00673nas a2200157   4500008004100000022001400041245011100055210006900166260007100235300001400306490000700320100001900327700002500346700001500371856012900386       2006                        eng d  a0024-929700aPreparation and characterization of sulfonated syndiotactic polystyrene ionomers/organoclay nanocomposites0 aPreparation and characterization of sulfonated syndiotactic poly  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcOCT  a7199-72030 v391 aGovindaiah, P.1 aMallikarjuna, S., R.1 aRamesh, C.  uhttps://library.ncl.res.in/content/preparation-and-characterization-sulfonated-syndiotactic-polystyrene-ionomersorganoclay-001998nas a2200229   4500008004100000022001400041245007300055210006900128260005700197300001200254490000700266520118700273653002201460653001501482653003301497653003101530653003701561100002001598700001901618700002101637856011001658       2009                        eng d  a0170-083900aPolypropylene-organoclay nanocomposites containing nucleating agents0 aPolypropyleneorganoclay nanocomposites containing nucleating age  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcDEC  a897-9090 v633 a<p>Polypropylene/organoclay nanocomposites containing nucleating agents, viz., aluminum hydroxybis[2,2-methylenebis(4,6-di-tert-butylphenyl) phosphate (NA21) and 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol (Millad 3988), were prepared by direct melt intercalation in a twin-screw extruder. Nucleating agents were added to polypropylene during compounding and their effect on the properties of the nanocomposites was studied. X-ray diffraction (XRD) and transmission electron microscopy (TEM) exhibited clay layers to be intercalated and partially exfoliated. The expansion of inter-gallery distance of the clay layers was governed by the interaction between polypropylene, compatibilizer, and different nucleating agents. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) indicated higher thermal stability and crystallization temperature for nanocomposites compared to virgin polymer. Even a small addition of the nanoscale filler with 0.2% nucleating agents was found to promote concurrently several PP material properties, including improved tensile characteristics, higher Young's modulus, increased thermal stability and rate of crystallization.</p>10aNucleating agents10aorganoclay10aPolypropylene nanocomposites10aThermogravimetric analysis10atransmission electron microscopy1 aGhugare, S., V.1 aGovindaiah, P.1 aAvadhani, C., V.  uhttps://library.ncl.res.in/content/polypropylene-organoclay-nanocomposites-containing-nucleating-agents-0