The Experts below are selected from a list of 44697 Experts worldwide ranked by ideXlab platform
Roberto Scaffaro - One of the best experts on this subject based on the ideXlab platform.
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Degradation of Polymer Blends: A brief review
Polymer Degradation and Stability, 2017Co-Authors: Francesco Paolo La Mantia, Manuela Ceraulo, Maria Chiara Mistretta, Luigi Botta, Mary Morreale, Roberto ScaffaroAbstract:The usefulness of any material, including Polymer Blends, depends on its degradability and durability. The blend composition can significantly affect the degradative behavior of a Polymer blend and can differ from the degradation routes of the pure components since the interactions among different species in the Blends during degradation, and among the degradation products, can occur. These reactions can lead either to an acceleration of the degradation rate or to a stabilizing effect in comparison with the pure components. Thus, the additive rule cannot be often applied in case of degradation of Polymer Blends and, therefore, it is difficult to predict the degradative behavior of a Polymer blend on the base of the properties of pure components. This review aims to report the status of the research on degradation of Polymer Blends focusing on thermal, thermomechanical and photo-oxidative degradation.
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Nanofilled Thermoplastic–Thermoplastic Polymer Blends
Nanostructured Polymer Blends, 2014Co-Authors: Roberto Scaffaro, Luigi BottaAbstract:Nanofillers can play two important roles in Polymer Blends. The first is the improvement of various properties such as mechanical, barrier, thermal, flame retardancy, and electrical properties. The second is the modification of miscibility/compatibility and morphology of Polymer Blends. The mechanism of action of nanoparticles to modify the morphology, interfacial properties, and performance of immiscible Polymer Blends relies on their localization, their interactions with Polymer components, and the way these additives disperse within the Polymer blend. The objective of this chapter is to review the research on nanofilled thermoplastic/thermoplastic Polymer Blends, paying particular attention both to the distribution of nanoparticles inside a binary Polymer blend and to the effect of nanofillers on the morphology and on the properties of the thermoplastic Polymer Blends. In a large majority of cases, thermoplastic Polymer Blends filled with nanoparticles show better compatibility in terms of morphology size than pure Blends. Moreover, the formation of a cocontinuous structure is promoted by the presence of the nanofiller.
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Nanofilled Thermoplastic-Thermoplastic Polymer Blends
Nanostructured Polymer Blends, 2013Co-Authors: Roberto Scaffaro, Luigi BottaAbstract:Nanofillers can play two important roles in Polymer Blends. The first is the improvement of various properties such as mechanical, barrier, thermal, flame retardancy, and electrical properties. The second is the modification of miscibility/compatibility and morphology of Polymer Blends. The mechanism of action of nanoparticles to modify the morphology, interfacial properties, and performance of immiscible Polymer Blends relies on their localization, their interactions with Polymer components, and the way these additives disperse within the Polymer blend. The objective of this chapter is to review the research on nanofilled thermoplastic/thermoplastic Polymer Blends, paying particular attention both to the distribution of nanoparticles inside a binary Polymer blend and to the effect of nanofillers on the morphology and on the properties of the thermoplastic Polymer Blends. In a large majority of cases, thermoplastic Polymer Blends filled with nanoparticles show better compatibility in terms of morphology size than pure Blends. Moreover, the formation of a cocontinuous structure is promoted by the presence of the nanofiller.
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Degradation Behavior of Nanocomposite Polymer Blends
Nanostructured Polymer Blends, 2013Co-Authors: Roberto Scaffaro, Luigi BottaAbstract:The usefulness of any material, including nanocomposite Polymer Blends, depends on its degradability and durability. Thus, this chapter reviews the status of the research on degradation of nanocomposite Polymer Blends and, in particular, on clay-nanocomposite Polymer Blends, paying particular attention to both the role of the filler and the role of the blend morphology and composition. The results of recent research indicate that the clay has two opposing effects on the thermal stability of a nanocomposite Polymer blend: (1) a promoter effect of the Polymer matrix degradation, which decreases the thermal stability, and (2) a barrier effect, which improves the thermal stability. Moreover, the presence of organoclays generally reduces the photostability of nanocomposite Polymer Blends. Despite the effect of the filler, blend morphology and blend composition can significantly affect, either positively or negatively, the degradation behavior of the Polymer blend nanocomposites.
Luigi Botta - One of the best experts on this subject based on the ideXlab platform.
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Degradation of Polymer Blends: A brief review
Polymer Degradation and Stability, 2017Co-Authors: Francesco Paolo La Mantia, Manuela Ceraulo, Maria Chiara Mistretta, Luigi Botta, Mary Morreale, Roberto ScaffaroAbstract:The usefulness of any material, including Polymer Blends, depends on its degradability and durability. The blend composition can significantly affect the degradative behavior of a Polymer blend and can differ from the degradation routes of the pure components since the interactions among different species in the Blends during degradation, and among the degradation products, can occur. These reactions can lead either to an acceleration of the degradation rate or to a stabilizing effect in comparison with the pure components. Thus, the additive rule cannot be often applied in case of degradation of Polymer Blends and, therefore, it is difficult to predict the degradative behavior of a Polymer blend on the base of the properties of pure components. This review aims to report the status of the research on degradation of Polymer Blends focusing on thermal, thermomechanical and photo-oxidative degradation.
