A. Jerschow et al., NUCLEAR-MAGNETIC-RESONANCE EVIDENCE FOR A NEW MICROSTRUCTURE IN ETHENE-CYCLOPENTENE COPOLYMERS, Macromolecules, 28(21), 1995, pp. 7095-7099
We have analyzed the microstructure of a series of copolymers of ethen
e and cyclopentene prepared with a novel ferrocene-substituted catalys
t using one- and two-dimensional C-13- and H-1-NMR methods. Up to 64%
of the cyclopentene is incorporated as 1,3-cyclopentylene units, which
has not been observed previously in copolymers. The subspectra were d
erived based on a triad model. The polymers appeared to be atactic wit
h mainly cis-incorporated cyclopentylene units. No ring opening could
be detected.