702
Advanced techniques such as 3D X-ray ptychography and X-ray fluorescence
tomography are recently utilized to understand the fragmentation behavior of catalyst and radial distribution of metal in the catalyst-polymer particles and continuous
bisection of the catalyst particles during polymerization [70]. A combination of two
homogeneous catalysts is utilized as an approach to synthesize disentangled ultrahigh molecular weight polyethylene. The synergy between Ti
3+
and Al
3+
is established using a set of physicochemical and spectroscopic techniques to further
understand the chain growth during polymerization [71]. Overall, the field of
Ziegler-Natta catalysis is unraveling exciting avenues to contribute towards the
quality of polyolefins produced in terms of thermos-mechanical properties and
exhibit sufficient promise of being extended to synthesis of other polymeric systems
in future.
References
1. Ziegler K, Holzkamp E, Breil H, Martin H (1955) Polymerization of ethylene and other olefins. Angew Chem 67(16):426
2. Natta N, Pino P, Corradini P, Danusso F, Mantica E, Mazzanti G, Moraglio G (1955) Crystalline
high polymers of α-olefins. J Am Chem Soc 77(6):1708–1710
3. Natta G, Pino P, Mazzanti G, Giannini U, Mantica E, Peraldo M (1957) The nature of some
soluble catalysts for low pressure ethylene polymerization. J Polym Sci 26(112):120–123
4. Furukawa J, Tsuruta T (1959) Catalytic reactivity and stereospecificity of organometallic compounds in olefin polymerization. J Polym Sci 36(130):275–186
5. Rodriguez LAM, van Looy HM (1966) Studies on Ziegler-Natta catalysts. Part
V. Stereospecificity of the active center. J Polym Sci A Polym Chem 4(8):1971–1992
6. Cossee P (1960) On the reaction mechanism of the ethylene polymerization with heterogeneous Ziegler-Natta catalysts. Tetrahedron Lett 38(1):12–16
7. Ludlum DB, Anderson AW, Ashby CE (1958) The polymerization of ethylene by lower valent
compounds of titanium. J Am Chem Soc 80(6):1380–1384
8. Ziegler K (1959) International Conference on Co-ordination Chemistry, London. The Chem
Soc Spec Publ 12(1). Chemistry Society, London
9. Ivin KJ, Rooney JJ, Stewart CD, Green MLH, Mahtab R (1978) Mechanism for the stereospecific polymerization of olefins by Ziegler–Natta catalysts. J Chem Soc Chem Commun
14:604–606
10. Soto J, Steigerwald ML, Grubbs RH (1982) Concerning the mechanism of Ziegler-Natta
polymerization: isotope effects on propagation rates. J Am Chem Soc 104(16):4479–4480
11. Corradini P, Barone V, Fusco R, Guerra G (1979) Analysis of models for the Ziegler-Natta stereospecific polymerization on the basis of non-bonded interactions at the catalytic site—I. The
Cossee model. Eur Polym J 15(12):1133–1141
12. Langer AW Jr (1977) Base effects on selected Ziegler-type catalysts. Ann N Y Acad Sci
295(1):110–126
13. Breslow DS, Newburg NR (1959) Bis-(cyclopentadienyl)-titanium dichloride- alkylaluminum
complexes as soluble catalysts for the polymerization of ethylene
1,2
. J Am Chem Soc
81(1):81–86
14. Andresen A, Cordes HG, Herwig J, Kaminsky W, Merck A, Mottweiler R, Pein J, Sinn H,
Vollmer HJ (1976) Halogen-free soluble Ziegler catalysts for the polymerization of ethylene.
Control of molecular weight by choice of temperature. Angew Chem 15(10):630–632
A. S. K. Sinha and U. Ojha
Advanced techniques such as 3D X-ray ptychography and X-ray fluorescence
tomography are recently utilized to understand the fragmentation behavior of catalyst and radial distribution of metal in the catalyst-polymer particles and continuous
bisection of the catalyst particles during polymerization [70]. A combination of two
homogeneous catalysts is utilized as an approach to synthesize disentangled ultrahigh molecular weight polyethylene. The synergy between Ti
3+
and Al
3+
is established using a set of physicochemical and spectroscopic techniques to further
understand the chain growth during polymerization [71]. Overall, the field of
Ziegler-Natta catalysis is unraveling exciting avenues to contribute towards the
quality of polyolefins produced in terms of thermos-mechanical properties and
exhibit sufficient promise of being extended to synthesis of other polymeric systems
in future.
References
1. Ziegler K, Holzkamp E, Breil H, Martin H (1955) Polymerization of ethylene and other olefins. Angew Chem 67(16):426
2. Natta N, Pino P, Corradini P, Danusso F, Mantica E, Mazzanti G, Moraglio G (1955) Crystalline
high polymers of α-olefins. J Am Chem Soc 77(6):1708–1710
3. Natta G, Pino P, Mazzanti G, Giannini U, Mantica E, Peraldo M (1957) The nature of some
soluble catalysts for low pressure ethylene polymerization. J Polym Sci 26(112):120–123
4. Furukawa J, Tsuruta T (1959) Catalytic reactivity and stereospecificity of organometallic compounds in olefin polymerization. J Polym Sci 36(130):275–186
5. Rodriguez LAM, van Looy HM (1966) Studies on Ziegler-Natta catalysts. Part
V. Stereospecificity of the active center. J Polym Sci A Polym Chem 4(8):1971–1992
6. Cossee P (1960) On the reaction mechanism of the ethylene polymerization with heterogeneous Ziegler-Natta catalysts. Tetrahedron Lett 38(1):12–16
7. Ludlum DB, Anderson AW, Ashby CE (1958) The polymerization of ethylene by lower valent
compounds of titanium. J Am Chem Soc 80(6):1380–1384
8. Ziegler K (1959) International Conference on Co-ordination Chemistry, London. The Chem
Soc Spec Publ 12(1). Chemistry Society, London
9. Ivin KJ, Rooney JJ, Stewart CD, Green MLH, Mahtab R (1978) Mechanism for the stereospecific polymerization of olefins by Ziegler–Natta catalysts. J Chem Soc Chem Commun
14:604–606
10. Soto J, Steigerwald ML, Grubbs RH (1982) Concerning the mechanism of Ziegler-Natta
polymerization: isotope effects on propagation rates. J Am Chem Soc 104(16):4479–4480
11. Corradini P, Barone V, Fusco R, Guerra G (1979) Analysis of models for the Ziegler-Natta stereospecific polymerization on the basis of non-bonded interactions at the catalytic site—I. The
Cossee model. Eur Polym J 15(12):1133–1141
12. Langer AW Jr (1977) Base effects on selected Ziegler-type catalysts. Ann N Y Acad Sci
295(1):110–126
13. Breslow DS, Newburg NR (1959) Bis-(cyclopentadienyl)-titanium dichloride- alkylaluminum
complexes as soluble catalysts for the polymerization of ethylene
1,2
. J Am Chem Soc
81(1):81–86
14. Andresen A, Cordes HG, Herwig J, Kaminsky W, Merck A, Mottweiler R, Pein J, Sinn H,
Vollmer HJ (1976) Halogen-free soluble Ziegler catalysts for the polymerization of ethylene.
Control of molecular weight by choice of temperature. Angew Chem 15(10):630–632
A. S. K. Sinha and U. Ojha