In this article, high impact polystyrene/organo Fe-montmorillonite (HIPS/Fe-OMT) nanocomposites were prepared by melting intercalation. The thermal stability of HIPS/Fe-OMT nanocomposites increased significantly compared to that of HIPS examined in thermal degradation conditions. Kinetic evaluations were performed by Kissinger, Flynn-Wall-Ozawa, Friedman methods and multivariate nonlinear regression. Apparent kinetic parameters for the overall degradation were determined. The results showed that the activation energy of HIPS/Fe-OMT nanocomposites was higher than that of HIPS. A very good agreement between experimental and simulated curves was observed in dynamic conditions. Their decomposition reaction model was a single-step process of an nth-order reaction.

A fluorinated acrylate copolymer emulsion with core-shell structure was synthesized by semi-continuous emulsion polymerization using methyl methacrylate (MMA ), butyl acrylate (BA) as the raw material, hexafluorobutyl methacrylate as fluorinated acrylate monomer, ammonium persulfate (APS) as initiator, sodium dodecyl sulfate (SDS) and polyoxyethylene octyl phenyl ether (OP-10) as emulsifier and taking water as dispersion medium. The as-prepared latexes are characterized by Fourier transforms infrared (FT-IR) spectroscopy. The hydro-oleophobic of copolymer is determined by contact angle meter. The typical core-shell structure is proved by differential scanning calorimetry (DSC). The results show that the copolymer emulsion has good hydro-oleophobic when the content of hexafluorobutyl methacrylate is 15%, used the delay loading method, the water contact angle of the coating surface is 104 °, the hexadecane contact angle is 75 °. Key words: fluorinated acrylate; copolymer; emulsion; hydro-oleophobic; contact angle

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Based on standard pallet sizes, paper puts forward the calculation method of corrugated box which is fit for the the standard pallet sizes. This method can improve the utilization rate of pallet area, reduce logistics costs, promote the widespread using of standard pallet, and have realistic meanings to establish pallet exchange system.

To support automated service composition, adaptation and verification, there should be a formal model for web service behavior description. For the sake of accurately representing web service behavior, inspired by workflow nets and consume-produce-read nets, we propose a novel formal model for web service behavior description, which can not only describe the control flow, but also the data flow as well as the communication flow of the web service accurately. The model regards tokens, data and messages as control resources, data resources and communication resources and adopts completely different store-and-fetch strategies for each kind of resources respectively.