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KMID : 1011420140190040429
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Journal of Korean Ophthalmic Optics Society
2014 Volume.19 No. 4 p.429 ~ p.434
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Analysis of Mechanical Property Changes of Polymer Eyeglass Frames by Thermal Impact
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Seo Ho-geun
Yoon Tae-yang
Noh Hye-Ran
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Abstract
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Purpose: To analyze thermal effect on mechanical properties of domestic commercial polymer-based eyewear frames.
Methods: In this study, materials of cellulose acetate, polyamide, epoxy, and polyetherimide were exposed to high or low temperature and were mounted on universal test machine (TO-100-IC) for tensile strength test. Elastic behavior, Young’s modulus, maximum displacement, and fatigue were tested with various temperature(?25oC, 25oC, 60oC).
Results: As a result, at room temperature, displacements of materials were changed with increasing impact load. At low temperature (?25oC), maximum displacements of all specimens were decreased but young’s modulus were increased. However, at high temperature, maximum displacements of all specimens were increased but young’s modulus were decreased.
Conclusions: Degree of displacements due to fatigue behavior was increased following direction of PEI, epoxy, polyamide, acetate. We concluded that commercial polymers used in eyewear frames physical properties were changed differently to exposed temperature.
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KEYWORD
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Polymer lens, Thermal effect, Tensile strength, Young’s modulus
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