A low loading of grafted thermoplastic polystyrene strengthens and toughens transparent epoxy composites †

Content Provider	Semantic Scholar
Author	Gu, Hongbo Ma, Chao Liang, Chaobo Meng, X. T. Gu, Junwei Guo, Zhanhu
Copyright Year	2017
Abstract	Transparent epoxy composites strengthened and toughened by thermoplastic polystyrene grafted with epichlorohydrin (g-PS) have been prepared at low loading levels. The polymer backbone of PS was manipulated by the epoxide and hydroxyl groups confirmed by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). Contact angle and differential scanning calorimetry (DSC) tests indicated that the grafting process could decrease the surface tension and increase the compatibility between PS and epoxy resins. The effects of g-PS loading and the grafting process on both the viscosity of liquid epoxy resin suspensions as well as the physicochemical properties of cured epoxy composites have been systematically investigated. The cured g-PS/epoxy composites demonstrated an enhanced tensile strength (maximum of 97.4 MPa) compared to either cured pure epoxy (77.6 MPa) or PS/epoxy composites (79.1 MPa). The modulus of toughness for g-PS/epoxy composites reaches values of up to 355.9 MJ m , which is respectively 176.6 and 141.1% higher than those for cured pure epoxy and PS/epoxy composites. The uniform g-PS distribution in the cured g-PS/epoxy composites was observed by scanning electron microscope (SEM). The glass transition temperature (Tg) of cured g-PS/epoxy composites was shifted to a higher temperature (increased by 16.3 1C) in the dynamic mechanical analysis (DMA) compared with that of cured pure epoxy (111.7 1C). The strong interfacial interaction obtained between g-PS and the epoxy matrix was responsible for the enhanced mechanical and thermal mechanical properties. This work provides a new insight into the investigation of interaction and compatibility between thermoplastic and thermoset materials.
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Alternate Webpage(s)	http://composites.utk.edu/papers%20in%20pdf/c7tc00437k.pdf
Language	English
Access Restriction	Open
Subject Keyword	3-Mercaptopropionic Acid Calorimetry Calorimetry, Differential Scanning Epichlorohydrin Epoxy Compounds Epoxy Resins Fill Graph toughness Hydroxyl Radical Internet backbone Medical Device Incompatibility Problem Microscope Device Component Microscopes, Electron, Scanning Modulus robot Natural Science Disciplines Photoelectric effect Polymer Polystyrenes Ps (Unix) Resin Scanning Electron Microscopy Spectroscopy, Fourier Transform Infrared Surface Tension Suspensions Transplanted tissue Truevision TGA Vertebral column X-Ray Computed Tomography X-Ray Emission Spectroscopy X-Ray Photoelectron Spectroscopy phosphatidylserine ps-hr protein, Rabbitpox virus tensile strength xian ling gu bao
Content Type	Text
Resource Type	Article