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Modification and characteristics of biodegradable polymer suitable for selective laser sintering

Content Provider	Springer Nature Link
Author	Lee, Pil Ho Chang, Eunyoung Yu, Seunghye Lee, Sang Won Kim, Il Won Park, Sungjin Chung, Haseung
Copyright Year	2013
Abstract	This paper investigates the methodology to modify biodegradable polymers having random size, shape, and molecular weight into particles appropriate for selective laser sintering (SLS), which is a powerful technique to build arbitrarily complex objects. Polycaprolactone (PCL), which has recently drawn significant attention as biodegradable polymer for potential application in bone and cartilage repair, was used in this study. PCL powders with various sizes, shapes, and molecular weights were modified by chemical processes and resultant shape, size distribution, degree of crystallinity, and thermophysical properties were observed by optical and scanning electron microscopy (OM and SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The modified PCL as well as raw material were sintered by CO$_{2}$ laser irradiation with 10.6-ím wavelength, and specimens for tensile testing were fabricated. By simple design of experiment (DOE) method, macro and micro structures of the fabricated parts were observed depending on various processing parameters related with SLS. Finally, micro tensile tests were conducted, and tensile properties as a function of molecular weight and particle shape were obtained. All the procedures attempted in this study can be extensively applied to other biodegradable polymers. Since SLS has an advantage to deposit multiple materials spatially, the obtained mechanical properties can be referred to generate functionally graded material (FGM), which incorporates deliberately designed transition in materials composition and properties within a component, by SLS.
Starting Page	1079
Ending Page	1086
Page Count	8
File Format	PDF
ISSN	22347593
Journal	International Journal of Precision Engineering and Manufacturing
Volume Number	14
Issue Number	6
e-ISSN	20054602
Language	English
Publisher	Korean Society for Precision Engineering
Publisher Date	2013-06-19
Publisher Place	Springer
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biodegradable polymer Selective laser sintering (SLS) Material characteristics Mechanical properties Functionally graded material (FGM) Industrial and Production Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Mechanical Engineering Electrical and Electronic Engineering

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