Online citations, reference lists, and bibliographies.
← Back to Search

On The Structure And Nucleation Mechanism In Nucleated Isotactic Polypropylene Crystallized Under High Pressure

P. Sowinski, E. Piórkowska, S. A. Boyer, Jean-Marc Haudin
Published 2018 · Materials Science

Save to my Library
Download PDF
Analyze on Scholarcy
Share
Abstract Nucleating agents used for the monoclinic α-form of isotactic polypropylene (PP), commonly occurring under atmospheric pressure, are able to nucleate its crystallization in the orthorhombic γ-form under high pressure. Nucleation of γ-lamellae is possible through epitaxy involving (001)γ crystallographic plane on substrates nucleating the α-form through epitaxy engaging (010)α plane because of equivalency of both planes. Another possibility is nucleation of α-lamellae through epitaxy involving either (010)α or (110)α plane, and formation of the γ-phase through γ/α epitaxy. The study focuses on the structure and mechanism of nucleation of high pressure crystallization of PP with selected nucleating agents: poly(tetrafluoroethylene) particles, commercial Hyperform HPN-20E and ADK Stab NA11UH. The nucleated PP was isothermally crystallized in the γ-form under pressure of 200 and 300 MPa and studied ex-situ by WAXD, PLM and SEM. Analysis of lamellar structure provided insight into the nucleation mechanism of high pressure crystallization of PP. In all the materials the α-lamellae were nucleated first and served as seeds for the γ-form.
This paper references
10.1021/MA00220A014
γ-Isotactic polypropylene. A structure with nonparallel chain axes
S. V. Meille (1990)
10.1002/MACP.1994.021950426
The influence of regio‐ and stereoirregularities on the crystallization behaviour of isotactic poly(propylene)s prepared with homogeneous group IVa metallocene/methylaluminoxane Ziegler‐Natta catalysts
D. Fischer (1994)
10.1016/S0032-3861(00)00404-3
Competition between α and γ phases in isotactic polypropylene : effects of ethylene content and nucleating agents at different cooling rates
T. Foresta (2001)
10.1021/MA051004X
Crystallization Behavior and Mechanical Properties of Regiodefective, Highly Stereoregular Isotactic Polypropylene: Effect of Regiodefects versus Stereodefects and Influence of the Molecular Mass
C. Rosa (2005)
10.1016/S0032-3861(00)00062-8
“Multiple” nucleation of the (010) contact face of isotactic polypropylene, α phase
C. Mathieu (2000)
10.1016/0032-3861(91)90185-L
Single crystals of γ phase isotactic polypropylene: combined diffraction and morphological support for a structure with non-parallel chains
B. Lotz (1991)
10.1016/0032-3861(71)90031-0
Development of the γ-crystal form in random copolymers of propylene and their analysis by dsc and x-ray methods
A. Turner‐Jones (1971)
10.1016/S0032-3861(97)00131-6
The γ-phase of high molecular weight isotactic polypropylene. II: The morphology of the γ-form crystallized at 200 MPa
K. Mezghani (1997)
10.1021/MA0605907
Plastic Deformation of the γ Phase in Isotactic Polypropylene in Plane-Strain Compression
E. Lezak (2006)
10.1016/J.MECHMAT.2013.05.010
The role of dislocations in γ-iPP under plastic deformation investigated by X-ray line profile analysis
Gerald Polt (2013)
10.1002/POLB.1986.090240909
Crystal morphology of the γ (triclinic) phase of isotactic polypropylene and its relation to the α phase
B. Lotz (1986)
10.1007/s00396-012-2686-y
High-pressure crystallization of isotactic polypropylene droplets
Kinga Zapala (2012)
10.1016/S0032-3861(00)00675-3
Influence of stereoirregularities on the formation of the γ-phase in isotactic polypropene
R. Thomann (2001)
10.1021/MA991813E
Crystallization of Isotactic Polypropylene under High Pressure (γ Phase)
C. Angelloz (2000)
10.1016/0032-3861(95)97341-C
γ-Phase in propylene copolymers at atmospheric pressure
K. Mezghani (1995)
10.1016/0032-3861(96)85852-6
The occurrence of the γ-phase in injection moulded polypropylene in relation to the processing conditions
G. Kalay (1996)
10.1021/MA951885F
On the γ-Phase of Isotactic Polypropylene
R. Thomann (1996)
10.1016/S0032-3861(99)00310-9
A novel epitaxy of isotactic polypropylene (α phase) on PTFE and organic substrates
S. Yan (2000)
10.1002/POL.1967.110050307
