怒江漆油中高级脂肪酸成分

对云南怒江漆油 (漆树籽油 )进行皂化得到了漆油的总脂肪酸 ,将总脂肪酸甲酯化得到总脂肪酸甲酯 ,用GC MS联用仪测定了所含高级脂肪酸的成分 ,结果表明云南怒江漆树油中高级脂肪酸分别为棕榈酸、油酸、硬脂酸、花生酸、二十烷二酸。其中 ,棕榈酸的质量分数高达 76.9%。     

溶剂萃取法回收与处理含DMAc废水的研究

本文研究了用低沸点萃取剂处理和回收含二甲基乙酰胺（DMAc)废水的可行性及工艺条件，经研究表明，在常温20－35℃时，用氯仿萃取二甲基乙酰胺，当溶剂与水相体积比为2：1时，经六级逆流萃取，可将废水中20％（w/w)的二甲基乙酰胺含量降至300mg/L以下。废水的pH值对萃取效率有明显的影响，当废水的pH值较大，即偏碱性对萃取有利。     

Study on esterification of acrylic phenolic resin by maleic anhydride and photocrosslinking properties of the alkali‐soluble product

An alkali‐soluble, photocrosslinkable polymer was synthesized by esterification of OH groups of acrylic phenolic resin with maleic anhydride. The OH groups were formed by the ring‐opening reaction of epoxy groups of epoxy phenolic resin with acrylic acid. The esterification conditions were studied. The results showed that it is better to use tetramethyl ammonium bromide as catalyst than N,N‐dimethylbenzylamine. The conversion of maleic anhydride in acetone can reach about 80% at 56°C for 4 h. The purified product was characterized by IR, DSC, and TGA. The product containing acrylate and maleic acid monoester groups, above a certain content, can be dissolved in 1% Na₂CO₃ solution. The photocrosslinkable properties of the product were investigated through selection of photoinitiator, accelarator, crosslinkable diluent monomer, etc. The acrylate and maleic acid monoester group‐containing phenolic resin exhibited very good photocrosslinking behavior, since it contains double bonds from both acrylate groups and maleic acid monoester groups. The activity of photoinitiator decreases in the order: isopropylthioanthraquinone > benzoin ethyl ether (BE) > anthraquinone (AQ) > benzophenone > Michel ketone (MK) > 2,2‐diethoxyacetophenone. The combination of some photoinitiators showed synergistic effects. The order of increasing activity for the accelerator is as follows: MK > ethyl p‐(dimethylamino)benzoate > N,N‐dimethylaniline > triethanolamine. The optimum diluent monomer is trimethylolpropane trimethacrylate. The gel content of the mixture of the resin and trimethylolpropane trimethacrylate could reach 85% using the combined photoinitiators of BE and AQ under UV exposure for 120 s. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1607–1614, 2005     

基于ERP的电力物资平衡利库系统

为贯彻电力物资精益化管理要求,加快构建储备合理、周转高效的物资仓储管理体系,实现物资需求计划与现有库存物资的有效匹配,不断提高仓储管理水平,提升库存资源利用效率,提出基于ERP实现电力物资平衡利库系统。通过介绍平衡利库的业务理念、应用策略,以及基于ERP对平衡利库系统的最终实现,为提升物资精益化管理水平打下坚实的基础。     

三氧化二钕催化制备尼泊金乙酯

研究了以三氧化二钕为固体催化剂，由对羟基苯甲酸和乙醇合成尼泊金乙酯。讨论了影响酯化反应的因素，与大孔阳离子交换树脂和Ｆｅ２（ＳＯ４）３·ＸＨ２Ｏ相比，三氧化二钕用量少，是对酸的６％，反应时间短，只需４ｈ，反应温度低，不超过９０℃，可循环使用，产率较高，对环境和产品无污染等。     

Effects of the reinforcement and toughening of acrylate resin/CaCO3 nanoparticles on rigid poly(vinyl chloride)

