The relationship between structure and properties in titanium dioxide filled polypropylene

Burke, M. A.; Young, Robert J.; Stanford, J. L.

doi:10.1007/bf00343073

Cited by 19 publications

(14 citation statements)

References 7 publications

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“…This trend was attributed to the adsorption of polymer chains on filler surfaces, which increased the viscosity and consequently decreased the transport of crystallizable segments to the crystal growth front. In contrast, Burke et al observed an increase in the crystallization rate of TiO 2 ‐filled PP, but they did not find any change in the spherulite growth rate 8. Similar results were obtained by Raimo et al in which the addition of TiO 2 particles to ethylene‐propylene copolymer promoted the nucleation 9.…”

Section: Introductionsupporting

confidence: 57%

Isothermal crystallization of polyethylene oxide/silver nanoplate composites

Rahmansyah

Syu

et al. 2011

J of Applied Polymer Sci

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This research was accomplished to investigate the kinetics of isothermal crystallization of polyethylene oxide (PEO)/silver nanoplate composites. It was obtained that the spherulites increased in size and numbers with time for the composites with various particle loadings. Additionally, the spherulite growth rate of composites decreased with an increase in the crystallization temperature and increased with the addition of nanoplates. The spherulite growth rate was further analyzed by the theory developed by Lauritzen and Hoffman. The product of the lateral surface free energy (r) and the end surface free energy (r e ) decreased with an increase in the content of nanoplates. We proposed the possible crystallization mechanisms of these PEO/nanoplate composites according to the change of r and r e with the presence of nanoplates. A controlled experiment showed a minor change in PEO crystallization with the presence of a surfactant C 16 TAB. This implied that the unique size and shape of nanoplates plays a key role on hindering the primary nucleation of PEO and increasing the spherulite growth rate.

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Section: Introductionsupporting

confidence: 57%

Isothermal crystallization of polyethylene oxide/silver nanoplate composites

Rahmansyah

Syu

et al. 2011

J of Applied Polymer Sci

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“…Young et al5 measured the radial growth rate of isotactic polypropylene in the presence of 2.5 wt % of TiO 2 particles without observing any variation in the growth rate of spherulites relative to neat polypropylene. The authors therefore assumed that even a TiO 2 percentage as high as 40% would not change the spherulite growth rate.…”

Section: Resultsmentioning

confidence: 99%

Influence of titanium dioxide on crystallization behavior of an ethylene–propylene copolymer

Raimo¹,

Martuscelli²

2003

J of Applied Polymer Sci

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ABSTRACT:Crystallization of an ethylene-propylene copolymer (E/P) filled with diverse weight percentages of titanium dioxide (TiO 2 ) was performed under isothermal and nonisothermal conditions to investigate the influence of the inorganic substance on the nucleation and growth mechanisms of the matrix. The overall and radial crystallization rates of the composite materials were measured using, respectively, differential scanning calorimetry (DSC) and optical microscopy. The nucleation density of E/P spherulites as a function of composition was investigated by scanning electron microscopy (SEM), revealing a nucleating effect of TiO 2 . A comparison between the spherulitic texture of specimens showed a higher fineness of the composites relative to the neat matrix, whereas no changes of surface nucleation density were appreciable among composites within the explored compositional range. The thermal behavior is discussed in the light of the enhanced thermal conductivity of polymer composites, which conciliates the crystallization kinetics of the matrix, analyzed using the Avrami equation, to optical and SEM observations.

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“…TiO 2 is added to a polymeric matrix to particularly modify its electrical, optical and mechanical properties . Although micron‐size TiO 2 particles have been widely used as white pigments in PP , there is a lack of comprehensive information about structure‐properties relationship of PP/TiO 2 nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Morphology and properties of highly filled iPP/TiO₂ nanocomposites

Zohrevand

Ajji

Mighri

2013

Polymer Engineering & Sci

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Nanocomposites based on isotactic polypropylene (iPP) and titanium dioxide (TiO 2 ) nanoparticle containing 1-15 vol% (4.6-45.5 wt%) of the nanoparticle were prepared by the melt blending process. The effect of an anhydride-modified polypropylene as a compatibilizer on dispersion of TiO 2 nanoparticles was assessed using SEM. TGA and DSC analysis were performed to study the thermal properties of the nanocomposites. Crystalline structures of iPP in the presence of TiO 2 were analyzed by XRD. Mechanical properties of the nanoparticles were measured and a micromechanical analysis was applied to quantify interface interaction between the polymer and particle. SEM results revealed improvement of TiO 2 particle dispersion by adding the compatibilizer. It was shown that the thermal stability and crystalline structure of the nanocomposite are significantly affected by the state of particle dispersion. TiO 2 nanoparticles were shown to be strong b-nucleating agents for iPP, especially at concentrations less than 5 vol%. Presence of the b-structure crystals reduced the elastic modulus and yield strength of the nanocomposites. Micromechanical analysis showed enhanced interaction between organic and inorganic phases of the compatibilized nanocomposites. POLYM. ENG. SCI., 54:874-886, 2014.

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The relationship between structure and properties in titanium dioxide filled polypropylene

Cited by 19 publications

References 7 publications

Isothermal crystallization of polyethylene oxide/silver nanoplate composites

Isothermal crystallization of polyethylene oxide/silver nanoplate composites

Influence of titanium dioxide on crystallization behavior of an ethylene–propylene copolymer

Morphology and properties of highly filled iPP/TiO₂ nanocomposites

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The relationship between structure and properties in titanium dioxide filled polypropylene

Cited by 19 publications

References 7 publications

Isothermal crystallization of polyethylene oxide/silver nanoplate composites

Isothermal crystallization of polyethylene oxide/silver nanoplate composites

Influence of titanium dioxide on crystallization behavior of an ethylene–propylene copolymer

Morphology and properties of highly filled iPP/TiO2 nanocomposites

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Morphology and properties of highly filled iPP/TiO₂ nanocomposites