A series of liquid polysulfide thiourethane acrylate prepolymers were synthesized by the reaction of liquid polysulfide with isocyanate and hydroxyethyl acrylate. With and without a combination of acrylic monomers, the prepolymers were cured with ultraviolet radiation. The films exhibited a higher soft-segment glass-transition temperature than metal oxide cured polysulfide. With the addition of a diluent, the tensile strength and modulus increased, whereas the ultimate elongation decreased. The polysulfide backbone, combined with the crosslink generated from the photopolymerization of acrylic, produced films with superior oil resistance.

A series of polysulfide-based polyureas with different siloxane contents were synthesized, and they were based on isophorone diisocyanate, liquid polysulfide oligomer, aminoethylaminopropyl poly(dimethyl siloxane) (AEAPS), and 2,5-diamino-3,6-dimethylmercapto-toluene. The mechanical and surface properties were investigated with attenuated total reflectance Fourier transform infrared spectroscopy, surface contact angles, electron spectroscopy for chemical analysis, and stress-strain analysis. Siloxane was enriched on the surfaces of these elastomers, and the tensile properties of the elastomers did not change markedly with the AEAPS modification.

In the experiment of the behaviour of the connection between steel beam and concrete wall, surface FBG sensor and resistance strain gauge were located at the same measuring point of the flange girth of the steel beam. Measuring results show that the measuring effectiveness of both methods is uniform. And the surface FBG sensor has the merits of using conveniently and non-vitiating. So using surface FBG sensor to measure the surface strains of structural members in structure experiment is feasible.

Phenolic-latex film is used to coat on fiberglass surface to protect and supply fiberglass an intensive and adhesive coating for reinforcing fiber/rubber composite purpose. A series of p-alkylphenol was introduced to modify the hydrophobicity of resorcinol- formalin-latex (RFL) film surface and to prepare a p-alkylphenol-resorcinol-formalin-latex (ARFL) film, which alkyl carbon number was 1, 4, 9, 12, respectively. The surface characteristic of ARFL films was evaluated by Fourier transform spectra (FTIR) and contact angle and X-ray photoelectron spectroscopy (XPS) analysis. The surface micrograph of fiberglass pulled from H-sample was observed by scanning electron microscope (SEM). The best hydrophobicity was obtained on the nonylphenol-resorcinol- formalin-latex (NRFL) film. A better adhesion was gained for NRFL coated fiberglass comparing to RFL one. The effect of temperature and humidity on the tensile property of coated fiberglass was also discussed. The shelf life of NRFL-coated fiberglass was prolonged to six weeks under hot and humidity weather. The discussed coating may be popularized to other fiber surface to lower the effect of moisture.