Batch foaming of short carbon fiber reinforced polypropylene composites

Wang, Chuanbao; Ying, Sanjiu

doi:10.1007/s12221-013-0815-y

Cited by 21 publications

(13 citation statements)

References 44 publications

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“…This may be because of the immobilization of the polymer molecules near the surface of the long glass fibers because of various molecular interactions, which increased the T g (LGF(0%)/TPU/PBT/PTW composites: 56.29°C, the LGF(40%)/TPU/PBT/PTW composites: 60.13°C) of the composites. A similar increase in the T g and an increase in the loss modulus of the composites because of the incorporation of the reinforcing fibers were also reported by some authors .…”

Section: Resultsmentioning

confidence: 84%

“…In terms of the loss tangent spectra, the incorporation of the reinforcing long glass fibers restricted the mobility of the matrix resin molecules, increased the storage modulus and reduced the viscoelastic lag between the stress and the strain. As a result, the tan δ intensity was decreased in the LGF/TPU/PBT/PTW composites, as similarly found from other reports . Sung et al results showed that the values of tan δ curves of the polycarbonate (PC)/multiwalled carbon nanotube (MWNT) composites decrease with increasing the MWNT content.…”

Section: Resultsmentioning

confidence: 99%

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Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Zhang

Qin

et al. 2016

Polymer Composites

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Long glass fibers reinforced thermoplastic polyurethane and poly(butylene terephthalate) with the compatibilizer of poly(ethylene-butylacrylate-glycidyl methacrylate copolymer) (LGF/TPU/PBT/PTW) composites were prepared by using self-designed impregnation device. Various rheological plots including viscosity curve, storage modulus, loss modulus, loss angle, Cole-Cole plot, and relaxation spectrum were used to characterization of rheological properties. Dynamic mechanical thermal analysis (DMA) results indicated that "double tan d behavior" of composites is observed. The activation energies of a and b-relaxation process of loss modulus and tan d of the LGF/TPU/PBT/ PTW composites gradually increased with long glass fibers content. Moreover, activation energies for the glass transition relaxation determined from loss tangent peaks are more reliable than using loss modulus criterion. Thermal properties of composites are studied by differential scanning calorimetry (DSC) and thermogravimetric analyses (TGA). Mechanical properties of composites are studied. POLYM. COMPOS., 39:794-806, 2018.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Zhang

Qin

et al. 2016

Polymer Composites

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“…This reason for the phenomenon may be that the increase in saturation pressure led to a higher solubility of CO 2 in the PS/TPU 5% blend, and thus higher homogeneous nucleation. 40,41 As a result, the cell nucleation density of PS/TPU 5% blending foams increased and their cell size decreased, which is demonstrated in Figure 6(b) to (d) and Table 4.…”

Section: Resultsmentioning

confidence: 83%

Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO₂

Jiao³

et al. 2019

Cellular Polymers

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In this article, a facile melt blending and solid batch foaming approach was proposed to prepare microcellular polystyrene/thermoplastic polyurethane (PS/TPU) blending foams with supercritical carbon dioxide (CO2). Compared with those of pure PS and pure TPU, an interesting phenomenon about the enhanced complex viscosity and storage modulus, as well as decreased loss factor of PS/TPU blends, was found. The solubility of CO2 in the PS/TPU blends was enhanced, owing to the CO2 solubilization effects of TPU. An interesting bimodal cell structure (BCS) was observed in the PS/TPU blending foams with the TPU content of 10, 15, and 20%. Consequently, a significant conclusion could be speculated that the generation of BCS in the PS/TPU blending system depended on not only the viscosity and morphology of the polymer blends but also the solubility and diffusivity of the CO2 as well as the type of cell nucleation. The thermal insulation property of PS foam was improved by the introduction of TPU.

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“…Much more uniform cells and higher mechanical properties were found in PP foam with carbon nanofibers . When the added fiber content was high, gradually increased content of carbon fibers led to lower PP crystallinity, higher melt viscoelasticity and higher CO 2 solubility, and finally to more uniform size distribution and higher cell density in the composites . The increased cell density was attributed to the heterogeneous cell nucleation with the addition of carbon fibers.…”

Section: Introductionmentioning

confidence: 98%

Solid‐state foaming of isotactic polypropylene and its composites with spherical or fibrous poly(butylenes terephthalate)

Luo

Xin

Yang

et al. 2014

J of Applied Polymer Sci

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In this article, the foaming behavior of isotactic polypropylene (iPP) and its composites with spherical or fibrous poly(butylenes terephthalate) (PBT) using supercritical CO 2 as a blowing agent were investigated. Their foaming performances were also compared in relation to the crystal morphology and rheological behavior of PP. Results demonstrate that crystal structures significantly impacted the cell structures of foams. At relatively low temperature, microcells appeared at the centers of PP spherulites where the melting started. Particularly, bi-modal cell structure formed in the foamed PP with increasing temperature. However, in the foamed PP composites with spherical or fibrous PBT, this structure almost disappeared due to the smaller PP spherulites. In foaming PP/PBT composites, the heterogeneous nucleation of spherical or fibrous PBT was effective at reducing cell size as well as improving cell density and cell uniformity. The fibrous PBT also acted as scaffolds for preserving cell shapes.

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Batch foaming of short carbon fiber reinforced polypropylene composites

Cited by 21 publications

References 44 publications

Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO₂

Solid‐state foaming of isotactic polypropylene and its composites with spherical or fibrous poly(butylenes terephthalate)

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Batch foaming of short carbon fiber reinforced polypropylene composites

Cited by 21 publications

References 44 publications

Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Rheology characterization, dynamic mechanical, thermal, and mechanical properties of LGF/TPU/PBT/PTW composites

Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO2

Solid‐state foaming of isotactic polypropylene and its composites with spherical or fibrous poly(butylenes terephthalate)

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Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO₂