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Microcomputer Simulation of Elution Behaviour for dicarboxylic acids in Ion－Exclusion Chromatography

Chemical Research in Chinese Universities 1994年第2期10卷 79-84页

作者： Zhao Guo-liang ZHAO Yu-ming and Liu Li-na (Deaprtment of Chemistry Dalian University of Technology, Dalian, 116011 )

he present paper covers a model involving Donnan memhrane equilibrium andadsorption eluilibrium to describe the retention process for diprotic organic acids inion-exclusion chromatography. On this basis the microcomputer simulation of elu-tion behaviour for dicarboxylic acids was investigated. Influences of eluent acidityand sample concentration on the retention value were studied. The theoreticallypredicted results are in reasonable agreement with the experimental data.

关键词： Ion-exclusion chromatography Elution behaviour Microcomputer simulation dicarboxylic acids

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Preparation of Polyester Polyol from Epoxidized Palm Olein

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Chinese Journal of Chemistry 2011年第4期29卷 840-846页

作者： Lee, Choy Sin Lee, Song Cang Pharmaceutical Chemistry Department International Medical University No 126 Jalan 19/155B Bukit Jalil 57000 KL Malaysia Biomedical Engineering Department Faculty of Engineering University of Malaya 50603 KL Malaysia

In this work, polyester polyols with high weight average molecular weight （Mw）（Mw= 10000-15000） were prepared from epoxidized palm olein （EPOo） and a series of dicarboxylic acids （C6-C12） at elevated temperature under non-catalyzed condition. The optimal reaction conditions were determined as 180 ℃ for 4 h. Longer carbon chain length of dicarboxylic acids was more reactive when reacted with EPOo. The physical appearance of the product was observed as liquid at room temperature. This palm oil-based polyester polyol is proposed as starting material for flexible polyurethane. For reaction monitoring purposes, FTIR was used while 1H NMR analysis was carried out to characterize the important functional groups of the products. The effects of reaction time and temperature on the Mw of the reaction mixture were also studied by GPC.

关键词： dicarboxylic acids epoxidized palm olein polyester poyol

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The construction of two supramolecular double chain structures

The construction of two supramolecular double chain structur...

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中国化学会全国第十三届大环化学暨第五届超分子化学学术讨论会

作者： SU Xiao-yu WANG Wen-hai LAN Jing-bo MAO Zhi-hua YOU Jin-song Xffi Ru-gang (Department of Chemistry Sichuan University Chengdu 610064)

Two Supramolecular double chains were demonstrated by co-crystals (1:1) consisting of multifunctional diimidaozles compounds with dicarboxylic acids.

关键词： supramolecular double chain multifunctional diimidazole dicarboxylic acids

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