| α-Zirconium Phosphate(α-ZrP) is a kind of layered inorganics, it will still keep its layered structure when the guest is inserted into the layers and it is also a filler for the preparation of polymer/layered inorganic nanocomposites due to its high ion-exchange capacity, tunnable size and aspect ratio, and narrow size distribution. However, the high degree of crystallinity and small layer spacing have hindered the well-dispersion ofα-ZrP in polymer. In order to improve the compatibility ofα-ZrP with polymers, a novel method for the preparation of organic modifiedα-ZrP has been presented in this paper. In this novel method, a precursor was obtained afterα-ZrP was intercalated by methylamine. Then the organically-modifiedα-zirconium phosphate had been synthesized through ion-exchange of the methylammonium cations in the precursor with styryl quaternary ammonium ions, which had been prepared from the reaction of N, N-dimethyl octadecylamine with 4-chloromethyl styrene. Then, the nanocomposite had been prepared through melt blending of plystyrene with this organically-modifiedα-ZrP. XRD results indicated that the d-spacing of ZrP-DMA-CMS layers had been enlarged from 0.8 nm to 4.0 nm, while the layer d-spacing of PS/α-ZrP nanocomposites had been enlarged from 4.0 nm to 4.3 nm. Experimental of mechanical properties indicated that polystyrene/α-ZrP nanocomposites with good mechanical properties have been obtained. The tensile strength, stretch modulus, the reputure elongation and impact strength have been increased by 4%, 21%, 8%, 43% respectively at aα-ZrP loading of 1%.Polypropylene/α-ZrP nanocomposites were prepared by melt blending using polystyryl quaternary ammonium salt (CM-PSQAS) as compatibilizer. Then, the morphology, thermal stability and mechanical properties of the nanocomposites have been studied. XRD results indicated that theβ-type crystals of Polypropylene were observed. The results of TGA indicated that the thermal stability of the nanocomposites was enhanced, even at a lowα-ZrP loading of 1%. The thermal degradation temperature was enhanced by 18% compared with the virgin polymer. The heat distortion temperatures of nanocomposites were increased although the increments were minor. The mechanical properties testing results indicated that the tensile strength, tensile modulus and impact strength increased with the increase ofα-ZrP loading, and increments of the tensile strength, stretch modulus and impact strength were 6.5%, 39%, 29% respectively when the loading ofα-ZrP was 5%.In the last chapter, nylon 6/α-ZrP nanocomposites via melt blending of nylon 6 withα-ZrP have been presented. The microstructure, thermal properties and mechanical properties of nanocomposites were studied. XRD results indicated that the content ofγ-type crystal in nylon 6 increased with the adding ofα-ZrP particles. The experimental results of heat distortion temperature indicated that the heat eudurable ability of this composite was enhanced. Among which, the HDT was increased up to 18% compared with the virgin polymer at aα-ZrP loading of 4%. The mechanical properties testing results indicated that the tensile strength and tensile modulus increased with the increase ofα-ZrP loading. The tensile strength and stretch modulus were improved by 23%, 111% respectively at aα-ZrP loading of 4%. However, the reputure elongation and impact strength were decreased with the increase ofα-Zirconium Phosphate.
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