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Nanofilled Thermoplastic–Thermoplastic Polymer Blends
Nanostructured Polymer Blends, 2014Co-Authors: Roberto Scaffaro, Luigi BottaAbstract:Nanofillers can play two important roles in Polymer Blends. The first is the improvement of various properties such as mechanical, barrier, thermal, flame retardancy, and electrical properties. The second is the modification of miscibility/compatibility and morphology of Polymer Blends. The mechanism of action of nanoparticles to modify the morphology, interfacial properties, and performance of immiscible Polymer Blends relies on their localization, their interactions with Polymer components, and the way these additives disperse within the Polymer blend. The objective of this chapter is to review the research on nanofilled thermoplastic/thermoplastic Polymer Blends, paying particular attention both to the distribution of nanoparticles inside a binary Polymer blend and to the effect of nanofillers on the morphology and on the properties of the thermoplastic Polymer Blends. In a large majority of cases, thermoplastic Polymer Blends filled with nanoparticles show better compatibility in terms of morphology size than pure Blends. Moreover, the formation of a cocontinuous structure is promoted by the presence of the nanofiller.
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Nanofilled Thermoplastic-Thermoplastic Polymer Blends
Nanostructured Polymer Blends, 2013Co-Authors: Roberto Scaffaro, Luigi BottaAbstract:Nanofillers can play two important roles in Polymer Blends. The first is the improvement of various properties such as mechanical, barrier, thermal, flame retardancy, and electrical properties. The second is the modification of miscibility/compatibility and morphology of Polymer Blends. The mechanism of action of nanoparticles to modify the morphology, interfacial properties, and performance of immiscible Polymer Blends relies on their localization, their interactions with Polymer components, and the way these additives disperse within the Polymer blend. The objective of this chapter is to review the research on nanofilled thermoplastic/thermoplastic Polymer Blends, paying particular attention both to the distribution of nanoparticles inside a binary Polymer blend and to the effect of nanofillers on the morphology and on the properties of the thermoplastic Polymer Blends. In a large majority of cases, thermoplastic Polymer Blends filled with nanoparticles show better compatibility in terms of morphology size than pure Blends. Moreover, the formation of a cocontinuous structure is promoted by the presence of the nanofiller.
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Degradation Behavior of Nanocomposite Polymer Blends
Nanostructured Polymer Blends, 2013Co-Authors: Roberto Scaffaro, Luigi BottaAbstract:The usefulness of any material, including nanocomposite Polymer Blends, depends on its degradability and durability. Thus, this chapter reviews the status of the research on degradation of nanocomposite Polymer Blends and, in particular, on clay-nanocomposite Polymer Blends, paying particular attention to both the role of the filler and the role of the blend morphology and composition. The results of recent research indicate that the clay has two opposing effects on the thermal stability of a nanocomposite Polymer blend: (1) a promoter effect of the Polymer matrix degradation, which decreases the thermal stability, and (2) a barrier effect, which improves the thermal stability. Moreover, the presence of organoclays generally reduces the photostability of nanocomposite Polymer Blends. Despite the effect of the filler, blend morphology and blend composition can significantly affect, either positively or negatively, the degradation behavior of the Polymer blend nanocomposites.
Guohua Chen - One of the best experts on this subject based on the ideXlab platform.
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The electrical properties of graphite nanosheet filled immiscible Polymer Blends
Materials Chemistry and Physics, 2007Co-Authors: Guohua Chen, Jingrong Lu, Dajun WuAbstract:The electrical properties in graphite nanosheet (GN) filled Polymer Blends which are immiscible with each other were studied as a function of the Polymer's blend ratio. The electrical conductivity of Polymer Blends is found to be determined by two factors: the double percolation effect and the crystalline change of the Polymer Blends. The SEM micrographs show that GN preferientially distributed unevenly in high-density polyethylene (HDPE). The selective localization of GN in polyblend is also closely related to the crystalline change of Polymer blend. The degree of crystallinity of composite is different at different Polymer's blend ratio and thereby influences the localization of GN in the polyblend. The piezoresistive behavior of immiscible conductive Blends was investigated to gain better understanding of relationship between morphology and electrical conductivity.
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The electrical properties of graphite nanosheet filled immiscible Polymer Blends
Materials Chemistry and Physics, 2007Co-Authors: Guohua ChenAbstract:The electrical properties in graphite nanosheet (GN) filled Polymer Blends which are immiscible with each other were studied as a function of the Polymer's blend ratio. The electrical conductivity of Polymer Blends is found to be determined by two factors: the double percolation effect and the crystalline change of the Polymer Blends. The SEM micrographs show that GN preferientially distributed unevenly in high-density polyethylene (HDPE). The selective localization of GN in polyblend is also closely related to the crystalline change of Polymer blend. The degree of crystallinity of composite is different at different Polymer's blend ratio and thereby influences the localization of GN in the polyblend. The piezoresistive behavior of immiscible conductive Blends was investigated to gain better understanding of relationship between morphology and electrical conductivity.
