재생 ABS/재생 PETG 블렌드의 물성에 미치는 고강도 초음파의 영향 (Effects of High Intensity Ultrasound on the Propertiesof Recycled ABS/Recycled PETG Blends)

서지정보

· 발행기관 : 한국고분자학회
· 수록지 정보 : 폴리머 / 46권 / 1호 / 56 ~ 61페이지
· 저자명 : 정우철, 이상묵

초록

재생 acrylonitrile butadiene styrene copolymer(ABS)와 재생 polyethylene terephthalate glycol-modified(PETG)의 블렌드에 초음파가 미치는 영향을 조사하였다. 초음파 가진 장치가 장착된 용융 혼련기를 이용하여 재생ABS/재생 PETG(50/50) 블렌드를 준비하였고 열적, 기계적 물성 및 미세구조를 시차주사열량계(DSC), 만능시험기(UTM), 주사전자현미경(SEM), 원자간격현미경(AFM), 감쇠전반사(ATR)를 이용하여 살펴보았다. 초음파를 가진한블렌드의 물성은 초음파 가진 시간에 따라 변하였는데 초음파를 15초간 가진했을 때에도 인장강도의 뚜렷한 증가를보였다. 이는 초음파로 인해 생성된 재생 ABS와 재생 PETG의 공중합체가 계면 접착력을 향상시켰기 때문이라고판단되었다.

영어초록

This study is focused on a contact lens for shielding blue light emitted from LED digital devices, preventing macular degeneration as well as an effective protection of human eyes. For the blue light blocking lens, coumarin was used as blue light blocking material and polymethylmethacrylate (PMMA) was engaged as a material for contact lens. As a solvent for PMMA, dichloromethane, chloroform, ethyl acetate, acetone, and toluene were used and tested. Among the solvents, toluene showed the highest transparency and strength/solidity. For blue light shielding rate, coumarin was administrated with different concentration to the PMMA film, then light absorbance was measured for each specimen. In results, coumarin/PMMA films (contact lens) within 325 nm (UV-A) region, all specimens, 1 mM, 2.5 mM, 5 mM, and 10 mM of coumarin contents PMMA films, showed 99% of blue light shielding rate. In case of 375 nm region, each specimen showed shielding blue light as 5.69% at 1 mM, 43.34% at 2.5 mM, 56.45% at 5 mM, and 66.25% at 10 mM. Conclusively, PMMA contact lenses with coumarin contents reduced the intensity of blue light generated by LED digital devices to the level of natural light.

참고자료

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