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Sun F.,Ministry of Education Key Laboratory of Advanced Textile Composite MaterialsInstitute of Composite materials | Zhang Y.,Ministry of Education Key Laboratory of Advanced Textile Composite MaterialsInstitute of Composite materials | Chen L.,Ministry of Education Key Laboratory of Advanced Textile Composite MaterialsInstitute of Composite materials | Pan N.,Tianjin Polytechnic UniversityTianjin300387 Peoples Republic of China
Polymer Composites | Year: 2015

This paper presents a comprehensive experimental study and detailed mechanistic interpretations of the shear deformation of three-dimensional (3D) reinforcements. Six types of 3D angle interlock glass fiber preforms (3DAP) were fabricated using a range of weave parameters including the fabric density, fabric layer, and yarn linear density. A modified picture frame was developed to ensure a pure shear load during the test. Through a series of comprehensive tests, our results demonstrated that the fabric density played a key role in the mechanical properties of 3DAP and that the reinforcements with low fabric density and yarn linear density were easy to shear. The shear deformation mechanism was analyzed based on the meso-structure. It is expected that this research will provide preliminary work for building a theoretical model of 3D woven preform. © 2015 Society of Plastics Engineers.


Li K.,Tianjin Polytechnic UniversityTianjin300387 Peoples Republic of China | Chen X.,Tianjin Polytechnic UniversityTianjin300387 Peoples Republic of China | Wang Z.,Tianjin Polytechnic UniversityTianjin300387 Peoples Republic of China | Xu L.,Tianjin Polytechnic UniversityTianjin300387 Peoples Republic of China | And 3 more authors.
Polymer Composites | Year: 2015

In this study, we facilely introduce silver nanoparticles into Poly(N-isopropylacrylamide-co-acrylic acid)(Poly(NIPAM-co-AA)) microgels and specially focus on the effect of hydrophilic acrylic acid segments on the responsive catalytic performance of silver nanoparticles. The obtained Poly(NIPAM-co-AA)/AgNPs composites are characterized by Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The composites as catalysts are applied to the hydrogenation reaction of p-nitrophenol and the related conditions such as reaction temperature, concentration of p-nitrophenol, and the loadings of Ag nanoparticles are studied in detail. NIPAM segments of composites conveniently give silver nanoparticles a controllable characteristic for catalytic reaction by their conformation variation. AA segments of composites not only provide good stability and dispersibility for silver nanoparticles but also favor an easier diffusion of p-nitrophenol to Ag NPs. © 2015 Society of Plastics Engineers.

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