Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites
The use of thermoplastic composites based on poly(lactic) acid and phosphate glass fibres over metallic alloys for clinical restorative treatment is highly beneficial due to their biocompatibility and biodegradability. However, difficulties in achieving a thorough melt impregnation at high fibre con...
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| Format: | Article |
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Elsevier
2016
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| Online Access: | https://eprints.nottingham.ac.uk/32820/ |
| _version_ | 1848794497094254592 |
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| author | Barrera Betanzos, Fernando Gimeno-Fabra, Miquel Segal, Joel Grant, David Ahmed, Ifty |
| author_facet | Barrera Betanzos, Fernando Gimeno-Fabra, Miquel Segal, Joel Grant, David Ahmed, Ifty |
| author_sort | Barrera Betanzos, Fernando |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The use of thermoplastic composites based on poly(lactic) acid and phosphate glass fibres over metallic alloys for clinical restorative treatment is highly beneficial due to their biocompatibility and biodegradability. However, difficulties in achieving a thorough melt impregnation at high fibre contents while limiting polymer degradation is one of the main issues encountered during their manufacture. This paper reports for the first time on the effects of pressure cycling on the mechanical properties of compression moulded polylactic acid-phosphate glass fibre composites. The strength of the composites consolidated under pressure cycling were at least 30% higher than those in which conventional static pressure was used. The marked disparity was attributed to the influence of pressure cycling on the fibre preform permeability, the melt viscosity and the capillary pressure, leading to improved fibre wet-out with respect to static pressure. Implementation of a cyclic pressure appeared to promote the occurrence of transcrystallinity in the polymer matrix as suggested by DSC traces. The fibre content influenced PLA thermal degradation since the matrix molecular weight decreased as the fibre content increased on account of the moisture adsorbed by the glass surface. However, this extent of degradation did not impair the matrix mechanical performance in the composites. |
| first_indexed | 2025-11-14T19:17:08Z |
| format | Article |
| id | nottingham-32820 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:17:08Z |
| publishDate | 2016 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-328202020-05-04T17:56:27Z https://eprints.nottingham.ac.uk/32820/ Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites Barrera Betanzos, Fernando Gimeno-Fabra, Miquel Segal, Joel Grant, David Ahmed, Ifty The use of thermoplastic composites based on poly(lactic) acid and phosphate glass fibres over metallic alloys for clinical restorative treatment is highly beneficial due to their biocompatibility and biodegradability. However, difficulties in achieving a thorough melt impregnation at high fibre contents while limiting polymer degradation is one of the main issues encountered during their manufacture. This paper reports for the first time on the effects of pressure cycling on the mechanical properties of compression moulded polylactic acid-phosphate glass fibre composites. The strength of the composites consolidated under pressure cycling were at least 30% higher than those in which conventional static pressure was used. The marked disparity was attributed to the influence of pressure cycling on the fibre preform permeability, the melt viscosity and the capillary pressure, leading to improved fibre wet-out with respect to static pressure. Implementation of a cyclic pressure appeared to promote the occurrence of transcrystallinity in the polymer matrix as suggested by DSC traces. The fibre content influenced PLA thermal degradation since the matrix molecular weight decreased as the fibre content increased on account of the moisture adsorbed by the glass surface. However, this extent of degradation did not impair the matrix mechanical performance in the composites. Elsevier 2016-06-15 Article PeerReviewed Barrera Betanzos, Fernando, Gimeno-Fabra, Miquel, Segal, Joel, Grant, David and Ahmed, Ifty (2016) Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites. Materials & Design, 100 . pp. 141-150. ISSN 0261-3069 Bioresorbable composites; Phosphate glass fibre; Polylactic acid; Cyclic pressure http://www.sciencedirect.com/science/article/pii/S0264127516303914 doi:10.1016/j.matdes.2016.03.108 doi:10.1016/j.matdes.2016.03.108 |
| spellingShingle | Bioresorbable composites; Phosphate glass fibre; Polylactic acid; Cyclic pressure Barrera Betanzos, Fernando Gimeno-Fabra, Miquel Segal, Joel Grant, David Ahmed, Ifty Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| title | Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| title_full | Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| title_fullStr | Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| title_full_unstemmed | Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| title_short | Cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| title_sort | cyclic pressure on compression-moulded bioresorbable phosphate glass fibre reinforced composites |
| topic | Bioresorbable composites; Phosphate glass fibre; Polylactic acid; Cyclic pressure |
| url | https://eprints.nottingham.ac.uk/32820/ https://eprints.nottingham.ac.uk/32820/ https://eprints.nottingham.ac.uk/32820/ |