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聚氨酯材料可燃性与火灾危险性分析 被引量:2
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作者 陈晨 张艳艳 +1 位作者 李增杰 孙辉 《广州化工》 CAS 2019年第8期68-70,共3页
为掌握建筑行业的聚氨酯(PU)保温材料的燃烧特性与火灾模型,运用差式扫描量热仪(DSC)、热重分析仪(TG)以及锥形量热仪对其进行了测试。通过Kissinger法和Ozawa法对实验所得到的DSC和TG数据进行热力学分析,计算得到PU活化能和指前因子等... 为掌握建筑行业的聚氨酯(PU)保温材料的燃烧特性与火灾模型,运用差式扫描量热仪(DSC)、热重分析仪(TG)以及锥形量热仪对其进行了测试。通过Kissinger法和Ozawa法对实验所得到的DSC和TG数据进行热力学分析,计算得到PU活化能和指前因子等动力学参数以及PU在N_2气氛中的反应活性。利用锥形量热仪得到的数据,得出PU在火灾中的燃烧特性参数,为建立火灾模型提供参考。 展开更多
关键词 燃烧特性参数 热力学参数 聚氨酯
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低温环境下湿空气状态参数的数值计算
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作者 周巍 王达子 《黑龙江商学院学报》 1994年第4期30-34,共5页
在完善湿空气状态参数计算方程基础上,编制了计算机辅助计算的若干子程序,其运行结果正确可靠。
关键词 湿空气 状态参数 低温环境 相对湿度
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Kinetics process of Tb(Ⅲ)/Tb couple at liquid Zn electrode and thermodynamic properties of Tb-Zn alloys formation 被引量:2
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作者 LiXia Luo YaLan Liu +5 位作者 Ning Liu Kui Liu JinWen Pang LiYong Yuan ZhiFang Chai WeiQun Shi 《Science China Chemistry》 SCIE EI CAS CSCD 2017年第6期813-821,共9页
Electrochemical properties of rare-earth elements in the LiCl-KCl eutectic are important for the pyrometallurgical recycling process of spent nuclear fuels. In this work, the electrochemical properties of Tb(Ⅲ)/Tb(0)... Electrochemical properties of rare-earth elements in the LiCl-KCl eutectic are important for the pyrometallurgical recycling process of spent nuclear fuels. In this work, the electrochemical properties of Tb(Ⅲ)/Tb(0) couple were studied by the cyclic voltammetry(CV) at a liquid Zn pool electrode. The results showed that this electrochemical reaction is quasi-reversible with mixed reversible diffusion control and the charge transfer control. The diffusion coefficient of Tb(Ⅲ) was determined to be in the order of ~10.5 cm2 s.1. Moreover, kinetic parameters, such as the standard rate constants(ks) and charge transfer coefficient(α) for the electroreduction of Tb(Ⅲ) to Tb(0) at the liquid Zn electrode, were calculated by the Nicholson method at 873 K. Additionally, it was found that Tb-Zn intermetallic compounds were easily to be formed in the measurements. Hence, the reduction process of Tb(Ⅲ)/Tb(0) couple on the Zn-coated Mo electrode was also studied to obtain more information of the Tb-Zn intermetallic compounds. Electrochemical signals stemming from various intermetallic compounds associated with TbZn12, Tb2Zn17, Tb13Zn58, Tb3Zn11, TbZn3, TbZn2 and TbZn, were observed. The thermodynamic data were thereafter estimated by applying the emf method at 823–923 K. The standard formation Gibbs energies and the standard equilibrium constant of each Tb-Zn intermetallic compounds were also calculated. Finally, enthalpies and entropies of formation and the apparent standard potentials of various Tb-Zn intermetallic compounds were also obtained. 展开更多
关键词 TB liquid Zn electrode kinetic parameters thermodynamic properties molten salt
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Synthesis of newly cationic surfactant based on dimethylaminopropyl amine and their silver nanoparticles:Characterization;surface activity and biological activity
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作者 Samy M.Shaban Ismail Aiad +2 位作者 Mohamed M.El-Sukkary E.A.Soliman Moshira Y.El-Awady 《Chinese Chemical Letters》 SCIE CAS CSCD 2017年第2期264-273,共10页
The chemical structure of newly synthesized cationic surfactants based on Schiff base was confirmed using Fourier transform infrared spectroscopy,proton nuclear magnetic resonance spectroscopy,and mass spectroscopy.Th... The chemical structure of newly synthesized cationic surfactants based on Schiff base was confirmed using Fourier transform infrared spectroscopy,proton nuclear magnetic resonance spectroscopy,and mass spectroscopy.The synthesized surfactants were used in the synthesis of silver nanoparticles by a simple one-step method.The silver nanoparticle(AgNPs) formation was confirmed using transmission electron microscopy(TEM),electron diffraction(SAED),dynamic light scattering(DLS),and energy dispersive X-ray spectroscopy(EDX).The structure of the surfactant played an important role in the synthesis process.Increasing the hydrophobic chain length,the stability,and the amount of surfactant increased the quantity of AgNPs formed.The surface activity of the synthesized cationic surfactants was determined using surface tension measurements at three different temperatures.The synthesized surfactants showed a high tendency toward adsorption and micellization.Increasing the hydrophobic chain length of the synthesized surfactant increased its adsorption.Screening the synthesized cationic surfactants and their nano-form against bacteria and fungi showed that they are highly effective.The silver nanoparticles enhanced the biological activity of the synthesized cationic surfactants. 展开更多
关键词 Cationic surfactant Silver nanoparticles Dynamic light scattering Biological activity Surface parameters thermodynamic parameters
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一种智能化热能测量仪
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作者 朱荣辉 滕召胜 《计量学报》 CSCD 北大核心 2000年第2期125-129,共5页
本文根据热力学理论,建立了高精度、宽范围水蒸汽热力学状态参数数学模型;分析了相应的测量技术问题;介绍了以8098单片机为数据处理核心的智能化热能测量仪的硬件结构与软件设计。实验结果表明:该仪器是一种多功能综合性智能仪器,其测... 本文根据热力学理论,建立了高精度、宽范围水蒸汽热力学状态参数数学模型;分析了相应的测量技术问题;介绍了以8098单片机为数据处理核心的智能化热能测量仪的硬件结构与软件设计。实验结果表明:该仪器是一种多功能综合性智能仪器,其测量精度优于05%。 展开更多
关键词 热力学状态参数 数学模型 智能检测 热能测量仪
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THERMODYNAMIC CALCULATION WITH MODELS FOR LIQUID COPPER
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作者 Ding,Xueyong Wang,Wenzhong Gou,Den(Department of Ferrous Metallurgy, Northeastern University, Shenyang 110006)Han,Qiyong(Department of Physical Chemistry, University of Science & Technology Beijing,Beijing 100083) 《中国有色金属学会会刊:英文版》 CSCD 1994年第2期25-28,共4页
THERMODYNAMICCALCULATIONWITHMODELSFORLIQUIDCOPPERDing,Xueyong;Wang,Wenzhong;Gou,DenTHERMODYNAMICCALCULATIONW... THERMODYNAMICCALCULATIONWITHMODELSFORLIQUIDCOPPERDing,Xueyong;Wang,Wenzhong;Gou,DenTHERMODYNAMICCALCULATIONWITHMODELSFORLIQUI... 展开更多
关键词 LIQUID Cu INTERACTION parametER thermodynamic CALCULATION
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