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The βα Growth Transition Of Isotactic Polypropylene During Stepwise Crystallization At Elevated Temperature

Jiying Wang, Z. Ren, X. Sun, H. Li, S. Yan
Published 2015 · Materials Science

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Growth transition from β-isotactic polypropylene (iPP) to its α phase during the stepwise crystallization process is investigated. β-iPP hexagonites and spherulites are prepared first at 135 °C by using pimelic calcium as a nucleation agent, and transformation of them to their α-counterparts is realized by continuous isothermal crystallization at elevated temperatures, e.g., 151 °C. The β to α growth transition regions are investigated by optical and scanning electron microscopies. The results show that β-iPP hexagonites and spherulites grow in thin and thick films, respectively, while α-iPP spherulites are always observed in both thin and thick films. After abrupt temperature jump from 135 to 151 °C, α-iPP spherulites grow continuously with edge-on lamellae extending smoothly from the region crystallized at 135 °C to the area grown at 151 °C. On the contrary, the growth of the β-iPP crystals stops. At the growth front of β-iPP crystals, α-iPP crystallization takes place via nucleation and subsequent crystal growth, leading to sporadically dispersed α-iPP crystals around the growth front of β-iPP crystals. The similar structure of the transformed α-iPP crystals with that produced directly by isothermal crystallization at 151 °C also supports this conclusion. Moreover, the same cross-hatched lamellar structure of α-iPP in contact with both the flat-on and edge-on β-iPP lamellae demonstrates that there is no fixed structure relationship between the newly formed α- and the original β-iPP crystals.
This paper references
10.1007/BF01031851
Characterization of superheatable flow-induced polymer crystals by optical microscopy
D. Grubb (1975)
10.1063/1.1734986
Evidence for a Second Crystal Form of Polypropylene
H. Keith (1959)
10.1016/J.POLYMER.2008.04.012
A highly active novel -nucleating agent for isotactic polypropylene
Shicheng Zhao (2008)
10.6028/JRES.070A.006
The Spherulitic Crystallization of Isotactic Polypropylene From Solution: On the Evolution of Monoclinic Spherulites From Dendritic Chain-Folded Crystal Precursors.
F. Khoury (1966)
10.1002/MACP.1964.020750113
Crystalline forms of isotactic polypropylene
A. T. Jones (1964)
10.1016/0032-3861(68)90006-2
Morphology of polypropylene crystallized from the melt
F. L. Binsbergen (1968)
10.1002/POLB.1986.090240301
Studies on the β‐crystalline form of isotactic polypropylene
P. Jacoby (1986)
10.1021/MA971345D
Epitaxial Crystallization and AFM Investigation of a Frustrated Polymer Structure: Isotactic Poly(propylene), β Phase
W. Stocker (1998)
10.1038/340455A0
Non-parallel chains in crystalline γ-isotactic polypropylene
S. V. Meille (1989)
10.1002/POLB.10309
Specificity and versatility of nucleating agents toward isotactic polypropylene crystal phases
C. Mathieu (2002)
10.1016/S0032-3861(00)00919-8
Shear-induced crystallization of isotactic polypropylene with different molecular weight distributions: in situ small- and wide-angle X-ray scattering studies
A. Nogales (2001)
10.1002/POLB.1986.090240712
The molecular origin of lamellar branching in the α (monoclinic) form of isotactic polypropylene
B. Lotz (1986)
10.1002/MACP.1993.021940123
Melting behavior and crystalline order of ß‐crystalline phase poly(propylene)
G. Shi (1993)
10.1081/MB-120013089
β-MODIFICATION OF ISOTACTIC POLYPROPYLENE: PREPARATION, STRUCTURE, PROCESSING, PROPERTIES, AND APPLICATION
J. Varga (2002)
10.1002/MACP.1989.021900423
Plastic deformation and solid-phase transformation in β-phase polypropylene
史观一 (1989)
10.1016/S0032-3861(98)00144-X
On the deformation mechanisms of β-polypropylene: 1. Effect of necking on β-phase PP crystals
J. Li (1998)
10.1016/0032-3861(89)90004-9
On the development of polypropylene spherulites
R. H. Olley (1989)
10.1002/POL.1959.1203913504
Conformation of linear chains and their mode of packing in the crystal state
G. Natta (1959)
10.1016/S0032-3861(98)00345-0
A study on the heat of fusion of β-polypropylene
J. Li (1999)
Polymer 42 : 5247 – 5256 3
A Nogales (1996)
10.1016/0032-3861(81)90182-8
Influence of additives on the structure and properties of polymers: 2. Polymorphic transitions of isotactic polypropylene caused by aminosulphur compounds
J. Garbarczyk (1981)
10.1007/BF00296241
Direct evidence of row-nucleated cylindritic crystallization in glass fiber-reinforced polypropylene composites
J. Varga (1993)
10.1007/978-94-011-0567-5_3
Crystallization, melting and supermolecular structure of isotactic polypropylene
J. Varga (1995)
βα-BIFURCATION OF GROWTH DURING THE SPHERULITIC CRYSTALLIZATION OF POLYPROPYLENE
J. Varga (1990)
10.1007/s10118-013-1311-y
Combined effect of modified zeolite 13X and β-nucleating agent on improving β-crystal content and toughening polypropylene random copolymer
J. Leng (2013)
10.1007/BF00540671
Supermolecular structure of isotactic polypropylene
J. Varga (1992)
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/S003960050113
High-temperature hedritic crystallization of the β-modification of isotactic polypropylene
J. Varga (1997)
10.1016/S0032-3861(98)00412-1
On deformation mechanisms of β-polypropylene 2. Changes of lamellar structure caused by tensile load
J. Li (1999)
10.1007/BF00665636
Experimental study of shear-induced crystallization of an impact polypropylene copolymer
C. Tribout (1996)
10.1021/MA702725G
Initial Stage of iPP β to α Growth Transition Induced by Stepwise Crystallization
H. Li (2008)
10.1002/(SICI)1097-4628(19991205)74:10<2357::AID-APP3>3.0.CO;2-2
Highly active thermally stable β-nucleating agents for isotactic polypropylene
J. Varga (1999)
10.1002/POL.1977.180151008
Shear‐induced β‐form crystallization in isotactic polypropylene
H. Dragaun (1977)
Polym Bull 30:105–110
J Varga (1993)
10.1007/s10118-013-1269-9
Application of electron diffraction in the structure characterization of polymer crystals
Jiang Wu (2013)
10.1081/MB-120013059
MOLECULAR ASPECTS OF STRUCTURE AND MORPHOLOGY OF ISOTACTIC POLYPROPYLENE
B. Lotz (2002)
10.1021/MA0521102
Effect of Fiber Molecular Weight on the Interfacial Morphology of iPP Fiber/Matrix Single Polymer Composites
Xuping Sun (2006)
10.1063/1.1707968
Crystallization in Thin Films of Isotactic Polypropylene
F. J. Padden (1966)
10.1016/0032-3861(96)00370-9
Structure and morphology of poly(propylenes): a molecular analysis
B. Lotz (1996)
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)



