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Aluminum Trihydrate

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Regina C R Nunes – 1st expert on this subject based on the ideXlab platform

  • mechanical properties of thermoplastic polyurethane elastomers with mica and Aluminum Trihydrate
    European Polymer Journal, 2001
    Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, Regina C R Nunes

    Abstract:

    Abstract In the present work two types of fillers were incorporated into thermoplastic polyurethane elastomers (TPU): mica and Aluminum Trihydrate (ATH). In the first stage, mixtures were prepared with TPU and 5, 10, 20, 25 and 30 phr of mica. The optimum amount of filler was evaluated for mechanical properties. In the second stage, ATH was used in mixtures with TPU and mica in the preparation of compositions with good flame retardant. All mixtures were obtained by extrusion and after compression molding they were evaluated through mechanical properties of tensile resistance, Shore A hardness and abrasion resistance. The objective of this work is to obtain good mechanical properties from TPU composites with mica–ATH as fillers and optimum cost-performance balance, in addition to flame retardant characteristics.

  • flame retardancy in thermoplastic polyurethane elastomers tpu with mica and Aluminum Trihydrate ath
    Polymer Degradation and Stability, 2000
    Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, J B Gallo, Regina C R Nunes

    Abstract:

    Abstract Two types of Aluminum Trihydrate (ATH), with or without surface treatment, and mica were incorporated into TPU composites. The quantity of mica that should be used has been previously evaluated from mechanical properties. In the present work, different mixtures of TPU/ATH/mica were prepared and those compositions presenting fire retardancy were identified through the two principal tests in this area: vertical burning (UL94) and oxygen index (ASTM D2863). The influence of mica on fire resistance was also evaluated. The objective of this work was to obtain good flame retardancy in TPU–mica composites and an optimum cost-performance balance as a consequence of mica addition.

Ubirajara Almeida Pinto – 2nd expert on this subject based on the ideXlab platform

  • mechanical properties of thermoplastic polyurethane elastomers with mica and Aluminum Trihydrate
    European Polymer Journal, 2001
    Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, Regina C R Nunes

    Abstract:

    Abstract In the present work two types of fillers were incorporated into thermoplastic polyurethane elastomers (TPU): mica and Aluminum Trihydrate (ATH). In the first stage, mixtures were prepared with TPU and 5, 10, 20, 25 and 30 phr of mica. The optimum amount of filler was evaluated for mechanical properties. In the second stage, ATH was used in mixtures with TPU and mica in the preparation of compositions with good flame retardant. All mixtures were obtained by extrusion and after compression molding they were evaluated through mechanical properties of tensile resistance, Shore A hardness and abrasion resistance. The objective of this work is to obtain good mechanical properties from TPU composites with mica–ATH as fillers and optimum cost-performance balance, in addition to flame retardant characteristics.

  • flame retardancy in thermoplastic polyurethane elastomers tpu with mica and Aluminum Trihydrate ath
    Polymer Degradation and Stability, 2000
    Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, J B Gallo, Regina C R Nunes

    Abstract:

    Abstract Two types of Aluminum Trihydrate (ATH), with or without surface treatment, and mica were incorporated into TPU composites. The quantity of mica that should be used has been previously evaluated from mechanical properties. In the present work, different mixtures of TPU/ATH/mica were prepared and those compositions presenting fire retardancy were identified through the two principal tests in this area: vertical burning (UL94) and oxygen index (ASTM D2863). The influence of mica on fire resistance was also evaluated. The objective of this work was to obtain good flame retardancy in TPU–mica composites and an optimum cost-performance balance as a consequence of mica addition.

Yong Ning – 3rd expert on this subject based on the ideXlab platform

  • mechanochemical improvement of the flame retardant and mechanical properties of zinc borate and zinc borate Aluminum Trihydrate filled poly vinyl chloride
    Journal of Applied Polymer Science, 2003
    Co-Authors: Hong Pi, Yong Ning

    Abstract:

    In this study, the effect of the high-energy mechanical milling of a mixture of poly(vinyl chloride) (PVC) with zinc borate (ZB) or ZB–Aluminum Trihydrate (ATH), a mixture of ZB and ATH, on the flame-retardant and mechanical properties of ZB and ZB–ATH filled PVC was examined. The high-energy mechanical milling of PVC/ZB and the PVC/ZB–ATH mixture produced chemical bonding between PVC and ZB or ZB–ATH, increasing the interfacial interaction of PVC/ZB and PVC/ZB–ATH blends, which resulted in a great increase in the limiting oxygen index, the impact and yield strengths, and the elongation at break of PVC/ZB and PVC/ZB–ATH blends. The results from ultraviolet spectroscopy and gas chromatography–mass spectroscopy show that mechanochemical modification of ZB and ZB–ATH much more effectively suppressed the release of aromatic compounds in PVC/ZB and PVC/ZB–ATH blends during burning. Mechanochemical modification provided an excellent route for the improvement of the flame-retardant and mechanical properties of flame-retardant-additive-filled PVC. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 753–762, 2003

  • Mechanochemical improvement of the flame‐retardant and mechanical properties of zinc borate and zinc borate–Aluminum Trihydrate‐filled poly(vinyl chloride)
    Journal of Applied Polymer Science, 2003
    Co-Authors: Hong Pi, Yong Ning

    Abstract:

    In this study, the effect of the high-energy mechanical milling of a mixture of poly(vinyl chloride) (PVC) with zinc borate (ZB) or ZB–Aluminum Trihydrate (ATH), a mixture of ZB and ATH, on the flame-retardant and mechanical properties of ZB and ZB–ATH filled PVC was examined. The high-energy mechanical milling of PVC/ZB and the PVC/ZB–ATH mixture produced chemical bonding between PVC and ZB or ZB–ATH, increasing the interfacial interaction of PVC/ZB and PVC/ZB–ATH blends, which resulted in a great increase in the limiting oxygen index, the impact and yield strengths, and the elongation at break of PVC/ZB and PVC/ZB–ATH blends. The results from ultraviolet spectroscopy and gas chromatography–mass spectroscopy show that mechanochemical modification of ZB and ZB–ATH much more effectively suppressed the release of aromatic compounds in PVC/ZB and PVC/ZB–ATH blends during burning. Mechanochemical modification provided an excellent route for the improvement of the flame-retardant and mechanical properties of flame-retardant-additive-filled PVC. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 753–762, 2003

  • flame retardant and smoke suppressant properties of zinc borate and Aluminum Trihydrate filled rigid pvc
    Journal of Applied Polymer Science, 2000
    Co-Authors: Yong Ning

    Abstract:

    The effects of zinc borate (ZB), Aluminum Trihydrate (ATH), and their mixture on the flame-retardant and smoke-suppressant properties of poly(vinyl chloride) (PVC) as well as their mechanism for flame retardancy and smoke suppression were studied through the limiting oxygen index (LOI) test, smoke density test, TGA, GC–MS, and SEM. The results show that incorporation of a small amount of ZB, ATH, and their mixture can greatly increase the LOI of PVC and reduce the smoke density of PVC during combustion. The mixture of ZB with ATH has a good synergistic effect on the flame retardance and smoke suppression of PVC. TGA and GC–MS analyses results show that incorporation of a small amount of ZB, ATH, and their mixture greatly promotes the char formation of PVC and decreases the amount of hazardous gases such as benzene and toluene released in PVC during combustion. Their mechanism is also proposed. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 3119–3127, 2000