| 2009th Bachelor |
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Title:The Synthesis and Characterization of Polypyrrole /Cyclodextrin Homogeneous Polypseudoroxane Structure Writer:Shiqiang Cao Supervisor: Wei Wu Abstract:Abstract: To attain the ideal structure of polypseudoroxane (polypyrrole/cyclodextrin) which is potentially used for molecular conducting wire, polypyrrole/cyclodextrin (ppy/CD) complex was synthesized by chemical oxidative polymerization of pyrrole in the presence of α-CD and β-CD. The elemental analysis suggested that the molar ratio of α-CD to pyrrole was 1:5 and β-CD to pyrrole was 1:24. The SEM and TEM showed that the ppy/α-CD had the best orientation and organization comparing with pure ppy and ppy/β-CD. The FT-IR spectra and wide-angle X-ray diffraction pattern showed that the Py-α-CD rotaxanes presented in the polypyrrole (PPy) chains. Because of the uncontinuous presence of Py-α-CD rotaxanes, the conductive behavior and thermal stability of the complex was greatly different with the pure PPy. Meanwhile, this work analyzed the reaction mechanism in the microscopic-view to explain why the homogeneous polypseudoroxane (α-CD:pyrrole=1:1) didn’t generate.
Title:The Synthesis and Characterization of Polypyrrole /Cyclodextrin Homogeneous Polypseudoroxane Structure Writer:Yuxing Xu Supervisor: Wei Wu Abstract:Literature Review of this paper describes the performance of EVA and its application, the performance, modified and the application technology of nylon 6, but also to do a brief overview of malefic anhydride and organic montmorillonite. The experimental part introduced various processing conditions of EVA-g-MAH and montmorillonite modified nylon 6 nanocomposites. Also under different processing conditions, focus on analysis the mechanical properties, thermal properties and crystalline of EVA-g-MAH and montmorillonite modified nylon 6 nanocomposites. Different processing conditions, the performance of nanocomposites is varied, the different order of several raw materials mixed on, also will have an impact to the various properties of composite materials.
Title:The Preparation and Properties Researching of Polycarbonate Elastomer Composite Toughening Nylon 6 Writer:Qi Qian Supervisor: Wei Wu Abstract: The research focused on a new kind of super-tough engineering plastic based on PA6/PC alloys. The processing technology of this polymer alloy is briefly introduced. By adding of chain extender (HDI) and thermo plastic elastomer (POE), PA6/PC alloys were prepared via reactive extrusion. Novel toughening alloy is gained with outstanding mechanical properties and thermal properties. Toughening mechanism was studied, and the relationship between properties and the multi-network structure was analyzed.
Title:The Preparation Characterization and Properties Studying of Emulsion Polymerization of Poly(styreneacrylamide)/Montmorillonite Core-shell Structure Writer:Xiaorong Wu Supervisor: Wei Wu Abstract: In this experimentation (polystyrene-polyacrylamide)/organic montmorillonite particles were synthesized via emulsion polymerization. The core of the multilayered core-shell structure was montmorillonite, the inner tier shell was polystyrene and the outermost shell was polyacrylamide. The morphology and structure of core-shell structure was characterized by XRD, FT-IR, TEM, SEM, Particle Size Analyzer, respectively. Core-shell structure particles were used to toughen Nylon 6 as a toughener and their influence on the properties of PA6 composites was also investigated.
Title:Polycarbonate Silicone Rubber Composites Toughening-enhanced Nylon 66 Engineering Plastics and Its Performance Study Writer:Yi You Supervisor: Wei Wu Abstract: We have analyzed and researched the structure, performance, and application of the PA/PC engineering materials and forecasted its market. Through the discussion of the silicon rubber and its dynamic vulcanization based on the IPN theory, a new way to prepare the material was given. We have designed and finished the preparation of the toughness-enhanced nylon-66 and the performance test of the new material. The improvements of the mechanical and thermodynamics properties were proved in different angles and all of these indicate the potential of the new material.
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