Eine neue Theorie zur Rotationsumwandlung der n-Paraffine (Kinkentheorie)

Triclinic lattice constants of saturated mono-acid triglycerides

“…No kink effects have been established, however, in the very densely packed triclinic chain arrangements. Previous discussions of such lattice defects referred exclusively to the less dense chain packings of the orthorhombic modifications of paraffins (Blasenbrey & Pechhold, 1967), polyethylene (Pechhold, 1968), triglycerides (Precht, Frede & Greiff, 1978), or to the system tetradecylammonium beidellite/ tetradecanol (Lagaly, Fitz & Weiss, 1975). In all possible configurations fl(4,1,0) and fl(4,-1,1) structures with periodicities in the area of terminal groups of fatty acids ... NL~ N... and ... NNN... and relative chain positions 3:3 and l:l would provide a satisfactory interpretation of the measured long spacings.…”

Kink Block Structures in Clay Organic Complexes

“…From the great number of possible conformation isomers, only a relatively small number are of importance in more or less regular structures. These are discussed in the papers of Pechhold about phase transitions in paraffins and relaxation properties of polymers (Pechhold, 1968;Blasenbrey and Pechhold, 1967).…”

“…Kink and gauche block arrangements have been proposed for the structure in melts of polyethylene and long chain paraffins (Pechhold and Blasenbrey, 1967;Blasenbrey and Pechhold, 1970). Using statistical thermodynamics and experimental data about melting enthalpies, specific volume changes, pressure dependency of the melting points, expansion coefficients and compressibilities, Pechhold assumed melting of these long chain alkyl compounds to be connected with a sudden increase in kink concentration from a lower limit of about 0-02 kinks/-CH2-to a value of about 0.25 kinks/-CH2-.…”

Phase Transitions in Complexes of Nontronite with n-Alkanols

“…(= 2g3 kink). Recently, kink isomers are supposed to cause the rotational phase transition in paraffin crystals (Blasenbrey and Pechhold, 1967) and to contribute to the relaxation properties of polymers (Pechhold, 1968;Pechhold and Blasenbrey, 1970).The model in Fig. 4 shows how the formation of kinks near the interlayer cations produce kink block structures.…”