Chemistry Reference
In-Depth Information
q
fraction of all monomers in a sample which form part of cross-links
q
E
heat removed by condenser and/or other devices
q
i
quantity of polymer in unit volume of sample with molecular weight
M
i
r
radius
r
radial position (units of length)
r
number of reactive groups per molecule in end group determinations
r
distance between light-scattering source and viewer
r
number of segments in a polymer
r
e
radius of equivalent sphere
r
g
radius of gyration
r
2
number of segments
s
probability that a monomer-ended radical will grow by monomer addi-
tion in a free radical polymerization
s
n
standard deviation of number distribution
s
w
standard deviation of weight distribution
t
time
t
pipe wall thickness
t
0
,
t
1
flow times for solvent and solution, respectively, in capillary viscometry
of polymer solutions
t
1
/
2
half-life
u
dummy symbol for time
u
probability function
u
constant in equation linking,
T
g
and
M
n
v
flow rate of liquid
v
probability function
v
volume of a molecule
v
2
specific volume of polymer
w
weight fraction
w
interaction energy
w
(subscript) weight distribution
w
c
weight fraction of polymer in crystalline state
x
number of repeating units in polymer molecule
x
mole fraction
x
Cartesian coordinate
x
ratio of comonomer concentrations in monomer feed
y
Cartesian coordinate
y
w
weight average degree of polymerization
z
Cartesian coordinate
z
ratio of comonomers in copolymer
z
charge on ion
z
number of nearest neighbors in liquid lattice
Γ
(gamma) virial coefficients
Γ
calibration factor, dimensionless
Δ
(delta) difference
