کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1429871 987188 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanical properties of a degradable phosphate glass fibre reinforced polymer composite for internal fracture fixation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Mechanical properties of a degradable phosphate glass fibre reinforced polymer composite for internal fracture fixation
چکیده انگلیسی

This paper reports on the mechanical properties and pH upon degradation of phosphate glass fibre reinforced methacrylate-modified oligolactide. Phosphate glass fibres of the composition 51.04 P2O5–21.42 CaO–25.51 Na2O–2.03 SiO2 (mol%) were produced by a crucible spinning technique. Fibres were embedded into a matrix of a degradable organic polymer network based on methacrylate-modified oligolactide; samples with and without addition of CaCO3 for pH control were produced. pH during degradation in physiological NaCl solution could be increased to up to 6.5 by addition of 20 wt.% calcium carbonate to the fibre composites. pH in Tris buffer solution was about 7.11. Mechanical properties of dry specimens were investigated during 3-point bending tests and gave elastic moduli in the range of cortical bone (15 to 20 GPa). However, addition of calcium carbonate decreased tensile strength of the fibre composites and resulted in brittle fracture behaviour, while CaCO3-free composites showed a fibrous fracture mode. Control of pH and degradation is a requirement for obtaining a fracture fixation device with degradation properties matching in vivo requirements. Results show that addition of CaCO3 is suitable for controlling the pH during degradation of metaphosphate glass polymer composites.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 30, Issue 7, 30 August 2010, Pages 1003–1007
نویسندگان
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