Ductile PLA nanocomposites with improved thermal stability |
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| Authors: | Bor-Kuan Chen Chien-Chang Shih Antonia F Chen |
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| Affiliation: | 1. Department of Materials Engineering, Kun Shan University, Tainan 71003, Taiwan;2. Department of Orthopaedic Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA 15213, USA;1. Instituto de Tecnología de Materiales (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801, Alcoy, Alicante, Spain;2. Departamento de Química Orgánica, Facultad de Óptica y Optometría, Universidad Complutense de Madrid, Arcos de Jalón 118, 28037, Madrid, Spain;1. Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 333, Taiwan;2. Department of General Dentistry, Chang Gung Memorial Hospital, Taoyuan 333, Taiwan;3. Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan 333, Taiwan;1. Department of Science Education, Graduate School of Education, Hiroshima University, 1-1-1 Kagamiyama, Higashi-Hiroshima 739-8524, Japan;2. Department of Applied Chemistry, National Defense Academy of Japan, 1-10-20 Hashirimizu, Yokosuka 239-8686, Japan;3. Natural Science Center for Basic Research and Development, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan;4. Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-Ku, Fukuoka 814-0180, Japan;1. University of Perugia, Civil and Environmental Engineering Department, UdR INSTM, Strada di Pentima 4, 05100 Terni, Italy;2. Institute of Polymer Science and Technology, ICTP-CSIC, Juan de la Cierva 3, 28006, Madrid, Spain;1. Tshwane University of Technology, Department of Chemical, Metallurgical and Materials Engineering, Pretoria, South Africa;2. Centre for Quality Assurance & Non Destructive Evaluation Sathyabama University, Chennai-600119, India;3. DST/CSIR Nanotechnology Innovation Centre, National Centre for Nano-Structured Materials, Council for Scientific and Industrial Research, P.O. Box 835, Pretoria, South Africa;4. Department of Polymer Science & Technology, University of Calcutta, Kolkata, India |
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| Abstract: | Polylactide (PLA) is used as a biomedical material because it is biodegradable, but the vast majority of biodegradable polymers in clinical use are composed of rather stiff materials that are unsuitable for use in numerous applications because they exhibit limited extendibility, weak mechanical strength, and poor thermal stability. We modified PLA with 2-methacryloyloxyethyl isocyanate (MOI) to prepare ductile PLA materials. By utilizing a novel sol–gel process, PLA nanocomposites were further prepared with improved mechanical properties and thermal stability. The 10% thermal decomposition temperature for PLA modified with 5% MOI and 5–10% silica was 21–32 °C higher than that of original pristine PLA. Elongation at break increased by 4–13 times when compared to neat PLA while the tensile strength was maintained at 30–40 MPa. These synthesized PLA nanocomposites can be applied as biomaterials with improved mechanical and thermal properties. |
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