Preparation of poly(methyl methacrylate)/clay nanocomposites using supercritical fluid process

Title
Preparation of poly(methyl methacrylate)/clay nanocomposites using supercritical fluid process
Authors
Hyun Taek Jung이상수박민김희숙임순호
Keywords
supercritical; HCFC-22; clay; fluorinated surfactant; PMMA
Issue Date
2012-12
Publisher
Composite interfaces
Citation
VOL 19, NO 9, 565-572
Abstract
Organoclay-based poly(methyl methacrylate) (PMMA) nanocomposites were prepared using a chlorodifluoromethane (HCFC-22) solvent by the supercritical fluid process. Mechanical properties, transmission electron microscopy (TEM), wide angle X-ray diffraction (WAXD), and thermal stability were characterized for PMMA nanocomposites. Commercially available organoclays (ASM clay) treated with alkyl ammonium salt, such as Cloisiteⓡ 15A and Cloisiteⓡ 30B, were compared with lab-made organoclays (FSM clay); specifically, sodium montmorillonite modified with a fluorinated surfactant. Ultrasonic treatment in the preparation of FSM clay was also investigated. Since the fluorinated tail in FSM clay is compatible with HCFC-22, FSM clay processed with ultrasonication showed partial exfoliation for PMMA/FSM clay nanocomposite, resulting in better thermal and mechanical properties and higher glass transition temperature as opposed to the intercalation morphologies for PMMA/ASM clay.
URI
http://pubs.kist.re.kr/handle/201004/45057
ISSN
09276440
Appears in Collections:
KIST Publication > Article
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