Interference 103,482
Alternatively, a syndio-isoblock polyolefin with a
syndiotactic sequence separating blocks of isotactic sequences
may have the following mmrrmm configuration:
\ \ \ \ \ \
\
(mmrrmm).
The distinction is material to the issues presented in this
interference because the pentad distribution data taken from
the C-13 NMR spectrum of a syndio-isoblock polyolefin having
the mmrrrrmm configuration and the average sequence length of
the isotactic and syndiotactic sequences calculated for that
syndio-isoblock polyolefin differ significantly from the
pentad distribution data taken from the C-13 NMR spectrum of
the
syndio-isoblock polyolefin having the mmrrmm configuration and
the average sequence length of the isotactic and syndiotactic
sequences calculated therefrom.
(2) Syndio-isoblock olefin polymers having molecular
chains in which syndiotactic and isotactic sequences are
present and
the average sequence length is 3 to 50 monomer units, eg.,
polymers with mmrrrrmm configurations, are all hemiisotactic
olefin polymers, accepting the structural definition of
48
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Last modified: November 3, 2007