A study of the synthesis and characterization of ethylene/dicyclopentadiene copolymers using a metallocene catalyst

Terpolymerization of Ethylene/Propylene/Diene Monomers Using (2‐PhInd)2ZrCl2 Metallocene Catalysts

“…However, a lowering in activity was more pronounced when increasing the P/E ratio, since addition of diene would inhibit the insertion of ethylene to the active center due to steric effects. As a result, activity decreases with increasing the propylene content in the P/E ratio 35. Under the specified conditions, similar behavior was reported by other researchers 11, 13, 19…”

“…At constant P/E = 20/80 vol.‐% feed ratio, it was observed that when increasing the diene concentration there was also an increase in the diene content of the polymers, a characteristic which was consistent with metallocene systems (Table 3), as reported elsewhere 33, 35. Increasing ENB in the feed would decrease the ethylene content of the polymer (Figure 9).…”

Addition Oligomerization of Dicyclopentadiene: Reactivity of Endo and Exo Isomers and Postmodification

“…The major use of dicyclopentadiene (DCPD) is in resins, particularly, unsaturated polyester resins, inks, adhesives, paints, and high‐energy fuels . Moreover, DCPD is one of the cheapest comonomer largely employed in the copolymerization with ethylene and α‐olefins . In general, analogously to norbornene (NB), the polymerization of DCPD can follow three pathways: (i) ring opening metathesis polymerization (ROMP) which gives polymers containing double bonds in the main chain, (ii) vinyl‐type addition in which the bicyclic structure remains intact and only the π‐bond of the NB ring is involved in the reaction, and (iii) cationic polymerization, giving 2,3‐ and rearranged 9,10‐enchained units through successive migration of the carbocation (Figure ) .…”

Effect of Diethylzinc on the Activity of Ethylene Polymerization by Metallocene Catalyst

“…Recent decades have seen the development of metallocene catalysts in olefin polymerization, which have had a revolutionary impact in both academic and industrial fields . The catalytic polymerization system is composed of the transition‐metal compound, i.e., precatalyst, and the cocatalyst . In addition, other compounds can be introduced into the catalytic system to modify the polymerization behaviors and the polymer structures …”