Multilayered core-shell structure of the dispersed phase in high-impact polypropylene

The multiphase morphology of high impact polypropylene (hiPP), which is a reactor blend of polypropylene (PP) with ethylene-propylene copolymer, was investigated by transmission electron microscopy, selected area electron diffraction, atomic force microscopy, and field-emission scanning electron microscopy techniques in conjunction with an analysis of the hiPP composition and chain structure based on solvent fractionation, C-13-NMR, and differential scanning calorimetry measurements.

[1]  A. Djurišić,et al.  Factors affecting phase and height contrast of diblock copolymer PS–b-PEO thin films in dynamic force mode atomic force microscopy , 2005 .

[2]  Yihu Song,et al.  Phase morphology and impact toughness of impact polypropylene copolymer , 2005 .

[3]  H. Radusch,et al.  Phase behavior and mechanical properties of heterophasic polypropylene-ethylene/propylene copolymers systems , 2005 .

[4]  J. J. Iruin,et al.  Morphology of High Impact Polypropylene Particles , 2005 .

[5]  G. Wegner,et al.  Morphology and packing behavior of model ethylene/propylene copolymers with precise methyl branch placement , 2004 .

[6]  B. S. Tanem,et al.  Sample preparation and AFM analysis of heterophase polypropylene systems , 2003 .

[7]  T. McKenna,et al.  Evolution of Particle Morphology During Polymerisation of High Impact Polypropylene , 2003 .

[8]  E. Sirota,et al.  CRYSTALLINE STRUCTURE AND PROPERTIES OF EP AND EB COPOLYMERS BY SOLID-STATE NMR, DSC, AND WAXS , 2002 .

[9]  P. Sozzani,et al.  Low-temperature crystallization of ethylene-ran-propylene copolymers: Conformational rearrangement of sequences during the formation of the aggregates , 2002 .

[10]  H. Nazokdast,et al.  Study on morphology of ternary polymer blends. I. Effects of melt viscosity and interfacial interaction , 2001 .

[11]  T. McKenna,et al.  Study of the kinetics, mass transfer, and particle morphology in the production of high-impact polypropylene , 2001 .

[12]  G. Baruzzi,et al.  On the Mechanism of Polypropene Growth over MgCl2/TiCl4 Catalyst Systems , 2001 .

[13]  Lin-Xian Feng,et al.  Structure and properties of polypropylene/poly(ethylene-co-propylene) in-situ blends synthesized by spherical Ziegler–Natta catalyst , 2001 .

[14]  A. Lesser,et al.  Crystallinity and mechanical behavior evolution in ethylene-propylene random copolymers , 2001 .

[15]  M. Pegoraro,et al.  Structure and morphology of a novel ethylene-propylene copolymer and its blends with poly(propylene) , 2000 .

[16]  W. Jianmin,et al.  Structure and properties of impact copolymer polypropylene. II. Phase structure and crystalline morphology , 1999 .

[17]  W. Jianmin,et al.  Structure and properties of impact copolymer polypropylene. I. Chain structure , 1999 .

[18]  W. Ray,et al.  Morphological development of impact polypropylene produced in gas phase with a TiCl4/MgCl2 catalyst , 2001 .

[19]  R. Mülhaupt,et al.  Influence of morphology on the toughening mechanisms of polypropylene modified with core-shell particles derived from thermoplastic elastomers. , 1998 .

[20]  Lin-Xian Feng,et al.  Separation and identification of ethylene-propylene block copolymer , 1997 .

[21]  C. Bucknall,et al.  Mechanisms of cavitation over a range of temperatures in rubber-toughened PSAN modified with three-stage core-shell particles , 1997 .

[22]  D. Meier,et al.  Prediction and manipulation of the phase morphologies of multiphase polymer blends: II. Quaternary systems , 1997 .

[23]  G. Michler,et al.  Relationship between morphology and micromechanical toughening mechanisms in modified polypropylenes , 1996 .

[24]  V. Divjaković,et al.  Effect of addition of polyethylene on properties of polypropylene/ethylene-propylene rubber blends , 1996 .

[25]  F. Mirabella.  Phase separation and the kinetics of phase coarsening in commercial impact polypropylene copolymers , 1994 .

[26]  F. Mirabella.  Impact polypropylene copolymers: fractionation and structural characterization , 1993 .

[27]  T. Usami,et al.  Characterization of impact-resistant poly(propylene–ethylene) copolymers by 13C nuclear magnetic resonance spectroscopy, temperature-rising elution fractionation–size exclusion chromatography, and transmission electron microscopy , 1993 .

[28]  Y. Mizutani,et al.  Annealing of commercial block polypropylene. I. Thermal and physical properties , 1992 .

[29]  Zhiliu Feng,et al.  Epitaxial crystallization of high-density polyethylene on polypropylene in solution-cast films , 1991, Journal of Materials Science.

[30]  P. Galli,et al.  Continuing initiator system developments provide a new horizon for polyolefin quality and properties , 1991 .

[31]  V. H. Watkins,et al.  Effect of interfacial forces on polymer blend morphologies , 1988 .

[32]  Y. Mizutani,et al.  Annealing of polypropylene/poly(ethylene-co-propylene) blend. II. Influence of the structure and properties of poly(ethylene-co-propylene) and blended polyethylene on impact strength , 1985 .

[33]  M. Miles,et al.  Application of defocus transmission electron microscopy to polymers , 1979 .

[34]  D. Bassett,et al.  A high‐pressure phase of polyethylene and chain‐extended growth , 1974 .