01998nas 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-002333nas a2200241   4500008004100000022001400041245011800055210006900173260008700242300001200329490000700341520139100348653003001739653002101769653001401790653002601804653003101830100002801861700002201889700002101911700002801932856013101960       2013                        eng d  a0954-008300aNew organosoluble aromatic poly(esterimide)s containing pendent pentadecyl chains: synthesis and characterization0 aNew organosoluble aromatic polyesterimides containing pendent pe  a1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLANDbSAGE PUBLICATIONS LTDcNOV  a735-7430 v253 a<p>A new diimide dicarboxylic acid, namely 2,2-(4-pentadecyl-1,3-phenylene)bis(1,3-dioxoisoindoline-5-carboxylic acid), containing preformed imide rings and pentadecyl chain, was synthesized by the reaction of 4-pentadecylbenzene-1,3-diamine with trimellitic anhydride. A series of new aromatic poly(esterimide)s (PEIs) was synthesized using diphenylchlorophosphate-activated direct polycondensation of 2,2-(4-pentadecyl-1,3-phenylene)bis(1,3-dioxoisoindoline-5-carboxylic acid), with five commercially available bisphenols, namely 4,4-isopropylidenediphenol (I), 4,4-(hexafluoroisopropylidene)diphenol (II), 4,4-oxydiphenol (III), 4,4-biphenol (IV), and 4,4-(9-fluorenylidene)diphenol (V) in the presence of pyridine and lithium chloride. Inherent viscosities of PEIs were in the range 0.54-0.83dLg(-1) in chloroform (CHCl3) at 30 +/- 0.1 degrees C. PEIs containing pendent pentadecyl chains were soluble in organic solvents such as CHCl3, m-cresol, N, N-dimethylacetamide, 1-methyl-2-pyrrolidinone, pyridine, and nitrobenzene. Tough, transparent, and flexible films of PEIs could be cast from their CHCl3 solutions. PEIs exhibited glass transition temperature in the range 145-198 degrees C. The temperature at 10% weight loss of PEIs, determined by thermogravimetric analysis under the nitrogen atmosphere, was in the range of 450-470 degrees C indicating good thermal stability.</p>10apendent pentadecyl chains10aPolycondensation10aPolyimide10aPreformed imide rings10aThermogravimetric analysis1 aSadavarte, Nilakshi, V.1 aPatil, Sachin, S.1 aAvadhani, C., V.1 aWadgaonkar, Prakash, P.  uhttps://library.ncl.res.in/content/new-organosoluble-aromatic-polyesterimides-containing-pendent-pentadecyl-chains-synthesis-0