Synthesis of Polymer in Supercritical Carbon Dioxide
نویسندگان
چکیده
منابع مشابه
Synthesis of cross-linked polymer microspheres in supercritical carbon dioxide
Herein we report the synthesis of highly cross-linked polymers based on divinylbenzene by heterogeneous polymerization in supercritical CO2 (scCO2). The polymers were isolated in the form of discrete microspheres (diameter = 1.5–5 lm) in good yields (F90%), in the absence of any stabilizers. In the presence of a CO2-soluble polymeric stabilizer, much smaller particles (diameter a0.5 lm) were fo...
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In the present investigation efforts have been made to synthesis polyvinyl pyridine (PvPy) /C60 conjugates through 2, 2-azobisisobutyronitrile (AIBN) initiated insitu polymerization of PvPy in scCO2.The process of synthesis was monitored under different reaction conditions ranging 1200-1800psi, 60-90 oC over 6 hours. The progress of polymerization was monitored rheoviscometrically. The concentr...
متن کاملsynthesis of polyvinyl pyridine/c60 conjugates in supercritical carbon dioxide*
in the present investigation efforts have been made to synthesis polyvinyl pyridine (pvpy) /c60 conjugatesthrough 2, 2-azobisisobutyronitrile (aibn) initiated insitu polymerization of pvpy in scco2.the processof synthesis was monitored under different reaction conditions ranging 1200-1800psi, 60-90 oc over 6hours. the progress of polymerization was monitored rheoviscometrically. the concentrati...
متن کاملLow-density polymer thin film formation in supercritical carbon dioxide
We report a method for producing stable low-density polymer films by using supercritical carbon dioxide (scCO2). Two different molecular weight polystyrene films with various thicknesses were exposed to scCO2 along the density fluctuation ridge in P – T phase diagram. The swollen structures could be then frozen by flash evaporation of CO2 without forming additional voids. X-ray reflectivity dat...
متن کاملStructure and Rheology of Supercritical Carbon Dioxide Exfoliated Polymer Nanocomposites
A major technological barrier to achieving superior properties of nano-structured composite materials is the difficulty of dispersing fillers uniformly in a host matrix. The existing nanocomposite manufacturing processes achieve property improvements through chemical modifications of filler structures and utilization of chemical interactions between the chemically modified fillers and matrix po...
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ژورنال
عنوان ژورنال: Kobunshi
سال: 2008
ISSN: 0454-1138,2185-9825
DOI: 10.1295/kobunshi.57.449