http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Localization behavior of multiwalled carbon nanotubes in ternary blends of PC, SAN, and PMMA
양석호,이정우,김형수 한국유변학회 2020 Korea-Australia rheology journal Vol.32 No.2
In this study, the localization behavior of multiwalled carbon nanotubes (MWCNTs) was investigated in the ternary blends based on PC/SAN/PMMA (60/30/10). The major interest was focused on the effects of two different SANs having AN contents of 24 and 32 wt.% (SAN24 and SAN32, respectively) and PMMA on the phase structure of the composites. It was found that the spreading of PMMA around SAN32 was pronounced and relatively higher amount of MWCNTs were located at the interface of PC-PMMA, while the spreading behavior of PMMA around SAN24 was rather weak and MWCNTs were mostly found in PC phase. The unique phase structure characterized by the spreading of PMMA on SAN32 and the confinement of MWCNTs at the PC-PMMA interface was beneficial for the construction of electrical conduction pathways, as confirmed by the volume resistivities of the composites. It was shown that the volume resistivity of the composite containing SAN32 is lower than that of SAN24 at the same content of MWCNTs. The observed phase morphology was also correlated with the rheological properties of the composites.
공태인(Tai-In, Kong),양석호(Suok-Ho Yang),정철(Chul Cheong) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-
시판되는 활성건조효모 4종을 선택하여 복분자-머루 발효 시 효모균주간의 발효특성을 연구하였다. 실험에 활용된 4종류의 효모는 전반적으로 정상적인 발효패턴을 보였으며 알코올 함량은 각각 11.6%, 11,6%, 11.7%, 11.5%로 비슷한 결과를 보였다. pH는 3.3-3.6 사이이었으며 총산도는 발효 2일째에 가 장 높은 총산도를 보이다가 점차 감소하는 경향을 보였다. 복분자-머루 생과즙의 주요 유기산은 citric acid, tartaric acid 및 malic acid이었으며 발효과정 중 tartaric acid는 약 60-70%로 감소하였고 succinic acid와 lactic acid는 각각 Y1(1297.4 mg/L, 370.8mg/L), Y2(1164.9 mg/L, 256.9 mg/L), Y3(1279.2 mg/L, 193.4 mg/L), Y4(1083.7 mg/L, 192.9 mg/L)로 검출이 되었다. 퓨젤유인 i-amyl alcohol은 Y2 효모에서 유의적으로 높게 검출되었으며, 에스터류 중 ethyl acetate는 30.5-37.8 mg/L로 모든 시험구에서 검출되었으며 succinic acid diethyl ester는 Y1 시험구를 제외한 Y2, Y3, Y4 시험구에서 소량 검출되었다.