Two master-batches,polyamide 66 (PA66)/organo-montmorillonite (OMMT) and polyamide 6 (PA6)/OMMT, prepared by melt compounding with methyl methacrylate (MMA) as co-intercalation agent,have been used to prepare nearly e...Two master-batches,polyamide 66 (PA66)/organo-montmorillonite (OMMT) and polyamide 6 (PA6)/OMMT, prepared by melt compounding with methyl methacrylate (MMA) as co-intercalation agent,have been used to prepare nearly exfoliated PA661montmorillonite (MMT) nanocomposites.The resulting nanocomposites are compared in view of their morphology and properties.Nano-scale dispersion of OMMT is realized in both types of nanocomposites,as revealed by XRD,TEM and Molau tests.PA66/MMT nanocomposites having superior mecha...展开更多
Zr-pillared clays were prepared by heating and ultrasonic methods in intercalation process. The resultants were characterized by XRD, N2 adsorption-desorption, SEM, and TG/DTA analysis. Ultrasonic technology accelerat...Zr-pillared clays were prepared by heating and ultrasonic methods in intercalation process. The resultants were characterized by XRD, N2 adsorption-desorption, SEM, and TG/DTA analysis. Ultrasonic technology accelerated the pillaring process effectively and obtained better ordered structure than by heating method. The specific surface area and pore volume of the Zr-pillared clays increased by about 13 and 3 times respectively. Rare earth metal （Ce） was introduced into Zr-pillared clays by co-intercalation and dipping method. The specific surface area was increased by co-intercalation approach, but it was decreased dramatically by dipping method. Thermal stability of Ce modified samples prepared by co-intercalation method was enhanced in comparison with Zr-pillared clays. Modification mechanism and ＂corrugation-like＂ structural mode of intercalation process was proposed basing on the double XRD peaks in small-angle range of pillared clays, which was related to the deformation of silicate layer.展开更多
文摘Two master-batches,polyamide 66 (PA66)/organo-montmorillonite (OMMT) and polyamide 6 (PA6)/OMMT, prepared by melt compounding with methyl methacrylate (MMA) as co-intercalation agent,have been used to prepare nearly exfoliated PA661montmorillonite (MMT) nanocomposites.The resulting nanocomposites are compared in view of their morphology and properties.Nano-scale dispersion of OMMT is realized in both types of nanocomposites,as revealed by XRD,TEM and Molau tests.PA66/MMT nanocomposites having superior mecha...
基金Funded by the National Basic Research Program of China(No.2004CB719501)the PetroChina Company Limited for Science Technology Venture Innovation Program(No.050511-3-2)
文摘Zr-pillared clays were prepared by heating and ultrasonic methods in intercalation process. The resultants were characterized by XRD, N2 adsorption-desorption, SEM, and TG/DTA analysis. Ultrasonic technology accelerated the pillaring process effectively and obtained better ordered structure than by heating method. The specific surface area and pore volume of the Zr-pillared clays increased by about 13 and 3 times respectively. Rare earth metal （Ce） was introduced into Zr-pillared clays by co-intercalation and dipping method. The specific surface area was increased by co-intercalation approach, but it was decreased dramatically by dipping method. Thermal stability of Ce modified samples prepared by co-intercalation method was enhanced in comparison with Zr-pillared clays. Modification mechanism and ＂corrugation-like＂ structural mode of intercalation process was proposed basing on the double XRD peaks in small-angle range of pillared clays, which was related to the deformation of silicate layer.
