BME/ME 4814: Biomaterials
BME/ME 4814 Exam 1 LATEST 2025 ANSWERS -
COMPLETE QUESTION AND ANSWERS GRADED
A (Worcester Polytechnic Institute)
Tg of a biopolymer is 55C. At body temperature it is likely to be...
hard and brittle
polylactide is produced by condensation polymerization...True or false
False! its produced by ring opening polymerization
starch is a....
homopolymer with alpha glucose mers
If G' is greater than G'', is a material a viscoelastic solid or liquid?
viscoelastic solid
biopolymers undergo creep when subjected to stresses inside the body. During this
creep, compliance INCREASES with increasing time. True or false?
True
,BME/ME 4814: Biomaterials
if the pKa is smaller, is the degree of ionization greater or smaller?
greater
at low pressures, the compliance of a vein is how much relative to the compliance of a
large artery?
15 times the compliance of a large artery
greatest amount of viscoelastic deformation at body temperature? hydroxyapetite, CP
Ti, Co-Cr alloy, ceramic, PMMA?
PMMA (also PLLA, PEO, PPO)
do crosslinked polymers crystallize?
no!!!
what is the equation for compliance?
strain/stress
,BME/ME 4814: Biomaterials
what is the equation for the degree of polymerization?
MW=DOP*mer weight
so DOP = MW/mer weight
Which of the following is likely to represent the structure of a pluronic:
PEO-PP-PEO
PPO-PE-PPO
PEO-PPO-PEO
PPO-PEO-PPO
PE-PP-PE
PE-PPO-PEO
PEO-PPO-PEO
What three important polymers degrade by surface degradation?
polyanhydrides
polyorthoesters
PTMC
What polymer is used in a vertebroplasty?
PMMA
, BME/ME 4814: Biomaterials
What is the DOV for metals and ceramics?
1
What is the DOV of skin?
0.3
What structural components would make a polymer more hydrophobic?
having more CH2 and hydrocarbons
What structural components would make a polymer more hydrophilic?
COOH or OH groups
If the temperature is greater than the LCST for a pluronic the pluronic will be a ......
a gel
What types of polymers are sensitive to pH?
Acrylics (PAA and NiPAAM)
BME/ME 4814 Exam 1 LATEST 2025 ANSWERS -
COMPLETE QUESTION AND ANSWERS GRADED
A (Worcester Polytechnic Institute)
Tg of a biopolymer is 55C. At body temperature it is likely to be...
hard and brittle
polylactide is produced by condensation polymerization...True or false
False! its produced by ring opening polymerization
starch is a....
homopolymer with alpha glucose mers
If G' is greater than G'', is a material a viscoelastic solid or liquid?
viscoelastic solid
biopolymers undergo creep when subjected to stresses inside the body. During this
creep, compliance INCREASES with increasing time. True or false?
True
,BME/ME 4814: Biomaterials
if the pKa is smaller, is the degree of ionization greater or smaller?
greater
at low pressures, the compliance of a vein is how much relative to the compliance of a
large artery?
15 times the compliance of a large artery
greatest amount of viscoelastic deformation at body temperature? hydroxyapetite, CP
Ti, Co-Cr alloy, ceramic, PMMA?
PMMA (also PLLA, PEO, PPO)
do crosslinked polymers crystallize?
no!!!
what is the equation for compliance?
strain/stress
,BME/ME 4814: Biomaterials
what is the equation for the degree of polymerization?
MW=DOP*mer weight
so DOP = MW/mer weight
Which of the following is likely to represent the structure of a pluronic:
PEO-PP-PEO
PPO-PE-PPO
PEO-PPO-PEO
PPO-PEO-PPO
PE-PP-PE
PE-PPO-PEO
PEO-PPO-PEO
What three important polymers degrade by surface degradation?
polyanhydrides
polyorthoesters
PTMC
What polymer is used in a vertebroplasty?
PMMA
, BME/ME 4814: Biomaterials
What is the DOV for metals and ceramics?
1
What is the DOV of skin?
0.3
What structural components would make a polymer more hydrophobic?
having more CH2 and hydrocarbons
What structural components would make a polymer more hydrophilic?
COOH or OH groups
If the temperature is greater than the LCST for a pluronic the pluronic will be a ......
a gel
What types of polymers are sensitive to pH?
Acrylics (PAA and NiPAAM)
