Ibrahim N. Hassan

In this paper the polymer nanocomposite of nickel zinc (NiZn) ferrite nanoparticles incorporated into the thermoplastic natural rubber nanocomposite (TPNR) were prepared via melt blending method. The effect of different NiZn loading (2-10 wt%) on morphology, tensile and dynamic mechanical properties of the obtained composites was investigated. It was found that NiZn ferrite is well dispersed in the thermoplastic natural rubber matrix. The tensile results indicated that filler loading has improved the tensile strength and Youngs modulus of the nanocomposite. However, the elongation at break decreased with increasing the percentage of NiZn. Dynamic mechanical test showed that the highest storage modulus is at 8 wt% filler. Any further increment of the filler content leads to the formation of agglomerate hence affecting the properties. The Scanning electron micrograph (SEM) micrographs reveal aspect ratio and filler orientation in the TPNR matrix also strongly promoted interfacial adhesion between the filler and the matrix to control its properties.

In the title compound, C(12)H(12)N(2)O(3)S·2C(2)H(6)OS, the acetic acid and cinnamoyl groups adopt Z and E configurations, respectively, with respect to the thio group about the C-N bonds. The components of the asymmetric unit are connected by N-H⋯O and O-H⋯O hydrogen bonds and in the crystal weak inter-molecular C-H⋯O and C-H⋯S hydrogen bonds further connect the components into chains along the b axis. In the main mol-ecule, an intra-molecular N-H⋯O hydrogen bond is also present.

In the title compound, C(22)H(19)FN(2)OS, the 2-fluoro-benzoyl group adopts a trans conformation with respect to the thiono S atom across the N-C bond. In the crystal, inter-molecular N-H⋯S, C-H⋯S and C-H⋯O hydrogen bonds link the mol-ecules, forming a two-dimensional network parallel to (101).

The thiono and carbonyl groups in the title compound, C(21)H(18)N(2)O(2)S, adopt an anti disposition with respect to the central C-N bond. The diphenyl-amine rings are twisted relative to each other by a dihedral angle of 82.55 (10)°. The 3-meth-oxy-benzoyl fragment is twisted relative to one of the diphenyl-amine rings, forming a dihedral angle of 74.04 (9)°. In the crystal, pairs of inter-molecular N-H⋯S hydrogen bonds link the mol-ecules into centrosymmetric dimers, forming columns parallel to the a axis.

In the title compound, C(22)H(19)ClN(2)OS, the thiono and carbonyl groups are trans positioned with respect to a partially double C-N bond. The amide group is twisted relative to the thio-urea fragment, forming a dihedral angle of 46.75 (11)°. In the crystal, inter-molecular N-H⋯S and C-H⋯O hydrogen bonds link the mol-ecules into a one-dimensional polymeric structure parallel to the c axis.

The 2-bromo-benzoyl group in the title compound, C(22)H(19)BrN(2)OS, adopts an E conformation with respect to the thiono S atom across the N-C bond. In the crystal structure, the mol-ecule is stablized by N-H⋯O inter-molecular hydrogen bonds, forming a one-dimensional chain along the b axis.

In the title compound, C(12)H(14)N(2)O(3)S, the propyl acetate group and the benzoyl group adopt a cis-trans conformation, respectively, with respect to the thiono S atom across the C-N bonds. The phenyl ring is twisted relative to the the thio-urea mean plane, forming a dihedral angle of 24.16 (9)°. An intra-molecular N-H⋯O hydrogen bond occurs. The crystal packing is stabilized by inter-molecular N-H⋯O and C-H⋯O hydrogen bonds, forming a chain along the a axis.