Advanced Materials Research Vols. 915-916

Abstract: The paper describes the static and vibration analysis of composite wind turbine blade with different lamination methods by using finite element method. E-glass/epoxy orthotropic material L900 and DBL800 were employed for reinforcing the structural strength of wind turbine blade. The zero degree directional lamination method, 90 degree directional lamination method and [0,±45,9s quasiisotropic lamination method were used for investigating the structural stability of composite laminate wind turbine. The bending condition and rotational speed were mainly considered in stress and deformation analysis. As shown in the results, the quasiisotropic lamination method shows the best result for modeling the fiber reinforced composite wind blade.

Abstract: The structure design and manufacturing of the fan blade ware researched based on large-scale temperature change, high-revolution, multi-constraint conditions, high-fidelity profile and so on. The numerical modeling was performed in MSC, including strength, stiffness as well as eigenfrequency analysis, optimized to layer thickness and mass of blade. The resin transfer molding (RTM) process was used to ensure the blade geometrical tolerance. Multiform tests were provided to verify that the design and manufacturing is reasonable and the blade satisfies with application requirement.

Abstract: This paper analyzes the properties of fibre reinforced composite materials, which are used for the improvement or reform of Wushu equipment so as to promote Wushu cultural heritage. Reinforced composite materials can help promote the reform or improvement Wushu protective gear and target, Wushu performance or fitness appliances, expressing Wushu moves better and highlighting its artistic attribute . Besides, this paper also expounds strengthening the popularization of Wushu to provide help for improving the traditional Wushu conditions as well as strong support for the development of Wushu athletics and Wushu standardization.

Abstract: Amphiphilic multiwalled carbon nanotubes PMAA-g-MWCNT-g-PSt were prepared by grafting linear triblock copolymer PtBMA100-b-PGMA19-b-PSt101 onto the carboxyl multiwalled carbon nanotubes surface with an oxirane cleavage reaction. The ratio of intensity between D band and G band and the shifting of these bands in Raman spectroscopy showed good agreement with fourier transform infrared spectroscopy especially the appearance of the characteristic group of benzene ring at 673 cm-1 for PMAA-g-MWCNT-g-PSt. Thermogravimetric analysis showed that the contents of polymer grafted on the surface of carboxyl multiwalled carbon nanotubes were 36 % and 55 % for PMAA-g-MWCNT-g-PSt and PtBMA-g-MWCNTs-g-PDMAEMA, respectively. The introduction of the cinnamic group into PtBMA100-b-PGMA19-b-PSt101 induced the activation energy of PMAA-g-MWCNT-g-PSt much higher than that of PtBMA-g-MWCNTs-g-PDMAEMA after 238 oC during their thermal decompositions.

Abstract: Carboxylic waterborne polyurethane was synthesized with isophorone diisocyanate (IPDI), polyether glycol (PPG) and 2,2-bis (hydroxymethyl) propionic acid (DMPA) as major materials, and terminated with C=C by using β-hydroxyethyl ethacrylate (HEMA). And then 2, 2-azobis (isobutyronitrile) (AIBN) and cumene hydroperoxide (CHPO)/tetraethylenepentamine (TEPA), as a representative of different kinds of initiators, were employed to prepare SiO₂/polymer composites via double in situ miniemulsion polymerization, in which the prepared waterborne polyurethane was used as a reactive surfactant. The morphology of SiO₂/polymer, the microstructure and thermal properties were characterized and discussed. The results indicated that the morphologies of SiO₂/polymer composites initiated by AIBN with waterborne polyurethane as surfactant, which showed core-shell microcapsulated structure with SiO₂ microsphere fabricated inside the shells of polymer, were different from the products prepared by conventional surfactant. Morphological evolution of the particles with polymerization and their dependence on types of initiator played key roles in achieving the microencapsulated shapes.

Abstract: Spinous spheres of Mn₃O₄ nanoparticles have been successfully prepared using cationic monomer doped manganese acetate as precursory solid and thermal decomposition at 400 oC. The product was characterized by X-ray powder diffraction and scanning electron microscope. The adsorption performance of spinous spheres composed of Mn₃O₄ for 1-Naphthyl ethylene diamine-4-azobenzene-4-sulfonic acid was investigated. The adsorbent showed high efficiency for the decolorization of 1-Naphthyl ethylene diamine-4-azobenzene-4-sulfonic acid for in contaminated water.

Abstract: The composites of PP/Talc modified by stearic acid were prepared and its effect on the properties of PP/Talc composites was investigated in this paper. The tensile strength and impact strength of PP/Talc composites increased about 15% and 30% compared with pure PP respectively. Based on surface analysis by scanning electron microscope (SEM), the Talc particles buried well in PP matrix when the Talc was coated with the stearic acid. At the same time, it was found that Talc significantly increased the crystallization temperature and crystallization rate of PP by differential scanning calorimetry (DSC).

Abstract: A great amount of work has been done over the past few years to use the glass fibers reinforcing polypropylene (PP) composites. Due to the sharp resources recovery, and the global demand for fiber materials, there has been growing interest in the use of the recycled glass fibers (GF) (RGF) as an alternative. This work focuses on the reinforcing mechanisms of the glass fibers in PP composites. The reinforcing mechanism is evaluated by scanning electron microscopy (SEM) on the basis of the energy dissipation theory. The GF are the excellent supporting bodies. Interfacial debonding, fiber pullout and breakage dissipate tremendous energy. These factors cause improvements in the strength of the RGF/PP and MGF/PP composites.

Abstract: Subsea tunnel develops rapidly and has a good prospect, but bad service environment, maintenance of a high degree of difficulty and cost make its durability to be a serious study issue. Owing to Darcy law and pressure change law, moisture seepage rule in unsaturated concrete is analyzed. Establish the theoretical models about the pressure head and flow rate change with the location and time, concluded that the penetration depth formula. On this basis, convection-diffusion equation of chloride under pressure is solved where an analytical solution is obtained. The above theoretical model is applied to engineering example to prove it can meet the design life.

Abstract: It has brought an attention to compatibility, which plays a key role in the development of high performance polymer alloy. This article mainly aims to give an overview of how reactive compabilizer apply to polymer alloy,such as External Reactive Compatibilizers, Blended-Component Functionalization, compatibilization change using ionomer in blends, Compatibilization on low molecular weight compound, and outlook of development in polymer alloy technology.