Magnesium chloride‐supported high‐mileage catalysts for olefin polymerization XI. Determinations of poly(decene‐1) molecular weight chain dimension and thermal transitions

Abstract

Abstract Decene‐1 was polymerized with the CW catalyst and fractionated by precipitation technique. Light‐scattering and viscometric measurements on these fractions established the relationship [η] = 5.19 × 10 −3 M . The unperturbed mean square end‐to‐end distance is (〈 R 〉/ M ) 1/2 = (6.17 ± 0.34) × 10 −9 . Light‐scattering data is consistent with a relatively stiff molecule with length of L = 1.75 × 10 −5 cm for poly(decene‐1) with MW = 397,000. Its mean square radius of gyration 〈 R 〉 is 2.79 × 10 −11 cm. 2 The ratio of L 2 /〈 R 〉 = 11 is close to the theoretical ratio of 12 for this kind of macromolecule.