Polypropylene isotactic supermolecular structure

Varga J (1995) Crystallization, melting and supermolecular structure of isotactic PP. In Karger-Kocsis J (ed) Polypropylene structure. Blends and composites, vol 1. Chapman 8c Hall, London, p 56... 

Three different series of binary blends were prepared by mixing hydrogenated oligo (cyclopentadiene) (HOCP), isotactic polypropylene (iPP), and poly(l-butene) (PB-1), alternatively. The influence of the presence of HOCP, on the morphology, crystallization, melting behavior, and supermolecular structure of... 

Supermolecular Structure of Isotactic Polypropylene/Hydrogenated Oligo (Cyclopentadiene) Blends... 

Varga J. (1995). Crystallization, melting and supermolecular structure of isotactic polypropylene. In Polypropylene Structure, Blends and Composities Structure and Morphology Copolymers and Blends Composites, Karger-Kocsis, J., pp. 56-115, Chapman Hall, ISBN 9780412614309, London. 

Neat isotactic polypropylene (iPP) crystallized from melt exhibits spherulitic morphology of the crystalline phase (72,73). In some cases and under very specific conditions, cylindrites, axialites, quadrites, hedrites, and dendrites may be formed of iPP (74). In general, crystallization from quiescent melts results in spherulitic morphology, whereas crystallization fi-om melts subjected to mechanical loads results in cylindrites (75). Crystalline supermolecular structure caused by oriented crystal growth from heterogeneous surfaces is commonly termed transcrystallinity (76). 

Varga, J. and Karger-Kocsis, J. (1996) Rules of supermolecular structure formation in sheared isotactic polypropylene melts, /. Polymer Sci., Part B, Polymer Phys., 34, 657-670. 

Varga J (1992) Supermolecular structure of isotactic polypropylene, J Mater Sci 27 2557-2579. Bledzki A K, Bjekovic R and Passmann D (2006) Monocomposite Schichtwerkstoffe aus Polyprop-ylen und ihre Verarbeitung fUr automobile Unterbodenanwendungen, 3. CTI Fachkonferenz Fahrzeugunterboden, May 15-16, Augsburg, Germany. 

Supermoleculare Structure of Isotactic Polypropylene, Journal of Materials Science, 27 (1992), p. 2557-2579... 

In this review the crystal structure and the super-molecular structure of the most used polyolefins is discussed. In particular the latest papers on the morphology of polyethylene, isotactic and syndiotactic polypropylene, isotactic poly(l-butene), and finally isotactic poly(4-methylpentene-l) are summarized and integrated with the fundamental work on the topic. After a short general introduction, the first part of the chapter is dedicated to the analysis of the order at the molecular level (the crystal structure), and the second part deals with the supermolecular structures. 

Varga J. Review of supermolecular structure of isotactic polypropylene. J Mater Sci 1992 27 2557-2579. 

---