The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Regina C R Nunes - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of thermoplastic polyurethane elastomers with mica and Aluminum Trihydrate
European Polymer Journal, 2001Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, Regina C R NunesAbstract: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.
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flame retardancy in thermoplastic polyurethane elastomers tpu with mica and Aluminum Trihydrate ath
Polymer Degradation and Stability, 2000Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, J B Gallo, Regina C R NunesAbstract: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 - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of thermoplastic polyurethane elastomers with mica and Aluminum Trihydrate
European Polymer Journal, 2001Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, Regina C R NunesAbstract: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.
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flame retardancy in thermoplastic polyurethane elastomers tpu with mica and Aluminum Trihydrate ath
Polymer Degradation and Stability, 2000Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, J B Gallo, Regina C R NunesAbstract: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 - One of the best experts on this subject based on the ideXlab platform.
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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, 2003Co-Authors: Hong Pi, Yong NingAbstract: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
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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, 2003Co-Authors: Hong Pi, Yong NingAbstract: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
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flame retardant and smoke suppressant properties of zinc borate and Aluminum Trihydrate filled rigid pvc
Journal of Applied Polymer Science, 2000Co-Authors: Yong NingAbstract: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
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Flame‐retardant and smoke‐suppressant properties of zinc borate and Aluminum Trihydrate‐filled rigid PVC
Journal of Applied Polymer Science, 2000Co-Authors: Yong NingAbstract: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
Leila L Y Visconte - One of the best experts on this subject based on the ideXlab platform.
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mechanical properties of thermoplastic polyurethane elastomers with mica and Aluminum Trihydrate
European Polymer Journal, 2001Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, Regina C R NunesAbstract: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.
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flame retardancy in thermoplastic polyurethane elastomers tpu with mica and Aluminum Trihydrate ath
Polymer Degradation and Stability, 2000Co-Authors: Ubirajara Almeida Pinto, Leila L Y Visconte, J B Gallo, Regina C R NunesAbstract: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.
Timo Karki - One of the best experts on this subject based on the ideXlab platform.
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accelerated weathering of fire retarded wood polypropylene composites
Composites Part A-applied Science and Manufacturing, 2016Co-Authors: Irina Turku, Timo KarkiAbstract:Abstract In this study, the influence of fire retardants, namely Aluminum Trihydrate, zinc borate, melamine, graphite, titanium dioxide on the durability of polypropylene-based co-extruded wood–plastic composites is studied. The composites underwent accelerated weathering under a xenon-arc lamp source during 1000 h. FTIR analysis of the composite surface revealed a degradation process which was accompanied by chemical changes, including vinyl-like and carbonyl groups accumulation; fire retardants did not influence the photo-oxidation mechanism of the composite. Fire retardant-loaded samples had smaller color change compared to the unfilled one. The tensile properties of all composites declined after the weathering. Significant changes in the surface morphology of the weathered composites were observed with a scan electron microscope.
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Accelerated weathering of fire-retarded wood–polypropylene composites
Composites Part A-applied Science and Manufacturing, 2016Co-Authors: Irina Turku, Timo KarkiAbstract:Abstract In this study, the influence of fire retardants, namely Aluminum Trihydrate, zinc borate, melamine, graphite, titanium dioxide on the durability of polypropylene-based co-extruded wood–plastic composites is studied. The composites underwent accelerated weathering under a xenon-arc lamp source during 1000 h. FTIR analysis of the composite surface revealed a degradation process which was accompanied by chemical changes, including vinyl-like and carbonyl groups accumulation; fire retardants did not influence the photo-oxidation mechanism of the composite. Fire retardant-loaded samples had smaller color change compared to the unfilled one. The tensile properties of all composites declined after the weathering. Significant changes in the surface morphology of the weathered composites were observed with a scan electron microscope.
