Chem 112 Test Study Questions with
Verified Answers
Define Vulcanization
S₈ is used to create linkages between individual polymer chains in rubber. Carried out by
heating the rubber where some carbon bonds are broken and replaced with the sulfur.
Define Cross-Link
A substance is used to create a linkages between individual polymer chains.
Define Elastomer
A material that can stretch or bend then return to its original shape.
Physical properties after cross linking a polymer
The polymer's melting point will rise, prevents the polymer from dissolving. It can also be
used to stiffen up a material.
Define Tacticity
Tacticity describes the relative arrangements of such chiral carbon atoms within a polymer.
Define an Isotactic Polymer
An isotactic polymer that has all substituents on the same side of the polymer chain are said to
be Isotactic polymers
Define Syndiotactic Polymer
, A Syndiotactic Polymer is a polymer with substituents that that alternate positions along
a polymer chain
Define Atactic Polymer
An Atactic Polymer is a polymer whose substituents are randomly oriented along a polymer
chain
Proteins and Amino Acids are what type of polymer?
Proteins and Amino Acids are Condensation Polymers
Define Polyamides
A polyamide is a polymer where the monomers are connected by an amide linkages.
ex.
OO
|| ||
-[-NH-(-CH₂-)₆-NH-C-(-CH₂-)-C-]-
DNA is what type of Polymer?
DNA is a condensational polymer
Define sintering
Sintering is a process where a slurry of powder is heated under HIGH TEMPERATURE and
PRESSURE that bonds particles together.
What is the sol-gel process?
The sol-gel process produces particles of nearly uniform size that make the production of
a ceramic without gaps or cracks more probably.
The sol-gel process takes place after the sintering process
Define composite material
Verified Answers
Define Vulcanization
S₈ is used to create linkages between individual polymer chains in rubber. Carried out by
heating the rubber where some carbon bonds are broken and replaced with the sulfur.
Define Cross-Link
A substance is used to create a linkages between individual polymer chains.
Define Elastomer
A material that can stretch or bend then return to its original shape.
Physical properties after cross linking a polymer
The polymer's melting point will rise, prevents the polymer from dissolving. It can also be
used to stiffen up a material.
Define Tacticity
Tacticity describes the relative arrangements of such chiral carbon atoms within a polymer.
Define an Isotactic Polymer
An isotactic polymer that has all substituents on the same side of the polymer chain are said to
be Isotactic polymers
Define Syndiotactic Polymer
, A Syndiotactic Polymer is a polymer with substituents that that alternate positions along
a polymer chain
Define Atactic Polymer
An Atactic Polymer is a polymer whose substituents are randomly oriented along a polymer
chain
Proteins and Amino Acids are what type of polymer?
Proteins and Amino Acids are Condensation Polymers
Define Polyamides
A polyamide is a polymer where the monomers are connected by an amide linkages.
ex.
OO
|| ||
-[-NH-(-CH₂-)₆-NH-C-(-CH₂-)-C-]-
DNA is what type of Polymer?
DNA is a condensational polymer
Define sintering
Sintering is a process where a slurry of powder is heated under HIGH TEMPERATURE and
PRESSURE that bonds particles together.
What is the sol-gel process?
The sol-gel process produces particles of nearly uniform size that make the production of
a ceramic without gaps or cracks more probably.
The sol-gel process takes place after the sintering process
Define composite material
