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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. Large spool that is used to wind solidified polymer fibers after they have been pushed through the spinneret
tow
elastomers
isotactic dan
poly- p- phenylene benzobisoxazole PBO
2. All issues related to bonding in polymers including primary and secondary bonding - branching - formations of networks - and end groups
solution spinning
constitution
aramid
copolymer
3. Polymers comprised of two or more different monomer units that attach to the chain in an alternating pattern A-B-A-B...
alternating copolymers
gauche conformation
injection molding
polyurethanes
4. Occurs when substituent are directly aligned - causing substantial repulsion between the substituents and an unfavorable conformation.
eclipsed conformation/ cis - conformation
melt spinning
hopper
thermoplastics
5. 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
polyamides
spinneret
secondary bonding
6. 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
block copolymers
most common condensation/step- growth polymerization occur between....
constitution
barrel
7. Configuration of a polymer in which the sucstituent is located on opposite sides of the molecule in each repeating unit
syndiotactic dyad
quenching
additives
stabilizers
8. 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
conformation
polymers
pigments
relative molecular mass RMM
9. Stiff and extremely inert polymer - low cost - chemical and moisture resistant - outdoor stability
polyviyl chloride PVC
secondary bonding
fillers
acrylic
10. 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
acrylic
relative molecular mass RMM
isotactic dan
extruder
11. Covalent bonding of the polymer backbone and side groups
plasticizers
polyamides
petroleum
primary bonding
12. Term associate with blown - film apparatus - which indicated the point at which the molecules develop a more crystalline orientation around the bubble of air
relative molecular mass RMM
end groups
freeze line
homopolymer
13. Polymers in which one chain of a particular monomer is attached as a side to a chain of another chain of monomer
quenching
graft copolymers
number average molecular weight Mn
melt spinning
14. Atoms attached to the polymer backbone.
side groups/ substituents
primary termination
gauche conformation
polypphenylene terephyhalamide PPTA
15. Molecules added to a polymer to enhance or alter specific properties or molecules added to concrete for purposed other than altering a specific property
constitution
any carbon with double bonds or repeated substituents
polymethylmethacrylate PMMA
additives
16. Polymer that is made up a single repeat unit
nylon
spinneret
homopolymer
propagation
17. High distance- dependent bonding between adjacent polymer chains; usually includes hydrogen bonding - dipoles - and van der waals
plasticizers
monomers
thermosets
secondary bonding
18. Second stage of polymerization process during which the polymer chain begins to go as monomers are added to the chain
petroleum
vulcanization
polyesters
propagation
19. An acid and an alcohol
isotactic dan
most common condensation/step- growth polymerization occur between....
step- growth/condensation polymerization
nylon
20. Primary raw material for most polymers
petroleum
plasticizers
nylon
block copolymers
21. Lightwieght polymer that absorbs water well; the first syntheric polymer ever constructed
atactic
rayon
dyes
poly- p- phenylene benzobisoxazole PBO
22. Small chains of bonded monomers whose properties would be altered by the addition of one more monomer unit
plasticizers
oligomers
end groups
coloring agents
23. Low- molecular- weight building blocks repeated in the polymer chain
trans - conformation
staggered conformation
monomers
syndiotactic dyad
24. 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
isotactic dan
weight average molecular weight Mw
glass transition temperature Tg
die
25. Orlon - acrilan - lightweight - durable - carbon - fiber precursor - tennis - racing bikes - helmets
plyacrylonitrile PAN
functionality
elastomers
polymers
26. 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
block copolymers
additives
branching
polymethylmethacrylate PMMA
27. 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
polypphenylene terephyhalamide PPTA
polyesters
step- growth/condensation polymerization
primary termination
28. Process by which chemical cross - linkages can form between adjacent polymer chains - strengthening the material without significantly damaging its elastic properties
additives
polymethylmethacrylate PMMA
vulcanization
plasticizers
29. Circular - stationary block with small holes through which molten polymer can flow to take the shape of a fiber
extruder
spinneret
glass transition temperature Tg
side groups/ substituents
30. 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
polyviyl chloride PVC
initiation
thermosets
condensation/step- growth polymerization
31. 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
aramid
configuration
injection molding
32. Second- order thermodynamic transition in which the onset of large scale chain mobility occures in polymers. Bellow Tg the polymer is glasslike and brittle. above Tg the polymer becomes rubbery and flexible
relative molecular mass RMM
glass transition temperature Tg
functionality
block copolymers
33. Peice of the extrusion apparatus that is used as a filter to separate unmelted particles - dirt - and other solid contaminants from the molten polymer
poly- p- phenylene benzobisoxazole PBO
primary termination
coloring agents
screen pack
34. Carbon atom capable of multiple configurations due to four different substituents
random copolymers
graft copolymers
nylon
asymetric
35. Softening agents
tacticity
plasticizers
vinyl monomer
elastomers
36. Arrangement of the largest substituents where the substituets are offset by 120
freeze line
acrylic
staggered conformation
dyes
37. Sylon - transparent - shatter proof - biocompatible - hockey rinks - taillights - implants
polymer backbone
isotactic dan
poly- p- phenylene benzobisoxazole PBO
additives
38. Molecule containing a highly reactive unpaired electron
gauche conformation
weight average molecular weight Mw
free radical
propagation
39. Specific arrangements of atoms that cause organic compounds to behave in predictable ways
functional groups
blends
spinneret
polymer backbone
40. 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
thermosets
plasticizers
monomers
poly- p- phenylene benzobisoxazole PBO
41. Type of plymer processing similar to extrusion but can be used to develop parts with complex shapes rapidly
injection molding
copolymer
petroleum
asymetric
42. Part of the extrusion apparatus that hols a large quantity of polymer pellets as they are fed into the barrel
configuration
alternating copolymers
hopper
primary termination
43. 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
number average molecular weight Mn
gauche conformation
any carbon with double bonds or repeated substituents
constitution
44. Pigments or dyes that change the way light is absorbed or reflected by a polymer
dyes
plasticizers
isotactic dan
coloring agents
45. Number of bonds a molecule has formed
solution spinning
injection molding
functionality
syndiotactic dyad
46. Device used in the processing of polymers that melts polymer pellets and feeds them continuously through a shaping device
High volume thermoplastics HVTP
polyamides
monomers
extruder
47. Smallest repeating unit in a polymer. aka repeat unit
structural unit
gauche conformation
constitution
freeze line
48. Additives whose primary purpose is to reduce the final cost of the product
any carbon with double bonds or repeated substituents
fillers
poly- p- phenylene benzobisoxazole PBO
secondary bonding
49. Spatial arrangement of substituents around the main chain carbon atom that can be altered only by the breaking of bonds
side groups/ substituents
relative molecular mass RMM
configuration
acrylic
50. Coloring agent that is dissolved directly into the polymer - causing the polymer to change color
nylon
alternating copolymers
graft copolymers
dyes