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1. Synergistic effect of polyhedral oligomeric silsesquioxane on the flame retardancy and thermal degradation of intumescent flame retardant polylactide | |||
XUAN Shanyong,HU Yuan,SONG Lei,WANG Xin,YANG Hongyu,LU Hongdian | |||
Security Science and Technology 11 December 2011 | |||
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Abstract:In this study, intumescent flame retardant polylactide/trisilanolisobutyl polyhedral oligomeric silsesquioxane (PLA/TPOSS) composites were prepared via melt blending method. The morphology of the PLA nanocomposites was assessed by transmission electron microscopy (TEM). The flame retardancy of the PLA/TPOSS composites was evaluated by limiting oxygen index (LOI) test and UL-94 test. It was observed that the addition of TPOSS had evident flame retardant effect in comparison to the results obtained from neat PLA. The PLA nanocomposite showed a 69 % reduction of heat release capacity (HRC) when tested in the microscale combustion calorimeter (MCC). Thermalgravimetric analysis (TGA) showed the incorporation of intumescent flame retardant and TPOSS had effectively delayed the thermo-oxidation process of the PLA. The thermal degradation mechanisms of the PLA/TPOSS composites were investigated by thermogravimetric analysis/infrared spectrometry (TG-IR) and direct pyrolysis/mass (DP-MS) analysis. | |||
TO cite this article:XUAN Shanyong,HU Yuan,SONG Lei, et al. Synergistic effect of polyhedral oligomeric silsesquioxane on the flame retardancy and thermal degradation of intumescent flame retardant polylactide[OL].[11 December 2011] http://en.paper.edu.cn/en_releasepaper/content/4455127 |
2. Synergistic effect of POSS on mechanical properties and flammability of intumescent flame retardant polylactide composites | |||
WANG Xin,XUAN Shanyong,SONG Lei,YANG Hongyu,LU Hongdian,HU Yuan | |||
Security Science and Technology 30 November 2011 | |||
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Abstract:The intumescent flame retardant polylactide/polyhedral oligomeric silsesquioxane (IFR-PLA/POSS) composites were prepared via a melt blending method. The morphology of the PLA nanocomposites was assessed by transmission electron microscopy (TEM). Dynamic mechanical analysis (DMA) and tensile tests showed that the incorporation of POSS enhanced the mechanical properties of the PLA matrix. The LOI values increased from 20.0% for neat PLA to 40.0% for PLA based on 22.5 wt% intumescent flame retardant and 7.5 wt% POSS, and the latter could pass UL-94 V0 rating. Thermal gravimetric analysis (TGA) showed that the thermal stability of the residual char at the later stages of the thermal degradation was significantly improved. | |||
TO cite this article:WANG Xin,XUAN Shanyong,SONG Lei, et al. Synergistic effect of POSS on mechanical properties and flammability of intumescent flame retardant polylactide composites[OL].[30 November 2011] http://en.paper.edu.cn/en_releasepaper/content/4452986 |
3. A KIND OF IMPLEMENT ABOUT MOBILE SIGNATURE SERVICE BASED ON MOBILE TELEPHONE TERMINAL | |||
Wang Jian,Xu Guoai,Zhang Miao | |||
Security Science and Technology 24 December 2009 | |||
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Abstract:Mobile signature is a relatively new security authentication mechanism that a kind of special electric signature. It brings a great convenience for people and helps some enterprise save cost, such as bank. By introducing the concept of mobile signature I will analyze the limitation and deficiency of common electronic signature. The implement of mobile signature will also be introduced in this paper. Meanwhile some information, which mainly includes mobile signature service, mobile signature provider and the cryptographic techniques, involved in the implement will be described in detail. | |||
TO cite this article:Wang Jian,Xu Guoai,Zhang Miao. A KIND OF IMPLEMENT ABOUT MOBILE SIGNATURE SERVICE BASED ON MOBILE TELEPHONE TERMINAL[OL].[24 December 2009] http://en.paper.edu.cn/en_releasepaper/content/38025 |
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