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Modelling degradation of amorphous biodegradable polyesters: Basic model

Tipo de material: TextoTextoSeries ; Modelling Degradation of Bioresorbable Polymeric Medical Devices, p.15-31, 2014Trabajos contenidos:
  • Pan, J
  • Chen, X
Tema(s): Recursos en línea: Resumen: This chapter introduces a mathematical model for the degradation of amorphous polymers. A degrading polymer is made of long and short polymer chains saturated with water molecules. In degradation the long chains gradually cleave into short ones through hydrolysis. A master equation is presented that governs the process. Integration of the equation gives average molecular weight as function of time. Analytical solutions are presented for two limiting cases. A numerical method and computer programme are provided for solving the equation in general circumstances. Short chain diffusion is neglected (see Chapter 6 for the validity of this assumption). © 2015 Elsevier Ltd. All rights reserved.
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This chapter introduces a mathematical model for the degradation of amorphous polymers. A degrading polymer is made of long and short polymer chains saturated with water molecules. In degradation the long chains gradually cleave into short ones through hydrolysis. A master equation is presented that governs the process. Integration of the equation gives average molecular weight as function of time. Analytical solutions are presented for two limiting cases. A numerical method and computer programme are provided for solving the equation in general circumstances. Short chain diffusion is neglected (see Chapter 6 for the validity of this assumption). © 2015 Elsevier Ltd. All rights reserved.

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