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PubbliTesi - La Tesi
Investigation of peroxides crosslinking effect on the properties of medical grade UHMWPE
Scheda Sintetica
Autore: Giacomo Sciarra
Relatore: Pierangiola Bracco
Università: Università degli Studi di Torino
Facoltà: Facoltà di Scienze Matematiche, Fisiche e Naturali
Corso: Laurea Spec. in Chimica Industriale
Data di Discussione: 31/03/2017
Voto: 110 cum laude
Disciplina: Chimica dei Polimeri
Tipo di Tesi: Sperimentale
Altri Relatori: Anuj Bellare
Lingua: Inglese
Grande Area: Area Scientifica
Dignità di Stampa: Si
Settori Interessati: Biomedica
Descrizione:
Orthopaedic implants have only a finite lifetime. The most important factor controlling the lifetime of PE prostheses is the wear resistance. Crosslinking has been employed with success to improve the wear resistance. In recent years also chemical crosslinking by organic peroxides has been used. In this study the effects of three different peroxides and contents of each of them on the mechanical and chemical-physical properties of medical grade UHMWPE were investigated and compared. All the specimens were processed by both normal compression moulding and high-pressure crystallization and their effects on the morphological features and crosslinking process were investigated. Furthermore, as peroxides are known to create radical species that can trigger the oxidative degradation of PE, the effect of the addition of an antioxidant was also investigated.