生物可降解性牙用/骨用聚乳酸高分子摻合物的製備與鑑定

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Health & Medical Care > Dentistry & Stomatology
College of Oral Medicine > Master and Ph.D. program, School of Dentistry

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生物可降解性牙用/骨用聚乳酸高分子摻合物的製備與鑑定

Preparation and Characterization of Biodegradable PLA Polymeric Blends for Dental and Orthopedic application

闕如玉 , Masters　　Advisor：李勝揚;陳建中　　

繁體中文

生物可吸收性；摻合；界面活性劑；聚左乳酸；聚左右乳酸； Bioresorbable ； Blend ； Surfactant ； Poly- L-lactic acid ； Poly- DL-lactic acid

Abstract │ Reference (22) │ Times Cited (1) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

The purpose of this study is to improve the properties of bioresorbable materials for particular applications in dental and orthopedic surgery. Blends of biodegradable poly-L-lactic acid (PLLA), poly- DL-lactic acid (PDLLA) or polycaprolactone (PCL) , and a third component, the surfactant PEO-PPO, were prepared by blending these three polymers at various ratios using dichloromethane as a solvent. The weight percentages of PLLA/PDLLA (or PCL) blends were 100/0, 80/20, 60/40, 50/50, 40/60, 20/80 and 0/100, respectively. Physical and morphological properties such as crystalline melting point, glass transition point, phase behaviors, degradation behavior and mechanical properties were characterized by thermogravimetric analysis, differential scanning calorimetry, infrared spectroscopy, gel permeation chromatography, scanning electron microscopy and dynamic mechanical analysis. DSC data indicate that PLLA/PDLLA blends without PEOPPO have two Tgs. With the addition of PEOPPO, there is a linear shifting of Tg as a function of composition showing a lesser percentage of PLLA, and a lower glass transition temperature indicating better miscibility has been achieved. DMA data show the best composition of PLLA/PDLLA blends without PEOPPO is 40/60, and the best concentration of PEOPPO is 2%. The 50/50 PLLA/PDLLA/2%PEOPPO blend has better mechanical properties. Elongation of PLLA increases while adding PCL, but the strength decreases at the same time. SEM observation shows that harder and tougher materials have rougher fracture surface morphology.

Reference ( 22 ) 〈TOP〉

杜逸虹(1993) 聚合體學，科學技術叢書/三民書局印行，p.27 張根源(2000) 財團法人工業技術研究院生醫工程中心 (personal communication) Amarpreet S. Sawhney and Jeffrey A. Hubbell (1990) “Rapidly degraded terpolymers of dl-lactide, glycolide, and caprolactone with increased hydrophilicity by copolymerization with polyethers,” Journal of Biomedical Materials Research. 24, 1397-1411.
連結：
Cristian C. Rusa and Alan E. Tonelli.(2000) Polymer/Polymer Inclusion Compounds as a Novel Approach To Obtaining a PLLA/PCL Intimately Compatible Blends. Macromolecules, 33, 5321-5324.
連結：
Daniels AU, Chang MK, Andriano KP.(1990) Mechanical properties of biodegradable polymers and composites proposed for internal fixation of bone. J Appl Biomater; 1: 57-78.
連結：
E. Hirvensalo, O. Bostman, and P. Rokkanen.(1990) Absorbable polyglycolide pins in fixation of displaced fractures of the radial head. Arch Orthop Trauma Surg 109: 258-261.
連結：
Frazza, E.J. and Schmitt, E.E. (1971) A new absorbable suture, J. Biomed.Mater. Res. Symp. 1, 43-58.
連結：

Times Cited (1) 〈TOP〉

柯文昌(2003)。聚乳酸骨釘骨板與骨斷裂面癒合過程間之交互影響。臺北醫學大學牙醫學系碩博士班學位論文。2003。1-180。

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