Satoshi Kubo - One of the best experts on this subject based on the ideXlab platform.
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Lignin-based Polymer Blends: analysis of intermolecular interactions in lignin–synthetic Polymer Blends
Composites Part A-applied Science and Manufacturing, 2004Co-Authors: John F. Kadla, Satoshi KuboAbstract:Abstract The development of lignin-based thermoplastics relies on altering the viscoelastic properties of lignin through chemical modification or Polymer blending. In Polymer Blends, miscibility is dependent on the occurrence of exothermic reactions such as hydrogen-bonding, acid–base interactions and the like. The effects of Polymer–Polymer interactions, specifically hydrogen-bonding, on lignin-based thermoplastics was studied in a series of lignin/synthetic Polymer Blends prepared by melt extrusion. Thermal analysis revealed miscible blend behavior in the lignin Blends containing PEO and PET, whereas the PVA and PP lignin Blends appeared immiscible. The glass transition ( T g ) of the lignin/PEO and lignin/PET Blends showed a negative deviation from a linear mixing rule, indicative of specific intermolecular interactions. DRFT-IR analysis revealed the formation of a strong intermolecular hydrogen bond between lignin and PEO, but not with PET.
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lignin based Polymer Blends analysis of intermolecular interactions in lignin synthetic Polymer Blends
Composites Part A-applied Science and Manufacturing, 2004Co-Authors: John F. Kadla, Satoshi KuboAbstract:Abstract The development of lignin-based thermoplastics relies on altering the viscoelastic properties of lignin through chemical modification or Polymer blending. In Polymer Blends, miscibility is dependent on the occurrence of exothermic reactions such as hydrogen-bonding, acid–base interactions and the like. The effects of Polymer–Polymer interactions, specifically hydrogen-bonding, on lignin-based thermoplastics was studied in a series of lignin/synthetic Polymer Blends prepared by melt extrusion. Thermal analysis revealed miscible blend behavior in the lignin Blends containing PEO and PET, whereas the PVA and PP lignin Blends appeared immiscible. The glass transition ( T g ) of the lignin/PEO and lignin/PET Blends showed a negative deviation from a linear mixing rule, indicative of specific intermolecular interactions. DRFT-IR analysis revealed the formation of a strong intermolecular hydrogen bond between lignin and PEO, but not with PET.
John F. Kadla - One of the best experts on this subject based on the ideXlab platform.
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Lignin-based Polymer Blends: analysis of intermolecular interactions in lignin–synthetic Polymer Blends
Composites Part A-applied Science and Manufacturing, 2004Co-Authors: John F. Kadla, Satoshi KuboAbstract:Abstract The development of lignin-based thermoplastics relies on altering the viscoelastic properties of lignin through chemical modification or Polymer blending. In Polymer Blends, miscibility is dependent on the occurrence of exothermic reactions such as hydrogen-bonding, acid–base interactions and the like. The effects of Polymer–Polymer interactions, specifically hydrogen-bonding, on lignin-based thermoplastics was studied in a series of lignin/synthetic Polymer Blends prepared by melt extrusion. Thermal analysis revealed miscible blend behavior in the lignin Blends containing PEO and PET, whereas the PVA and PP lignin Blends appeared immiscible. The glass transition ( T g ) of the lignin/PEO and lignin/PET Blends showed a negative deviation from a linear mixing rule, indicative of specific intermolecular interactions. DRFT-IR analysis revealed the formation of a strong intermolecular hydrogen bond between lignin and PEO, but not with PET.
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lignin based Polymer Blends analysis of intermolecular interactions in lignin synthetic Polymer Blends
Composites Part A-applied Science and Manufacturing, 2004Co-Authors: John F. Kadla, Satoshi KuboAbstract:Abstract The development of lignin-based thermoplastics relies on altering the viscoelastic properties of lignin through chemical modification or Polymer blending. In Polymer Blends, miscibility is dependent on the occurrence of exothermic reactions such as hydrogen-bonding, acid–base interactions and the like. The effects of Polymer–Polymer interactions, specifically hydrogen-bonding, on lignin-based thermoplastics was studied in a series of lignin/synthetic Polymer Blends prepared by melt extrusion. Thermal analysis revealed miscible blend behavior in the lignin Blends containing PEO and PET, whereas the PVA and PP lignin Blends appeared immiscible. The glass transition ( T g ) of the lignin/PEO and lignin/PET Blends showed a negative deviation from a linear mixing rule, indicative of specific intermolecular interactions. DRFT-IR analysis revealed the formation of a strong intermolecular hydrogen bond between lignin and PEO, but not with PET.