화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.25, No.3, 145-152, August, 2013
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Effect of supercritical carbon dioxide as an exfoliation aid on bio-based polyethylene terephthalate glycol-modified/clay nanocomposites
Kwangho Jang, Jae Wook Lee, In-Kwon Hong1, and Sangmook Lee1, †
  • Applied Rheology Center, Department of Chemical and Biomolecular Engineering, Sogang University, Mapo-gu, Seoul 121-742, Republic of Korea
  • 1Division of Chemical Engineering, Dankook University, Suji-gu, Yongin, Gyeonggi-do, 448-701, Republic of Korea
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Bio-based PETG (bio-based glycol modified polyethylene terephthalate, Ecozen T95) / clay (organo-modified montmorillonite, OMMT, C10A) nanocomposites were prepared by co-rotating twin screw extruder attached with supercritical carbon dioxide (scCO2) injection system. The effects of nano-clay and scCO2 on the properties of PETG/clay nanocomposites were investigated by measuring thermal, rheological, tensile, impact, and barrier properties. The thermal and mechanical properties decreased with increasing nano-clay content, but they recovered or even exceeded the properties of neat PETG as scCO2 was added. It was verified due to a good dispersion of the nano-clay in PETG matrix for PETG/clay nanocomposites by XRD, SEM, and TEM. It was thought that scCO2 could be an effective exfoliation agent for many nanocomposites systems as well as for bio-based PET/clay nanocomposites.
Keywords:supercritical carbon dioxide;bio-based PETG;nanocomposite;nano-clay;exfoiliation
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