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Interface and properties of epoxy resin modified by elastomeric nano-particles

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Science China Chemistry 2005年第2期48卷 148-155页

作者： HUANG Fan1, LIU Yiqun1, ZHANG Xiaohong1, GAO Jianming1, SONG Zhihai1, TANG Banghui1, WEI Genshuan2 & QIAO Jinliang1 1. SINOPEC Beijing Research Institute of Chemical Industry, Beijing 100013, China 2. Institute of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100080, China Correspondence should be addressed to Qiao Jinliang (email: jqiao@***.) SINOPEC Beijing Research Institute of Chemical Industry Beijing China Institute of Applied Chemistry College of Chemistry and Molecular Engineering Peking University Beijing China

Study on a new composite of epoxy resin/elastomeric nano-particles (ENP) is re- ported in this paper, which shows that, in comparison with pure epoxy resin and epoxy toughened with CTBN, the composites of epoxy resin/carboxylic nitrile-butadiene ENP and epoxy resin/styrene butadiene vinyl-pyridine ENP possess both higher toughness and heat resistance. Both ENPs used in the study have an average size of less than 100 nm. Study on the epoxy network’s morphology and interface properties suggests that due to the chemical reaction be- tween ENP and epoxy resin and more hydrogen bonds between nitrile groups of the rubber and hydroxyl groups of the epoxy resin, stronger interaction at the larger interface may lead to the observed excellent properties of the epoxy resin toughened with ENP.

关键词： elastomeric nano-particles, epoxy resin, carboxylic nitrile-butadiene rubber, styrene butadiene vinyl-pyridine rubber, interface.

Adsorption of surfactants onto acrylic ester resins with different pore size distribution

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Science China Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2,3,LI Aimin1,3,CAI Jianguo1,3,MENG Guanhua1,3 & ZHANG Quanxing1,3 1. State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing 210093,China 2. Nanjing College of Chemical Technology,Nanjing 210048,China 3. Jiangsu Engineering & Technology Research Center for Organic Toxicant Control and Resource Reuse,Nanjing 210038,China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Nanjing College of Chemical Technology Nanjing China Jiangsu Engineering & Technology Research Center for Organic Toxicant Control and Resource Reuse Nanjing China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2MG, 50# and 38# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

Preparation of Polysulfone-supported Phosphoramidic Acid Type Chelate Membrane and Its Sorption Properties for Ag^+

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Journal of Donghua University(English Edition) 2002年第2期19卷 49-53页

作者：王兵崔永芳杜启云裴广玲 Coll. of Mat. Sci. and Chem. Eng. Tianjin Polytech. Univ. Tianjin 300160 China

A blending chelate filter membrane with high chelate capacity for Ag + has been prepared by blending of phosphoramidic acid resin and polysulfone. The major parameters influencing structure of the chelate filter membranes such as the blending ratio, phosphoramidic acid resin grain size and temperature of casting solution have been studied. The relationship among the chelate amount of Ag +, pH value, Ag + concentration and phosphoramidic acid resin grain diameter were examined. The chelate filter membrane had a capacity of 1 438 μg/cm 2 for Ag + under appropriate conditions. Sorption isotherm of Ag + could be expressed with the Freundlich sorption model. The dynamic chelate experiments proved that the sorption and desorption of membranes could be realized simultaneously for Ag +.

关键词： phosphoramidic acid resin, polysulfone , chelate filter membrane, sorption, desorption, Ag+

Rapid Tooling Technique Based on Stereolithograph Prototype

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Journal of Donghua University(English Edition) 2001年第2期18卷 105-107页

作者：丁浩狄平顾伟生朱世根 Dept. of Mech. Eng. Dong Hua Univ. Shanghai 200051 China

Rapid tooling technique based on the sterelithograph prototype is investigated. The epoxy tooling technological process was elucidated. It is analyzed in detail that the epoxy resin formula is easy to cast, curing process, and release agents. The transitional plaster model is also proposed. The mold to encrust *** with epoxy and mold to inject plastic soapboxes was made with the technique The tooling needs very little time and cost, for the process is only to achieve the nice replica of the prototype. It is benefit for the trial and small batch of production.

关键词： stereolithography prototype, epoxy resin, tooling,transitional mold