Table 3. Monomer Sequence Distributions of Poly(ethylene-co-LCAO)s [LCAO = 1-Dodecene (DD), 1-Tetradecene (TD), 1-Hexadecene (HD)] Prepared by the Cp*TiCl2(O-2,6-iPr2-4-SiEt3-C6H2)–MAO Catalyst Systemad.
| triad
sequence distributionc (%) |
dyadsd (%) |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| run | α-olefin | contentb/mol % | EEE | EEC+CEE | CEC | ECE | CCE+ECC | CCC | EE | EC+CE | CC | rEe | rCe | rE·rCf |
| 6 | DD | 15.3 | 52.4 | 29.0 | 3.04 | 13.2 | 2.29 | 66.9 | 31.9 | 1.14 | 4.32 | 0.07 | 0.30 | |
| 24 | TD | 12.0 | 64.0 | 23.6 | 0.4 | 11.7 | 0.3 | trace | 75.8 | 24.0 | 0.2 | 5.81 | 0.02 | 0.11 |
| 37 | HD | 7.1 | 74.1 | 18.8 | 0.06 | 7.0 | 0.08 | trace | 83.5 | 16.5 | 0.04 | 4.56 | 0.01 | 0.05 |
a
For detailed polymerization conditions, see Table 2; C = comonomer [1-dodecene (DD), 1-tetradecene (TD), 1-hexadecene (HD)].
b
Comonomer contents in copolymer estimated using 13C NMR spectra.
c
Calculated using 13C NMR spectra; E = ethylene and C = comonomer (DD, TD, HD).
d
[EE] = [EEE] + 1/2[EEC+CEE], [EC] = [CEC] + [ECE] + 1/2{[EEC+CEE] + [CCE+ECC]}, [CC] = [CCC] + 1/2[CCE+ECC].
e
rE = [C]0/[E]0 × 2[EE]/[EC+CE], rC = [E]0/[C]0 × 2[CC]/[EC+CE].
f
rE·rC = 4[EE][CC]/[EC+CE]2.