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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/24251

Title: Enhancing Interfacial Bonding of a Biodegradable Calcium Polyphosphate/Polyvinyl-urethane Carbonate Interpenetrating Phase Composite for Load Bearing Fracture Fixation Applications
Authors: Guo, Yi
Advisor: Pilliar, Robert M.
Santerre, J. Paul
Department: Materials Science and Engineering
Keywords: Orthopaedic
Interpenetrating Phase Composite
Calcium Polyphosphate
Polyvinylurethane
Fracture Fixation
Load Bearing Bones
Biodegradable Composite
Mechanical Testing
silanizing agents
silane
Issue Date: 6-Apr-2010
Abstract: This thesis describe methods to improve the interfacial stability of an interpenetrating phase composite (IPC) polyvinylurethanecarbonate), and to increase the hydrophobicity of the polymer phase. The current IPCs introduce covalent bonding between the phases via silanizing agents to enhance the interfacial stability. Incorporation of the silanizing agents was also intended to reduce the IPC’s sensitivity to interfacial hydration, thereby enhancing the IPC’s resistance to degradation during aging. Lysine diisocyanate was used to increase the hydrophobic character in the polyvinylurethanecarbonate resin. The polymer resins were infiltrated into porous CPP blocks with 25 volume% interconnected porosity and polymerized to produce the IPCs. After mechanical testing following a aging study it was found that the silanizing agents contributed to stability of the mechanical properties under aqueous conditions. It was concluded that the mechanical properties and stability were comparable to available biodegradable composites, as well as being biocompatible to a preosteoblast model cell line.
URI: http://hdl.handle.net/1807/24251
Appears in Collections:Master
Department of Materials Science & Engineering - Master theses

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