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Poly (1,4-dioxan-2-one)/montmorillonite Nanocomposites: Preparation, Structures and Properties

Author: HuangFuYun
Tutor: WangYuZhong
School: Sichuan University
Course: Polymer Chemistry and Physics
Keywords: Montmorillonite Nanocomposites Situ intercalation Poly DIOXANONE Rheological
CLC: TB383
Type: Master's thesis
Year: 2005
Downloads: 137
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Abstract


In recent years, polymer / clay nanocomposites showed excellent performance due to the great interest of the people. The thickness of the layer of clay tablets generally about 1nm them to the individual sheet layers uniformly dispersed in the polymer matrix, to improve not only the original performance of the composite material, and exhibits many new properties. Now study more flaky clay, sodium montmorillonite (MMT-Na). Laminar structure of montmorillonite is an aluminoxane entrainment octahedral wafer constituting two silicon-oxygen tetrahedral intermediate, since a portion of Si in the silicon-oxygen tetrahedra 4 and aluminoxane octahedral Al the 3 easily Mg 2 replaced by excess negative charge, and therefore these lamellae. In order to maintain electrical neutrality, these excess negative charge is compensated by cations adsorbed in the interlayer Adsorption between the montmorillonite layer the of Ca 2 the Na hydrated cations, they easily with organic or inorganic cation exchanged layer spacing changes through appropriate The method allows the polymer to form a nano-composite material is inserted into between the MMT. Have been successfully prepared many polymer / clay nanocomposites. With hydroxy functional groups of the alkyl quaternary ammonium salts and alkyl quaternary ammonium salts in general organic treatment of the sodium montmorillonite, organic montmorillonite making it. X-ray diffraction (XRD) analysis shows that the organic cations has occurred with the sodium ion ion exchange, resulting in the layer spacing increases. The use of environmentally friendly situ intercalation compound prepared poly inserted dioxanone / montmorillonite (PPDO / MMT) nano-composites of polymer structure and properties of nanocomposites, include the following two parts parts: situ Intercalation Polymerization Preparation of poly dioxanone / montmorillonite (PPDO / MMT) nanocomposites MMT on the different types of poly-dioxanone cyclohexanone / Montmorillonite the influence of the intrinsic viscosity number of nano-composite materials, and montmorillonite in the polymerization reaction to accelerate the polymerization reaction rate was studied. The use of the structure of the composites, XRD, and TEM characterization, thermal gravimetric analysis method (TGA) to study the thermal behavior, showing differential scanning amount of heat method (DSC) and thermal polarized light microscopy (POM) analysis of its crystallization behavior and crystalline morphology. In addition to its mechanical properties and biodegradability tests to study the rheological properties of high-pressure capillary rheometer, a preliminary study its blown film feasibility. Conclusions are as follows:

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