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响应面法优化制药废液酯-醇分离工艺
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作者 王犇 张昆 +2 位作者 闫凤凯 申文慧 刘艳杰 《现代化工》 CAS CSCD 北大核心 2019年第9期217-221,共5页
根据制药废液酯-醇混合液的特征建立分离流程,利用响应面法对分离流程中T0101工艺参数进行全局优化。以理论板数、进料位置、溶剂进料位置、回流比、溶剂比为自变量,以回收酯的质量分数为响应值,采用Box-Benhnken中心组合设计建立二阶... 根据制药废液酯-醇混合液的特征建立分离流程,利用响应面法对分离流程中T0101工艺参数进行全局优化。以理论板数、进料位置、溶剂进料位置、回流比、溶剂比为自变量,以回收酯的质量分数为响应值,采用Box-Benhnken中心组合设计建立二阶回归模型并进行响应面优化分析。结果表明,最优工艺参数下响应值为99. 55%,与模型预测值偏差为0. 29%,表明回归模型是可靠、有效的,显著性检验结果表明,影响响应值的主次顺序为溶剂比>溶剂进料位置>原料进料位置>回流比>理论板数。 展开更多
关键词 制药废液 酯-醇混合物 响应面法 优化
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In-situ Enhanced Toughening of Poly(ethylene terephthalate)/elastomer Blends via Gamma-Ray Radiation at Presence of Trimethylolpropane Triacrylate
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作者 Li-zhao Xie Le-chen Chen +3 位作者 Mo-zhen Wang Qi-chao Wu Xiao Zhou Xue-wu Ge 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第6期703-709,I0001,I0002,共9页
Gamma-ray radiation has always been a convenient and effective way to modify the inter- facial properties in polymer blends. In this work, a small amount of trimethylolpropane triacrylate (TMPTA) was incorporated in... Gamma-ray radiation has always been a convenient and effective way to modify the inter- facial properties in polymer blends. In this work, a small amount of trimethylolpropane triacrylate (TMPTA) was incorporated into poly(ethylene terephthalate) (PET)/random terpolymer elastomer (ST2000) blends by melt-blending. The existence of TMPTA would induce the crosslinking of PET and ST2000 molecular chains at high temperatures of blend- ing, resulting in the improvement in the impact strength but the loss in the tensile strength. When the PET/ST2000 blends were irradiated by gamma-ray radiation, the integrated me- chanical properties could be enhanced significantly at a high absorbed dose. The irradiated sample at a dose of 100 kGy even couldn't be broken under the impact test load, and at the same time, has nearly no loss of tensile strength. Based on the analysis of the impact- fractured surface morphologies of the blends, it can be concluded that gamma-ray radiation at high absorbed dose can further in situ enhance the interfacial adhesion by promoting the crosslinking reactions of TMPTA and polymer chains. As a result, the toughness and strength of PET/ST2000 blend could be dramatically improved. This work provides a facial and practical way to the fabrication of polymer blends with high toughness and strength. 展开更多
关键词 Toughened PET blend Interracial interaction Gamma-ray radiation Radia- tion crosslink Trimethylolpropane triacrylate
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Excess Molar Volumes and Viscosities of Binary Mixture of Diethyl Carbonate+Ethanol at Different Temperatures
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作者 马沛生 李楠楠 《Transactions of Tianjin University》 EI CAS 2005年第2期101-105,共5页
The purpose of this work was to report excess molar volumes and dynamic viscosities of the binary mixture of diethyl carbonate (DEC)+ethanol. Densities and viscosities of the binary mixture of DEC+ethanol at tempera... The purpose of this work was to report excess molar volumes and dynamic viscosities of the binary mixture of diethyl carbonate (DEC)+ethanol. Densities and viscosities of the binary mixture of DEC+ethanol at temperatures 293.15 K—343.15 K and atmospheric pressure were determined over the entire composition range. Densities of the binary mixture of DEC+ethanol were measured by using a vibrating U-shaped sample tube densimeter. Viscosities were determined by using Ubbelohde suspended-level viscometer. Densities are accurate to 1.0×10-5 g·cm-3, and viscosities are reproducible within ±0.003 mPa·s. From these data, excess molar volumes and deviations in viscosity were calculated. Positive excess molar volumes and negative deviations in viscosity for DEC+ethanol system are due to the strong specific interactions.All excess molar vo-(lumes) and deviations in viscosity fit to the Redlich-Kister polynomial equation.The fitting parameters were presented,and the average deviations and standard deviations were also calculated.The errors of correlation are very small.It proves that it is valuable for estimating densities and viscosities of the binary mixture by the correlated equation. 展开更多
关键词 DENSITY VISCOSITY excess molar volume diethyl carbonate ETHANOL
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