Terpolymerization of ethylene, propylene, and butene-1 with highly active supported titanium catalyst

✍ Scribed by Lixin Sun; Shangan Lin

• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 645 KB
• Volume: 28
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/pola.1990.080280523

✦ Synopsis

Abstract

An investigation of ethylene‐propylene‐butene‐1 terpolymerization in the presence of TiCl~4~, Ti(OBu)~4~/MgCl~2~/ethylbenzoate (EB)/π~2~SiCl~2~/AlEt~3~ catalyst is described. The catalytic efficiency is very high, i.e., 86000g/g Ti under ambient conditions. The decay rate of terpolymerization with time fulfills the equation: R~t~ = R~s~ + (R~0~ ‐ R~s~)e^−βt^. Characterizations with DSC, WAXD, ^13^C‐NMR, and solvent extraction of the resulting terpolymers were studied. Terpolymers of certain composition are elastomers without detectable crystallinity, which demonstrates a rather random sequence distribution and makes them promising for quality rubber. The assignment of the chemical shifts in ^13^C‐NMR spectra is made. The gas permeabilities of the terpolymer membrane is of PO~2~ = 2.35 × 10^‐9^ cm^3^ (STP) cm/cm^2^ s cm Hg and PO~2~/PN~2~ = 3.8 under optimum conditions.