Thesis (MSc)--Stellenbosch University, 2001. / ENGLISH ABSTRACT: In this study, the feasibility of the non-conjugated 1,5-hexadiene as monomer in
metallocene catalised cyclopolymerizations was considered. Homopolymers and
copolymers with ethylene, propylene, 1-pentene, 1-hexene and 2-methyl-1,5-
hexadiene as comonomers were synthesised in the presence of Cp2ZrCh and
rac-Et(lnd)2Zrh. The microstructure (stereoregularity and cyclisation) and
number-average molecular weight were determined from NMR analysis.
Crystalline oligomers with functional (eg -OH) and vinylidene end groups were
obtained. / AFRIKAANSE OPSOMMING: Die studie behels die ondersoek rakende die gebruik van ongekonjugeerde 1,5-
heksadieen as monomeer in metalloseengekataliseerde polimerisasies.
Homopolimere, sowel as kopolimere van etlieen, propileen, 1-penteen, 1-
hekseen en 2-metiel-1,5-heksadieen, is in die teenwoordigheid van Cp2ZrChen
rac-Et(lnd)2ZrCI2 gepolimeriseer. Die mikrostruktuur (stereochemie en
siklisering) en die getal-gemiddelde molekulêre gewig van die gesintetiseerde
polimere is met behulp van KMR spektroskopie ondersoek. Die studie het
getoon dat kristallyne oligomere met funksionele (bv -OH) en vinilideen endgroepe
gesintetiseer is.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/52403 |
| Date | 12 1900 |
| Creators | Smit, Madri |
| Contributors | Van Reenen, A. J., Stellenbosch University. Faculty of Science. Dept. of Chemistry & Polymer Science. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | 72, [22] p. : ill. |
| Rights | Stellenbosch University |
Page generated in 0.0043 seconds