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

Flow Memory And Stability Of Shear-Induced Nucleation Precursors In Isotactic Polypropylene

D. Cavallo, F. Azzurri, L. Balzano, S. Funari, G. C. Alfonso
Published 2010 · Chemistry

Cite This
Download PDF
Analyze on Scholarcy
Share
The dissolution of flow-induced nucleation precursors in isotactic polypropylene is investigated indirectly by means of in situ rheo-SAXS measurements. The progress of crystallization and the evolution of crystal orientation are recorded in isothermal conditions after a controlled shear step followed by an annealing step of different duration at various melt temperatures. The results confirm that the survival time of shear-induced nucleation precursors is extremely large compared to typical rheological relaxation times and it is longer for the precursors originated at higher shear rate. Most important, we show that the effect of flow on the development of oriented morphologies is lost much earlier than that on the overall crystallization kinetics. A schematic model for precursors’ dissolution involving gradual transformation from row into point-like nuclei is proposed.



This paper is referenced by
10.1039/C6RA27643A
Self-nanofibrillation strategy to an unusual combination of strength and toughness for poly(lactic acid)
Lan Xie (2017)
10.3390/polym8060230
A Phase Field Technique for Modeling and Predicting Flow Induced Crystallization Morphology of Semi-Crystalline Polymers
X. Wang (2016)
10.1021/MA201263Z
Extension Flow Induced Crystallization of Poly(ethylene oxide)
Nan Tian (2011)
10.1021/ACS.MACROMOL.5B01402
Role of Stably Entangled Chain Network Density in Shish-Kebab Formation in Polyethylene under an Intense Flow Field
D. Zhou (2015)
10.1016/j.polymer.2020.123000
Delay of re-entanglement kinetics by shear-induced nucleation precursors in isotactic polypropylene melt
B. Wang (2020)
10.1002/PI.5625
Isothermal crystallization kinetics and subsequent melting behavior of β‐nucleated isotactic polypropylene/graphene oxide composites with different ordered structure
Yansong Yu (2018)
10.1007/s10973-018-7776-8
Effects of ordered structure on non-isothermal crystallization kinetics and subsequent melting behavior of β-nucleated isotactic polypropylene/graphene oxide composites
Yansong Yu (2018)
10.1021/ACS.MACROMOL.5B02688
Flow-Induced Crystallization of Polymers: Molecular and Thermodynamic Considerations
Z. Wang (2016)
10.1021/MZ4005716
Large Amplitude Oscillatory Shear Induces Crystal Chain Orientation in Velocity Gradient Direction
K. Sreenivas (2014)
10.1063/1.4937342
Injection molding of iPP samples in controlled conditions and resulting morphology
Nino Sessa (2015)
10.1016/J.POLYMERTESTING.2013.01.012
Pre-shear induced anomalous distribution of β-form in injection molded iPP
Baobao Chang (2013)
10.1021/SC400040B
Rheologically Determined Critical Shear Rates for Shear-Induced Nucleation Rate Enhancements of Poly(lactic acid)
Y. Zhong (2013)
10.1039/C3SM51799C
Influence of the memory effect of a mesomorphic isotactic polypropylene melt on crystallization behavior
X. Li (2013)
10.1016/J.POLYMER.2012.02.023
Effects of melt structure on shear-induced β-cylindrites of isotactic polypropylene
B. Zhang (2012)
10.1039/C3CE40466H
Shear effects on crystalline structures of poly(L-lactide)
P. Xiao (2013)
10.1021/MA3000384
Effect of Long Chains on the Threshold Stresses for Flow-Induced Crystallization in iPP: Shish Kebabs vs Sausages
Lucia Fernandez-Ballester (2012)
10.1002/PC.24745
Regulating polycrystalline behavior of the β‐nucleated isotactic polypropylene/graphene oxide composites by melt memory effect
Yansong Yu (2019)
10.1002/MACP.201500542
Mechanistic Insights into the Shear‐Induced β‐Form Crystal Formation of iPP
Baojing Luo (2016)
10.1016/J.POLYMER.2014.09.039
Flow induced crystallization in isotactic polypropylene during and after flow
Z. Ma (2014)
10.1016/J.POLYMER.2012.08.003
Quantification of non-isothermal, multi-phase crystallization of isotactic polypropylene: the influence of cooling rate and pressure
Van Drongelen (2012)
10.1678/RHEOLOGY.41.173
Inner Structure and Mechanical Properties of Recycled Polypropylene (故 升田利史郎先生追悼号)
S. Yao (2013)
10.1039/c3cc49668f
Modelling flow-induced crystallisation in polymers.
R. S. Graham (2014)
10.1021/MA2027325
Pressure Quench of flow-induced crystallization precursors
Z. Ma (2012)
10.1021/MA5005293
Flow-Induced Precursors of Isotactic Polypropylene: An in Situ Time and Space Resolved Study with Synchrotron Radiation Scanning X-ray Microdiffraction
Fengmei Su (2014)
10.1021/ACS.MACROMOL.5B01408
Lifetime of Flow-Induced Precursors in Isotactic Polypropylene
Fawzi G. Hamad (2015)
10.1063/1.3681401
Effects of particles on stability of flow-induced precursors.
Peng-wei Zhu (2012)
10.1007/s10965-014-0506-4
Isothermal crystallization behavior of β-nucleated isotactic polypropylene with different melt structures
J. Kang (2014)
10.1016/J.PHYSREP.2018.04.004
The physics of polymer chain-folding
W. Hu (2018)
10.1016/J.POLYMER.2019.121641
Role of lamellar thickening in thick lamellae formation in isotactic polypropylene when crystallizing under flow and pressure
Shu-Gui Yang (2019)
10.1007/s10118-014-1397-x
Combined effects of stretching and nanofillers on the crystalline structure and mechanical properties of polypropylene and single-walled carbon nanotube composite fibers
Yao Gao (2014)
10.1016/j.polymer.2019.122117
The origin of memory effects in the crystallization of polyamides: Role of hydrogen bonding
Xinran Liu (2020)
Relaxation of Shear-Induced Precursors in Isotactic Polypropylene and Random Propylene-Ethylene copolymers
Benjamin Schammé (2013)
See more
Semantic Scholar Logo Some data provided by SemanticScholar