"Designer" Nucleating Agents for Polypropylene

Titelangaben

Blomenhofer, Markus ; Ganzleben, Sandra ; Hanft, Doris ; Schmidt, Hans-Werner ; Kristiansen, Magnus ; Smith, Paul ; Stoll, Klaus ; Mäder, Dietmar ; Hoffmann, Kurt:
"Designer" Nucleating Agents for Polypropylene.
In: Macromolecules. Bd. 38 (2005) Heft 9 . - S. 3688-3695.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma0473317

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Abstract

We report the discovery of a family of organic compounds, substituted 1,3,5-benzenetrisamides, that-depending on subtle details of their chemical structure-are capable of selectively and extremely efficiently nucleating the growth of the common-crystal modification of the major industrial polymer isotactic polypropylene (i-PP), rendering this normally turbid material highly transparent ("clarified") at exceedingly low concentrations (as low as a weight fraction of 0.0002), inducing the mechanically distinct, tough i-PP -polymorph, or promoting growth of hybrids of both crystallographic modifications with heretofore unknown combinations of the above desirable optical-mechanical properties. In addition, these trisamide-based compounds exhibit excellent thermal stability and do not feature absorption of visible light, adding to a most favorable set of characteristics that provides marked benefits over the presently employed nucleating/clarifying agents.