SUN Li-xin, LIN Shang-an. TERPOLYMERIZATION OF ETHYLENE,PROPYLENE AND 1-BUTENE WITH HIGHLY ACTIVE SUPPORTED TITANIUM CATALYST II.Characterizations of the Terpolymers[J]. Acta Polymerica Sinica, 1990,(2):205-212.
SUN Li-xin, LIN Shang-an. TERPOLYMERIZATION OF ETHYLENE,PROPYLENE AND 1-BUTENE WITH HIGHLY ACTIVE SUPPORTED TITANIUM CATALYST II.Characterizations of the Terpolymers[J]. Acta Polymerica Sinica, 1990,(2):205-212.DOI:
The characterization of ethylene-propylene-1-butene terpolymers synthesized by TiCl4
Ti (OBu)4/MgCl2/ethylbenzoate/2SiCl2/AlEt3 catalyst is described. DSC
WAXD analysis and solvent extraction show that the EPB terpolymers in a certain range of composition are elastomers without detectable crystallinity
which demonstrates a rather random structure and makes them promising for quality rubber. The comonomer sequence distributions are
by 13C-NMR analysis of binary copolymers
first-order Markovian for EP and EB copolymers but Bernoul-lian for PB copolymer. Three pairs of monomer reactivity ratios were evaluated. The assign-memts of the chemical shifts in the 13C-NMR spectra of EPB terpolymer was made and a method was proposed to determine the chemical composition of the EPB terpolymers.