Crystallization of α and γ phases in isotactic polypropylene with low ethylene content: Isothermal crystallization and secondary crystallization

Journal of Macromolecular Science - Physics

Volumn 42 B, Issue 3-4 SPEC., 2003, Pages 697-707

  Nozaki, Koji ^a   Endo, Yasuaki ^a   Yamamoto, Takashi ^a   Naiki, Masahiro ^b  

^a YAMAGUCHI UNIVERSITY   (Japan)

^b UBE INDUSTRIES LTD   (Japan)

Author keywords

Isotactic polypropylene; Isothermal crystallization; Secondary crystallization; phase

Indexed keywords

CRYSTAL GROWTH FROM MELT; CRYSTALLIZATION; ETHYLENE; FRACTIONATION; MOLECULAR WEIGHT; TEMPERATURE; X RAY DIFFRACTION ANALYSIS;

ISOTACTIC POLYPROPYLENES; ISOTHERMAL CRYSTALLIZATION;

POLYPROPYLENES;

EID: 0041930582     PISSN: 00222348     EISSN: None     Source Type: Journal    
DOI: 10.1081/mb-120021600     Document Type: Article

References (27)

1. Natta, G.; Pino, P.; Coradini, P. Crystalline high polymers of α-olefins. J. Am. Chem. Soc. 1955, 77, 1708-1710.
2. Natta, G.; Corradini, P. Structure and properties of isotactic polypropylene. Nuovo Cimento Suppl. 1960, 15, 40-51.
3. Keith, H.D.; Padden, F.J., Jr.; Walfer, H.M.; Wickoff, H.W. Evidence for a second crystal form of polypropylene. J. Appl. Phys. 1959, 30, 1485-1488.
4. Turner-Jones, A.; Aizlewood, J.M.; Beckett, D.R. Crystalline forms of isotactic polypropylene. Makromol. Chem. 1964, 74, 134-158.
5. Kardos, J.L.: Christiansen, J.L.; Baer, E. Structure of pressure-crystallized polypropylene. J. Polym. Sci. 1966, 4, 777-778.
6. Hirosaka, M.; Seto, T. Order of the molecular chains in isotactic polypropylene crystals. Polym. J. 1973, 3, 111-127.
7. De Rosa, C.; Guerra, G.; Napolitano, R.; Petraccone, V.; Pirozzi, B. Conditions for the α1-α2 transition in isotactic polypropylene samples. Eur. Polym. J. 1984, 20, 937-941.
8. Guerra, G.; Petraccone; Corradini, P.; De Rosa, C.; Napolitano, R.; Pirozzi, B.; Giunchi, G. Crystalline order and melting behavior of isotactic polypropylene (α-form). J. Polym. Sci. Polym. Phys. 1984, 22, 1029-1039.
9. Corradini, P.; Giunchi, G.; Petraccone, V.; Pirozzi, B.; Vidal, H.M. Structural variations in crystalline isotactic polypropylene (α form) as a function of thermal treatments. Gazz. Chim. Ital. 1980, 110, 413-418.
10. Naiki, M.; Kikkawa, T.; Endo, Y.; Nozaki, K.; Yamamoto, T.; Hara, T. Crystal ordering of α phase isotactic polypropylene. Polymer 2000, 42, 5471-5477.
11. Campbell, R.A.; Phillips, P.J.; Lin, J.S. The gamma phase of high-molecular-weight polypropylene: 1. Morphological aspects. Polymer 1993, 34, 4809-4816.
12. Pae, K.D.; Morrow, D.R.; Sauer, J.A. Interior morphology of bulk polypropylene. Nature 1966, 211, 514-515.
13. Morrow, D.R.; Newman, B.A. Crystallization of low-molecular-weight polypropylene fractions. J. Appl. Phys. 1968, 39 (11), 4944-4950.
14. Addink, E.J.; Beintema, J. Polymorphism of crystalline polypropylene. Polymer 1961, 2, 185-193.
15. Zimmermann, H.J. Structural analysis of random propylene-ethylene copolymers. J. Macromol. Sci. Phys. 1993, B32 (2), 141-161.
16. Mazghani, K.; Phillips, J. γ-phase in propylene copolymers at atmospheric pressure. Polymer 1995, 36 (12), 2407-2411.
17. Laihonen, S.; Gedde, U.W.; Werner, P.E.; Martinez-Salazar, J. Crystallization kinetics and morphology of poly(propylene-stat-ethylene) fractions. Polymer 1997, 38, 361-369.
18. Foresta, T.; Piccarolo, S.; Goldbeck-Wood, G. Competition between α and γ phases in isotactic polypropylene: effect of ethylene content and nucleating agents at different cooling rates. Polymer 2001, 42, 1167-1176.
19. Brückner, S.; Meille, S.V. Non-parallel chains in crystalline γ-isotactic polypropylene. Nature 1989, 340, 455-457.
20. Mezghani, K.; Phillips, P.J. The γ-phase of high molecular weight isotactic polypropylene: III. The equilibrium melting point and the phase diagram. Polymer 1998, 39 (16), 3735-3744.
21. Lotz, B.; Graff, S.; Wittmann, J.C. Crystal morphology of the γ (triclinic) phase of isotactic polypropylene and its relation to the α phase. J. Polym. Sci. Polym. Phys. 1986, 24, 2017-2032.
22. Lotz, B.; Graff, S.; Straupé, C.; Wittmann, J.C. Single crystals of γ phase isotactic polypropylene: combined diffraction and morphological support for a structure with non-parallel chains. Polymer 1991, 32 (16), 2902-2910.
23. Lotz, B.; Wittmann, J.C.; Lovinger, A.J. Structure and morphology of poly(propylenes): a molecular analysis. Polymer 1996, 37 (22), 4979-4992.
24. Zachmann, H.G.; Stuart, H.A. Main- and after-crystallization of terylene from glass state. Makromol. Chem. 1960, 41, 131-147.
25. Schultz, J.M.; Fischer, E.W.; Schaumburg, O.; Zachmann, H.G. Small-angle x-ray scattering studies of melting. J. Polym. Sci. Polym. Phys. 1980, 18, 239-245.
26. Kolb, R.; Wutz, C.; Stribeck, N.; Krosigk, G.V.; Riekel, C. Investigation of secondary crystallization of polymers by means of microbeam x-ray scattering. Polymer 2001, 42, 5257-5266.
27. Alamo, R.G.; Kim, M.H.; Galante, M.J.; Isasi, J.R.; Mandelkern, L. Structural and kinetic factors governing the formation of the γ polymorph of isotactic polypropylene. Macromolecules 1999, 32, 4050-4064.