Halogen-free phosphorus-containing flameretardant epoxy composites

• Autores: Xiaomin Zhao
• Directores de la Tesis: Javier Llorca Martínez (dir. tes.), De-Yi Wang (codir. tes.)
• Lectura: En la Universidad Politécnica de Madrid ( España ) en 2017
• Idioma: español
• Tribunal Calificador de la Tesis: Carlos González Martínez (presid.), Álvaro Ridruejo (secret.), Juan Baselga Llido (voc.), Jenny Alongi (voc.), Juan Pedro Fernández Blázquez (voc.)
• Materias:
  • Física
    • Física del estado sólido
      • Materiales compuestos
• Enlaces
  • Tesis en acceso abierto en: Archivo Digital UPM
• Resumen

  •  Datos identificativos de la tesis Author: Xiaomin Zhao Title of the thesis: Halogen-free phosphorus-containing flame-retardant epoxy composites Director: De-Yi Wang y Javier Llorca Department: Starting date of the Thesis (high in the doctoral program in which it has been defended):22 September 2012 Finishing Date of the thesis: 22 September 2016  Interés y actualidad del tema de investigación:  ¿La tesis responde a una demanda del entorno industrial o institucional? Yes. Epoxy resin and its composites have large market demands for durable paints, coatings, adhesives, composites and laminates materials in transportation, aerospace, electrical and electronic (EE) industrials due to the excellent performances, such as high mechanical strength, outstanding chemical and heat resistance, excellent adhesiveness and electrical properties. Nevertheless, high flammability is one unavoidable disadvantage to epoxy resin, particularly in EE application. Owing to the enhanced concern to environment and human health, halogen-free high flame-retardant epoxy resin and it composites are being demanded.

    The results and conclusions of the thesis are fundamental study of impact of phosphorous’ chemical environment on flame retardancy of epoxy with phosphorous-containing flame retardants (P-FRs) in Chapters 3, 4 and 5. An explorative research of a synthesized P-FR being used in industrialized RTM6/carbon fiber composite was done from processing and performances in Chapter 6.

     Innovación/creatividad/originalidad/multidisciplinariedad: búsqueda de nuevas soluciones o alternativas o integrar conocimientos de diferentes tecnologías.

    Customizing P-FRs for polymers is difficult in current research and industrial. It requires a deep insight into the relationship between the chemical structures of P-FRs and the flame-retardant efficiency. In literature works, few works were aimed to study this relationship. However, a systematic study was planned and carried out to study the relationship between phosphorous’ chemical environment of P-FRs and their flame-retardant efficiency in epoxy resin in this thesis. An original finding was found that the high flame retardancy was related with a fact that the release of PO from P-FRs was in a temperature region overlapped with the release of hydrocarbon compounds from epoxy matrix.

     Valoración de la originalidad de las aportaciones realizadas y mejora del estado de la técnica.

    The results and conclusions in this study point out that customizing P-FRs for different polymers is practical via tuning the phosphorous’ chemical environment in P-FR structure in future.

     Creación de valor: las aportaciones producen valor añadido. ¿Se pueden derivar en el futuro artículos, patentes, realizaciones, contratos, etc? Five papers have been published in good journals. For future, two more papers at least are still in preparation: 1, Xiaomin Zhao, Lu Zhang, Juan Picon Alonso and De-Yi Wang, impact of halogen-free phenylphosphonic amide on rheological and mechanical properties of flame-retardant RTM6/carbon fiber composite, composite science and technology; 2, Xiaomin Zhao, Juan Picon Alonso and D.-Y.Wang *, Comparison study of gas phase actions of halogen-free phosphorous-containing flame retardant in two epoxy resins, Polymers.

     Transferencia de tecnología: aplicabilidad e interés del trabajo. Beneficio para la comunidad universitaria y/o entorno industrial.

    An interest is attractive to industrial that halogen-free phenylphosphonic amide compounds are one efficient flame retardant for diglycidyl ester of bisphenol A type of epoxy resin. Good flame retardancy was achieved at a 5 wt% loading without scarifying mechanical properties.

     Futuros trabajos.

    In academia, a postdoc position for groups around the world whose research interest covers the area of polymers and composite materials is possibly to be offered. As an alternative choice working in industry, the author maybe a suitable candidate for positions requiring research experiences in flame retardant polymer and composite materials