Novel composite particles based on nanoscale calcium carbonate (nano‐CaCO₃) as the core and polyacrylates as the shell were first synthesized by in situ encapsulating emulsion polymerization in the presence of the fresh slush pulp of calcium carbonate (CaCO₃) nanoparticles. Subsequently, these modified nanoparticles were compounded with rigid poly(vinyl chloride) (RPVC) to prepare RPVC/CaCO₃ nanocomposites. At the same time, the effects of the reinforcement and toughening of these modified nanoparticles on RPVC were investigated, and the synergistic effect of modified nanoparticles with chlorinated polyethylene (CPE) was also studied. The results showed that in the presence of nano‐CaCO₃ particles, the in situ emulsion polymerization of acrylates was carried out smoothly, and polyacrylates successfully encapsulated on the surface of nano‐CaCO₃ to prepare the modified nanoparticles, breaking down nano‐CaCO₃ particle agglomerates, improving their dispersion in the matrix, and also increasing the particle–matrix interfacial adhesion. Thus, the effects of the reinforcement and toughening of these modified nanoparticles on RPVC were very significant, and the cooperative effect of the nanoparticles with CPE occurred in the united modification system. Scanning electron microscopy analyses indicated that large‐fiber drawing and network morphologies coexisted in the system of joint modification of nanoparticles with CPE. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3940–3949, 2007     

Novel method for preparation of quaternary ammonium ionomer from epoxidized styrene–butadiene–styrene triblock copolymer and its use as compatibilizer for blending of styrene–butadiene–styrene and chlorosulfonated polyethylene

A novel method for the preparation of a quaternary ammonium ionomer of styrene–butadiene–styrene triblock copolymer (SBS) was developed by a ring‐opening reaction of epoxidized SBS with triethylamine hydrochloride in the presence of a phase transfer catalyst. The optimum conditions were studied. The ionomer was characterized by quantitative analysis, IR spectroscopy, and ¹H‐NMR spectroscopy. Its water absorbency, oil absorbency, dilute solution viscosity, and use as a compatibilizer for the blending of SBS and chlorosulfonated polyethylene (CSPE) were investigated. The results showed that, under optimum conditions, the epoxy groups can be completely converted to the quaternary ammonium groups. The IR spectrum did not exhibit the absorption peak for quaternary ammonium groups, whereas the ¹H‐NMR spectrum and titration method demonstrated it. With increasing ionic group content, the water absorbency of the ionomer increased whereas its oil absorbency decreased. These indicated the amphiphilic character of the SBS ionomer. The dilute solution viscosity of the ionomer in toluene/methanol (9/1) solvent increased with increasing quaternary ammonium group content. The ionomer was used as a compatibilizer for the blends of SBS and CSPE. The addition of a small amount of the ionomer to the blend enhanced the mechanical properties of the blends: 2 wt % ionomer based on the blend increased the tensile strength and ultimate elongation of the blend nearly 2 times. The blends of equal parts SBS and CSPE behaved as oil‐resistant thermoplastic elastomers. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1975–1980, 2006     

联合制碱母液精制研究(下)

Brief review of the evolutive course of preparation and refining of mother liquor in Hou's soda-manufacturing Process and the historical root of inferior quality of the product from Hou's Process to that of Ammonium Soda Process. By determination in production, the technical causes of carrying of "escaping crystal" in flooding liquid from the salting out crystallizer and necessity of replacing the existing mother liquor Ⅱ vat by mother liquor Ⅱ settling tank. Theoretical and engineering basis of refining of mother liquor in Hou's Process is emphasized. Main results from field test of purification and filtration at low temperature of mother liquor Ⅱ prepared from three kinds of salt as raw material are introduced. Principle opinions of application on production are put forward.     

基于专家主观信息的学术期刊评价方法研究

该文侧重于学术期刊定性属性的评价方法研究。学术期刊定性属性特征通常具有模糊性,因而往往需要由专家给出主观判断。通过建立基准语言等级评价集合,提出了将专家给出的关于各定性属性的主观评价信息规范化为基准语言等级评价集合并集成的综合评价方法。最后通过计算可以得到学术期刊的综合评价值,进而使得学术期刊评价尽可能的公平化。