MSE 2090 Exam 2 questions
with 100% correct answers
repeat unit - answer fundamental unit of a polymer
degree of polymerization (DP) - answer known as the number of repeat
units (mers) that make up a polymer chain
DP, molecular weight - answer affect polymer properties (including
mechanical properties and melting temperature)
length of the chain - answer Knowledge of the 'mer' molecular weight and
the polymer chain molecular weight allow one to know the ________
linear, branched, cross linked (networked) - answer the different polymer
shapes
inhibits (hinders) - answer branching in polymers _______ crystallization
stronger - answer Crystalline polymers tend to be ______ than branched
polymers
networked (cross-linked) - answer what kind of polymer chains are
connected by covalent bonds?
linear, branched - answer what kind of polymer chains are connected by
nonbonding interactions?
linear, branched (you don't need to break any bonds to separate them) -
answer what kind of polymer chains can be recycled and why?
van der waals, hydrogen bonds (stronger) - answer two types of
nonbonding interactions in polymer chains
, crystalline regions - answer Copolymers tend to align and form ___________
random copolymer - answer random arrangements of 'mers' along the
chain
alternating copolymer - answer mers alternate along the chain
block polymer - answer blocks of mers alternating between various types
graft polymer - answer one mer is attached as a branch to the second mer
which forms the backbone of the polymer chain
tacticity - answer occurs in polymers that have a distinct side group which
can alternate which side of the polymer backbone it is on without
alternating the main structure of the polymer
isotactic, syndiotactic, atactic - answer types of tacticity
long (can become more entangled and bulky) - answer (long/short)
polymer molecules make stronger chains and why?
short (can move more easily past one another) - answer (long/short)
polymer molecule chains flow more easily and why?
bimodal distribution of polymer lengths - answer creating polymer with a
_________ would increase strength and would flow more easily
isotactic - answer all of the side groups are on the same side of the main
chain
syndiotactic - answer side groups are on alternating sides of the main
chain
with 100% correct answers
repeat unit - answer fundamental unit of a polymer
degree of polymerization (DP) - answer known as the number of repeat
units (mers) that make up a polymer chain
DP, molecular weight - answer affect polymer properties (including
mechanical properties and melting temperature)
length of the chain - answer Knowledge of the 'mer' molecular weight and
the polymer chain molecular weight allow one to know the ________
linear, branched, cross linked (networked) - answer the different polymer
shapes
inhibits (hinders) - answer branching in polymers _______ crystallization
stronger - answer Crystalline polymers tend to be ______ than branched
polymers
networked (cross-linked) - answer what kind of polymer chains are
connected by covalent bonds?
linear, branched - answer what kind of polymer chains are connected by
nonbonding interactions?
linear, branched (you don't need to break any bonds to separate them) -
answer what kind of polymer chains can be recycled and why?
van der waals, hydrogen bonds (stronger) - answer two types of
nonbonding interactions in polymer chains
, crystalline regions - answer Copolymers tend to align and form ___________
random copolymer - answer random arrangements of 'mers' along the
chain
alternating copolymer - answer mers alternate along the chain
block polymer - answer blocks of mers alternating between various types
graft polymer - answer one mer is attached as a branch to the second mer
which forms the backbone of the polymer chain
tacticity - answer occurs in polymers that have a distinct side group which
can alternate which side of the polymer backbone it is on without
alternating the main structure of the polymer
isotactic, syndiotactic, atactic - answer types of tacticity
long (can become more entangled and bulky) - answer (long/short)
polymer molecules make stronger chains and why?
short (can move more easily past one another) - answer (long/short)
polymer molecule chains flow more easily and why?
bimodal distribution of polymer lengths - answer creating polymer with a
_________ would increase strength and would flow more easily
isotactic - answer all of the side groups are on the same side of the main
chain
syndiotactic - answer side groups are on alternating sides of the main
chain
