Copolymerization of Propylene and 1-Butene with Al (C2H5) 3-TiCl3 Catalyst
1965 Volume 22 Issue 243 Pages 446-450
Details
1965 Volume 22 Issue 243 Pages 446-450
The copolymerization of propylene (monomer 1) and 1-butene (monomer 2) was carried out with Al (C2H5) 3-TiCl3 catalyst in order to find the reactivity ratios of these monomers and some properties of the copolymer.
From the results of solubility test and IR measurement of the copolymerization product, it was found that copolymer free from both homopolymers was produced. The monomer reactivity ratios were r1=1.62 and r2=0.50 in n-heptane at 60°C and at the molar ratio of 1.5: 1 of Al (C2H5) 3-TiCl3. The solubility of copolymer in n-heptane and ether increased with 1-butene content in the copolymer. All the copolymer containing more than 10 mole % of 1-butene was soluble in n-heptane. The IR spectrum of the copolymer had a new absorption band at 1240 cm-1, which was not found in polypropylene, poly (1-butene), and their blend. The strength of this absorption band is maximum at 40-50 mole % 1-butene content in copolymer. This band is considered to be characteristics of the propylene-1-butene random copolymer.
