I would like to express my gratitude to all those who helped me during my whole PhD period and the writing of this thesis. My deepest gratitude goes first and foremost to Professor De-Yi Wang, my supervisor, for his constant encouragement and guidance. Four years ago, he provided me the chance to do the research in IMDEA, and thereby changed the course of my life. To be honest, before I came to De-Yi's group, the academic skills I mastered were extremely limited. During the past four-year

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... , with his patient instruction, insightful criticism and expert guidance, I stepped into the scientific palace gradually: from a beginner to a more professional one. He always told us to hold the bottom line of scientific research firmly, and I will remind myself about his words for my whole life. Second, I would like to express my heartfelt gratitude to all the colleagues in IMDEA and all my group members. Acknowledgement goes to Dr. Nerea Pé rez Gonzá lez, Jimena de la Vega, et al. all the intern students and all my group members who helped me in different extent during the past days. Last my thanks would go to my beloved parents for their loving considerations and great confidence in me all through these years. They always help me out of difficulties and support me without a word of complaint. Also I owe much to my girlfriend Hongzhen Liu for her company, care and love. We together spent the most happiness two years in Spain. I am very grateful to the China Scholarship Council for the four years financial support. I will remember this precious memory for my PhD period forever. Yetang Pan November RESUMEN Poli (cloruro de vinilo) (PVC), un material termoplá stico versá til, se ha estado usando en diferentes campos de aplicación tales como alambre y cable, materiales de construcción y tapicerí a debido a su excelente resistencia mecá nica, estabilidad té rmica, retardante de llama y por sus caracterí sticas aislantes. Debido al alto contenido de cloro que contiene el PVC, que actúa en la fase de vapor mediante un mecanismo radicalario para interrumpir los procesos exoté rmicos y suprimir la combustión, el PVC posee una alta retardancia de llama intrí nsecamente. Sin embargo, la adición de una gran cantidad de plastificantes inflamables en PVC para preparar PVC flexible resta valor a las propiedades igní fugas del PVC en sí. El retardante de llama tradicional para PVC flexible es el trióxido de antimonio, pero está demostrado que tiene una toxicidad potencial debido ABSTRACT Poly(vinyl chloride) (PVC), a versatile thermoplastic material, has been widely used in various aspects, such as wire and cable, building materials, and upholstery because of their excellent mechanical strength, thermal stability, flame retardancy and insulation characteristics. Due to the high content of chlorine containing in PVC, which acts in the vapour phase by a radical