Solution‐grown lamellar crystals of thermally decomposed isotactic polypropylene
M. Kojima (1967)
10.1021/MA035295Q
Comparison between Polymorphic Behaviors of Ziegler−Natta and Metallocene-Made Isotactic Polypropylene: The Role of the Distribution of Defects in the Polymer Chains
C. Rosa (2004)
10.1016/S0032-3861(98)00291-2
Obtaining the γ phase in isotactic polypropylene: effect of catalyst system and crystallization conditions
E. Pérez (1999)
10.1063/1.1655891
Crystallization of Low‐Molecular‐Weight Polypropylene Fractions
D. Morrow (1968)
10.1002/MACP.1986.021870812
Composition-properties relationships in propene-ethene random copolymers obtained with high-yield Ziegler-natta supported catalysts
M. Avella (1986)
10.1016/0032-3861(93)90385-N
Shear-induced crystallization of isotactic polypropylene melts: isothermal WAXS experiments with synchrotron radiation
J. Moitzi (1993)
10.1016/J.EURPOLYMJ.2010.04.021
Nucleation of crystallization in isotactic polypropylene and polyoxymethylene with poly(tetrafluoroethylene) particles
Robert Masirek (2010)
10.1016/S0032-3861(01)00510-9
Epitaxial act of sodium 2,2′-methylene-bis-(4,6-di-t-butylphenylene)phosphate on isotactic polypropylene
Shiho Yoshimoto (2001)
10.1016/0014-3057(85)90226-5
Physico-chemical and structural characterization of ethylene-propene copolymers with low ethylene content from isotactic-specific Ziegler-Natta catalysts
V. Busico (1985)
10.1002/MACP.200600288
Thermal Behavior, Structure and Morphology of Propene/Higher 1‐Olefin Copolymers
P. Stagnaro (2006)
10.1021/MA020648R
Crystallization of Metallocene-Made Isotactic Polypropylene: Disordered Modifications Intermediate between the α and γ Forms
F. Auriemma (2002)
10.1002/POLB.10309
Specificity and versatility of nucleating agents toward isotactic polypropylene crystal phases
C. Mathieu (2002)
10.1007/s00396-014-3445-z
The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene
P. Sowiński (2014)
10.1002/MACP.1989.021901112
Crystallization of the γ-form of isotactic poly(propylene)
A. Marigo (1989)
10.1002/POL.1977.180150405
Studies on the α and β forms of isotactic polypropylene by crystallization in a temperature gradient
A. J. Lovinger (1977)
10.1016/J.EURPOLYMJ.2016.08.002
Crystallization kinetics of polymer fibrous nanocomposites
S. Galeski (2016)
10.1002/POL.1979.180170406
A permanganic etchant for polyolefines
R. H. Olley (1979)
10.1016/J.EURPOLYMJ.2008.05.010
Effect of the nucleating agent 1,3:2,4-di(3,4-dimethylbenzylidene) sorbitol on the γ phase content of propylene/ethylene copolymer
Q. Shi (2008)
10.1016/J.POLYMER.2004.02.071
Lamellar morphology of random metallocene propylene copolymers studied by atomic force microscopy
Ian L. Hosier (2004)
10.1021/MA030157M
Formation of the α and γ polymorphs in random metallocene-propylene copolymers. Effect of concentration and type of comonomer
Ian L. Hosier (2003)
10.1007/978-94-011-0567-5_3
Crystallization, melting and supermolecular structure of isotactic polypropylene
J. Varga (1995)
10.1038/340455A0
Non-parallel chains in crystalline γ-isotactic polypropylene
S. V. Meille (1989)
10.1021/MA981849R
Structural and Kinetic Factors Governing the Formation of the γ Polymorph of Isotactic Polypropylene
R. Alamo (1999)
10.1016/J.EURPOLYMJ.2016.10.055
Nucleation of crystallization of isotactic polypropylene in the gamma form under high pressure in nonisothermal conditions
P. Sowiński (2016)
10.1016/S0032-3861(97)10121-5
The γ-phase of high molecular weight isotactic polypropylene: III. The equilibrium melting point and the phase diagram
K. Mezghani (1998)
10.1021/CM071502F
Tailoring the Physical Properties of Isotactic Polypropylene through Incorporation of Comonomers and the Precise Control of Stereo- and Regioregularity by Metallocene Catalysts
C. Rosa (2007)
10.1016/0014-3057(83)90144-1
Structure-properties relationships in some random copolymers of propylene
G. Guidetti (1983)
10.1002/POL.1966.160040509
Structure of pressure‐crystallized polypropylene
J. Kardos (1966)
10.1021/MA0116248
Crystallization of the α and γ Forms of Isotactic Polypropylene as a Tool To Test the Degree of Segregation of Defects in the Polymer Chains
C. Rosa (2002)



This paper is referenced by
Semantic Scholar Logo Some data provided by SemanticScholar