超音波檢測生物可分解性高分子之性質 An Ultrasonic Technique for Characterization of Biodegradable Polymers

dc.contributor 國立臺灣師範大學圖文傳播學系 zh_tw
dc.contributor.author 王希俊 zh_tw
dc.contributor.author 張文基 zh_tw
dc.contributor.author Winet,H. zh_tw
dc.date.accessioned 2014-10-30T09:35:30Z
dc.date.available 2014-10-30T09:35:30Z
dc.date.issued 2002-02-01 zh_TW
dc.description.abstract 生物可分解性高分子除了應用於藥物控制釋放及骨科復健植入也是一種具有環保特性的被印體材料,本研究應用超音波檢測技術來量測生物可份解性高份子浸置於水中不同時間後的裂解特性,二千萬周率之縱波由超音文轉換器產生後穿透過高分子材料並由感測器接收及數位化,快速傅立葉轉換及交錯相關係數法等數位訊諕處理技術將數位化的波形轉換,並計算超音波在高分子中的波速及衰減係數,結果顯示超音波的波速在高分子裂解過程中降低三分之一而衰減係數則增加四倍,故超音波檢測技術是有用的工具來量測與鑑定生物可分解性高分子材料的裂解特性。 zh_tw
dc.description.abstract An ultrasonic technique was used to measure material property change during hydrolytic degradation of a biodegradable copolymer, 50/50 poly(D,L-lactide-co-glycolide). Six groups of 3 copolymer buttons were immersed in 60℃ distilled water for 0, 1.5, 3.0, 6.0, 10.0 and 24.0 hours. A longitudinal wave generated by a 20MHz transducer and a pulser/receiver card was directed per-pendicularly to copolymer disk at 20℃. The reflected signals coming back to transducer were recorded and saved through a data acquisition board. The longitudinal wave speeds and attenuation coefficients of the disks undergoing various exposures to a water bath were calculated by the cross-correlation method nand fast Fourier transformation (FFT) of the digitized waveform data. The wave speed decreased by a factor on one third and the attenuation coefficient increased up to four times within 24 hours in the 60℃ water bath. The results suggest that the ultrasonic technique provides a useful method for the study of hydrolytic degradation of poly(D,L-lactide-co-glycolide) in a non-destructive manner. en_US
dc.identifier ntnulib_tp_E0304_01_002 zh_TW
dc.identifier.issn 1683-5891 zh_TW
dc.identifier.uri http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/36544
dc.language en zh_TW
dc.publisher 國立臺灣師範大學圖文傳播學報編審委員會 zh_tw
dc.relation 圖文傳播學報,1(1),89-96。 zh_tw
dc.subject.other 縱波 zh_tw
dc.subject.other 波速 zh_tw
dc.subject.other 衰減係數 zh_tw
dc.subject.other 生物可分解性高分子 zh_tw
dc.subject.other Longitudinal wave en_US
dc.subject.other Wave speed en_US
dc.subject.other Attenuation coefficient en_US
dc.subject.other Poly(D en_US
dc.subject.other Llactide-co-glycolide) en_US
dc.title 超音波檢測生物可分解性高分子之性質 zh_tw
dc.title An Ultrasonic Technique for Characterization of Biodegradable Polymers en_US
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