Lanthanum stearate

Figure 6.7. Activation energy of iPP crystallization vs. concentration of nucleating agent (complex of stearic acid and lanthanum stearate). [Data from Yi, Q-F Wen, X-J Dong, J-Y Han, C C, Polymer, 49, 5053-63, 2008.]...

Lanoxide-52. See PEG-40 stearate Lanoxide-53. See PEG-50 stearate Lanoxide-59. See PEG-100 stearate Lanoxide-eooODS. See PEG-150 distearate Lanpol 5. See PEG-5 lanolate LanpoHO. See PEG-10 lanolate Lanpol 20. See PEG-20 lanolate Lanthana. See Lanthanum oxide Lanthanum... 

Figure 16.35 (Plate 5). Top left lanthanum myristate (Lamy), lOOx crossed polars, gypsum plate in, 120.TC - smectic C. Top right Lamy, lOOx crossed polars, gypsum plate in, 152.3°C - smectic C Middle left lanthanum palmitate, lOOx crossed polars, gypsum plate in, 126.3°C - smectic C. Middle right Lamy, lOOx crossed polars, gypsum plate in, 152.3°C - immediately post melting. Bottom left cerium stearate (Cest), lOOx crossed polars, 79.6°C - lamellar. Bottom right Cest, lOOx crossed polars, gypsum plate in, 124.0°C - smectic C...

Polymers may crystallize in different structures, for example, isotactic PP is known to crystallize in a, jS, y and smectic structures (7). Nucleating agents may favor specific types of crystallites. For isotactic PP, stearic acid and stearate lanthanum complexes are jS-nucleating agents. Similarly, cadmiumbicyclo[2.2.1]hept-5-ene-23-dicarboxyl-ate is a j3-nucleating agent (8). 

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