded together
random copolymers
copolymer
polymers
gauche conformation
15. 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
polyamides
branching
mutual termination
isotactic dan
16. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
rayon
polyviyl chloride PVC
screen pack
polyurethanes
17. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
viscose process
asymetric
spinneret
polyviyl chloride PVC
18. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals
configuration
polypphenylene terephyhalamide PPTA
secondary bonding
quenching
19. Term used to describe a polymer that contains significant numbers of both syndiotactic and isotactic dyads
atactic
tow
thermosets
additives
20. Conformation that occurs when the largest substituent in a molecule are offset by 60
oligomers
conformation
gauche conformation
solution spinning
21. 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
blends
gauche conformation
glass transition temperature Tg
die
22. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
acrylic
primary termination
propagation
block copolymers
23. 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
condensation/step- growth polymerization
any carbon with double bonds or repeated substituents
vinyl monomer
fillers
24. Pigments or dyes that change the way light is absorbed or reflected by a polymer
tow
constitution
coloring agents
gauche conformation
25. Covalently bonded chains of molecules with small monomer units repeated from end to end
polymer backbone
plasticizers
copolymer
polymers
26. Softening agents
relative molecular mass RMM
plasticizers
polypphenylene terephyhalamide PPTA
viscose process
27. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
screen pack
primary termination
addition polymerization/chain growth/free- radical polymerization
branching
28. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
gauche conformation
propagation
stabilizers
dyes
29. Number of bonds a molecule has formed
screen pack
alternating copolymers
functionality
gauche conformation
30. Polymer that is made up a single repeat unit
polyviyl chloride PVC
freeze line
monomers
homopolymer
31. 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
condensation/step- growth polymerization
screen pack
weight average molecular weight Mw
free radical
32. On of the two most common reaction schemes used to create polymers - involving three steps: initiaition - propogation - and termination
staggered conformation
addition polymerization/chain growth/free- radical polymerization
branching
plasticizers
33. 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
addition polymerization/chain growth/free- radical polymerization
monomers
quenching
34. Terminating a condensation/step- growth polymerization reaction by adding a material with only one functional group
quenching
syndiotactic dyad
thermoplastics
polypphenylene terephyhalamide PPTA
35. First step in the process of polymerization - during which a free radical is formed
degree of polymerization DPn
screen pack
initiation
conformation
36. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
nylon
polyurethanes
poly- p- phenylene benzobisoxazole PBO
pigments
37. 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
polymers
polyurethanes
graft copolymers
38. Final step in the polymerization process - which causes the elongation of the polymer chain to come to an end
mutual termination
tacticity
termination
staggered conformation
39. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber
number average molecular weight Mn
graft copolymers
copolymer
spinneret
40. Polymers that can stretch by 200% or more and still return to their original length when released; polyurethatnes and the aliphatic thermosets(rubbers)
free radical
polyesters
elastomers
poly- p- phenylene benzobisoxazole PBO
41. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
functional groups
screen pack
thermosets
eclipsed conformation/ cis - conformation
42. 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
polymethylmethacrylate PMMA
quenching
atactic
43. Is not asymetric and cannot have multiple configurations
primary bonding
propagation
any carbon with double bonds or repeated substituents
functionality
44. Atoms attached to the polymer backbone.
stabilizers
side groups/ substituents
additives
plasticizers
45. 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
oligomers
barrel
High volume thermoplastics HVTP
glass transition temperature Tg
46. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
elastomers
oligomers
propagation
polyamides
47. Primary raw material for most polymers
injection molding
asymetric
addition polymerization/chain growth/free- radical polymerization
petroleum
48. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
relative molecular mass RMM
plyacrylonitrile PAN
asymetric
monomers
49. Covalent bonding of the polymer backbone and side groups
primary bonding
vinyl monomer
pigments
primary termination
50. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
poly- p- phenylene benzobisoxazole PBO
primary termination
homopolymer
shot size