This paper is referenced by
10.1021/acs.cgd.8b00254
Cross-Nucleation between Polymorphs: Quantitative Modeling of Kinetics and Morphology
S. F. Looijmans (2018)
10.3390/polym10050556
Polymorphic Behavior and Phase Transition of Poly(1-Butene) and Its Copolymers
Rui Xin (2018)
10.1002/PI.5595
Differential scanning calorimetry study of cross‐nucleation between polymorphs in isotactic poly(1‐butene)
B. Wang (2019)
10.1002/PCR2.10052
Stretching behavior of the butene‐1/ethylene random copolymer: A direct correspondence between triggering of II‐I phase transition and mechanical yielding
W. Wang (2019)
10.1002/pcr2.10104
Cross‐nucleation of polybutene‐1 Form II on Form I seeds with different morphology
W. Wang (2020)
10.15167/WANG-BAO_PHD2020-03-20
Heterogeneous Nucleation in Semicrystalline Polymers
B. Wang (2020)
10.1049/iet-nde.2020.0003
Charge trapped mechanism for semi-crystalline polymer electrets: quasi-dipole model
Gang-jin Chen (2020)
10.1007/s10118-020-2477-8
Effect of Different Shear Modes on Morphology and Mechanical Properties of Polypropylene Pipes Produced by Rotational Shear
Wei-Chen Zhou (2020)
10.1021/ACS.CGD.7B00872
Anomalous temperature dependence of isotactic polypropylene α-on-β cross-nucleation kinetics
S. F. Looijmans (2017)
10.1021/ACS.CGD.7B00148
Cross-Nucleation between Concomitantly Crystallizing α- and γ-Phases in Polypivalolactone: Secondary Nucleation of One Polymorph on Another
D. Cavallo (2017)
10.1021/ACS.MACROMOL.6B01123
Flow-Induced Dendritic β-Form Isotactic Polypropylene Crystals in Thin Films
Bin Zhang (2016)
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