Tailoring of Three‐Phase Crystalline Systems in Isotactic Poly(propylene) | Zendy

Obadal Martin | Zendy; Čermák Roman | Zendy; Stoklasa Karel | Zendy

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Tailoring of Three‐Phase Crystalline Systems in Isotactic Poly(propylene)

Author(s) -

Obadal Martin,

Čermák Roman,

Stoklasa Karel

Publication year - 2005

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.200500272

Subject(s) - tacticity , crystallization , nucleation , materials science , phase (matter) , chemical engineering , polymer chemistry , crystallography , composite material , polymer , organic chemistry , chemistry , polymerization , engineering

Summary: A novel method for the tailoring of unique three‐phase crystalline systems in isotactic poly(propylene) has been proven. It is based on a synergistic application of a specific β ‐nucleating agent and high pressure during crystallization. The formation of a γ phase was supported by elevated pressure and high temperature during crystallization; under these conditions the growth of both β and α phases was significantly suppressed. Nevertheless, during the course of crystallization at lower pressure and/or lower temperatures, strong β ‐nucleation efficiency favored the formation of a β phase.

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