Darstellung,Eigenschaften und Molekülstrukturen von chiralen Dimethylaluminium-aminoalkoxiden

Preparation, Properties, and Molecular Structures of Chiral Dimethylaluminum Amino Alkoxides Dimethylaluminium-2-piperidylmethoxide ( 1 ), N-methyl-3-piperidyloxide ( 2 ), R(–)-2-aminobutoxide ( 3 ) and cis-1 R, 2 S-2-N-benzylaminocyclohexyl-1-methoxide ( 4 ) were obtained by reaction of Me₃Al with the corresponding aminoalkohols in n-pentane. The compounds were characterized by ¹H, ¹³C, and ²⁷Al n.m.r. spectroscopy. The molecular structures of 1 , 3 , and 4 were determined by X-ray diffraction. The compounds form oxygen-bridged dimers and in consequence of an Al–N interaction two additional chelate rings. The bond distances of the central Al₂O₂ ring correspond with 1.9 Å to those of known dialkylaluminumalkoxides. The Al–N bond distances run to 2.18 Å which indicates a strong EDA interaction.     

Controlled architectures and property synergisms of polypropene/polyamide 6 blends prepared via reactive processing

Variation of molecular architectures of blend compatibilizers and reactive processing reaction conditions gave excellent control on morphology development and toughness/stiffness balance of polypropene/polyamide 6 blends. Basic structure/property relationships of blends containing discrete PA6 phases, PA6 nanoparticle cores encapsulated in a rubber shell, dispersed PA6 particles with rubber subinclusions, and percolation structures of agglomerated core/shell particles were investigated. Deformation behavior of percolation structures were analyzed by means of high-voltage transmission electron microscopy.