Chemistry Reference
In-Depth Information
Figure 18.
3D surface plot of a HDPE sample with a cut view produced at LogM
ΒΌ
5.5 in the direction of the temperature
axis. The highlighted edge of the surface plot represents a TREF profile at that molar mass value.
resulting data series is overlaid with the
MWD curve in Figure 19.
It is well established
[2,3,15]
carbons (CH
3
/1000C), even for molecular
weights down to 1000 (either coming from
short chain branches or chain ends) by
a linear inverse function; consequently, a
T
w
is
correlated to the methyls groups per 1000
that
Figure 19.
MWD of a HDPE sample and
T
w
averages as a function of molecular weight. The values of
T
w
decrease sharply for
molecular weights lower than 10,000 due to chain end effects in TREF fractionation.
T
w
decreases in the high
molecular weight range due to comonomer incorporation.
