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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. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
polyurethanes
extruder
relative molecular mass RMM
polyviyl chloride PVC
2. Carbon atom capable of multiple configurations due to four different substituents
quenching
asymetric
branching
injection molding
3. 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
rayon
plasticizers
hopper
propagation
4. Polymer made up of two of more differenet monomers covalently bonded together
hopper
copolymer
end groups
glass transition temperature Tg
5. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
acrylic
termination
screen pack
functionality
6. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
configuration
most common condensation/step- growth polymerization occur between....
polyamides
isotactic dan
7. Technique used to make rayon - which involves treating cellulose from wood or cotton with alkali and extruding it through a spinneret
viscose process
random copolymers
graft copolymers
conformation
8. Double bounded organic molecule used to begin addition polymerization
weight average molecular weight Mw
dyes
homopolymer
vinyl monomer
9. Softening agents
viscose process
configuration
polymers
plasticizers
10. Atoms attached to the polymer backbone.
isotactic dan
side groups/ substituents
random copolymers
polypphenylene terephyhalamide PPTA
11. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
solution spinning
glass transition temperature Tg
polyesters
plyacrylonitrile PAN
12. Polymers that contain amide (- N-) groups in the chain
most common condensation/step- growth polymerization occur between....
side groups/ substituents
quenching
polyamides
13. Relative configuration of adjecent asymmetric carbons
tacticity
thermoplastics
polyurethanes
coloring agents
14. Polymers that cannot be repeatedly melted and re- formed due to strong covalent bonding between chains
isotactic dan
blends
thermosets
aramid
15. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
propagation
glass transition temperature Tg
block copolymers
nylon
16. 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
quenching
acrylic
number average molecular weight Mn
relative molecular mass RMM
17. Polymer in which more than 85% of the amide groups are bonded to two aromatic rings
syndiotactic dyad
aramid
oligomers
conformation
18. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
pigments
trans - conformation
rayon
freeze line
19. Refers to the spatial geometry of the main chain carbon and substituents that can be changed by rotation and flexural motion
functionality
blends
addition polymerization/chain growth/free- radical polymerization
conformation
20. 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
step- growth/condensation polymerization
High volume thermoplastics HVTP
configuration
isotactic dan
21. First step in the process of polymerization - during which a free radical is formed
cracking
screen pack
elastomers
initiation
22. Conformation in which the largest substituents are offset by 180
glass transition temperature Tg
thermosets
trans - conformation
hopper
23. Primary raw material for most polymers
viscose process
graft copolymers
extruder
petroleum
24. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
plasticizers
condensation/step- growth polymerization
polymers
tow
25. 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
dyes
step- growth/condensation polymerization
polyurethanes
cracking
26. 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
weight average molecular weight Mw
constitution
step- growth/condensation polymerization
tacticity
27. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
thermosets
plasticizers
hopper
High volume thermoplastics HVTP
28. Porcess of breaking large organic hydrocarbons into smaller molecules
condensation/step- growth polymerization
vulcanization
tacticity
cracking
29. 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
polyurethanes
condensation/step- growth polymerization
quenching
block copolymers
30. Two substituents found at both ends of a polymer chain - which have little to no effect on mechanical properties
blends
polyurethanes
end groups
additives
31. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
oligomers
additives
polyviyl chloride PVC
side groups/ substituents
32. Additives whose primary purpose is to reduce the final cost of the product
aramid
fillers
branching
shot size
33. Covalent bonding of the polymer backbone and side groups
conformation
primary bonding
most common condensation/step- growth polymerization occur between....
acrylic
34. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
condensation/step- growth polymerization
eclipsed conformation/ cis - conformation
graft copolymers
nylon
35. One type of polymer that contains at least 85% of polyacrylonitrile PAN
solution spinning
addition polymerization/chain growth/free- radical polymerization
rayon
acrylic
36. Type of polyamide in which less that 85% of the amide groups are bonded to the aromatic rings
plasticizers
addition polymerization/chain growth/free- radical polymerization
thermoplastics
nylon
37. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
mutual termination
constitution
conformation
viscose process
38. Plexiglas - lucite - transparent - shatterproof - biocompatible - hockey rinks - taillights - implants
polymer backbone
polymethylmethacrylate PMMA
structural unit
trans - conformation
39. Type of plymer processing similar to extrusion but can be used to develop parts with complex shapes rapidly
homopolymer
injection molding
free radical
step- growth/condensation polymerization
40. Additives that improve a polymer's resistance to variable that cause bonds to rupture - such as heat and light
stabilizers
end groups
vinyl monomer
cracking
41. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
polyurethanes
isotactic dan
number average molecular weight Mn
functional groups
42. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property
thermoplastics
polyurethanes
glass transition temperature Tg
additives
43. Conformation that occurs when the largest substituent in a molecule are offset by 60
barrel
degree of polymerization DPn
pigments
gauche conformation
44. Arrangement of the largest substituents where the substituets are offset by 120
staggered conformation
High volume thermoplastics HVTP
hopper
gauche conformation
45. Number of bonds a molecule has formed
asymetric
thermosets
side groups/ substituents
functionality
46. Coloring agents that do not dissolve into the polymer
nylon
propagation
pigments
polymer backbone
47. Covalently bonded chains of molecules with small monomer units repeated from end to end
spinneret
polyesters
plasticizers
polymers
48. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
viscose process
nylon
extruder
addition polymerization/chain growth/free- radical polymerization
49. Low- molecular- weight building blocks repeated in the polymer chain
primary bonding
barrel
thermoplastics
monomers
50. 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
conformation
mutual termination
degree of polymerization DPn
shot size
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