Competitive removal of Pb2+, Cd2+, and Zn2+ by poly(acrylamide‐co‐maleic acid) hydrogels/differential pulse polarographic determination

Poly(acrylamide‐co‐maleic acid) [P(AAm/MA)] hydrogels, with various compositions, were prepared from ternary mixtures of acrylamide (AAm)/maleic acid (MA)/water by using ⁶⁰Co γ‐rays. The effect of composition of these hydrogels, on the competitive removal of Pb²⁺, Cd²⁺, and Zn²⁺ ions from aqueous solution, was investigated. The hydrogel compositions and their adsorption behaviors were determined by use of differential pulse polarography, a very sensitive electroanalytical technique. It was observed that the external stimuli of pH, temperature, and ionic strength have an important role on the adsorption. The increments of MA content in P(AAm/MA) hydrogels caused a significant increase in the adsorption these ions. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2401–2406, 2004     

甲酸甲酯合成与转化的催化技术

本文评述了甲酸甲酯(MF)合成与转化的催化技术,展示了从MF出发发展C_1化学的可能途径,在MF的合成方面详细地分析了从甲醇出发的羰化法、脱氢法和氧化法催化技术,简介了我们的有关研究工作。     

异喹啉生物碱类化合物的合成及其血管紧张素Ⅱ受体拮抗活性

合成了14个未知的异喹啉衍生物，其化学结构经红外光谱、核磁共振氢谱、核磁共振碳谱、质谱及元素分析等证实。经大鼠肝细胞膜血管紧张素Ⅱ受体拮抗活性研究表明，其中两个化合物的盐酸盐具有生物活性。     

Novel thermosetting resins for SMC applications from linseed oil: Synthesis,characterization, and properties

New thermosetting resins for applications of sheet‐molding compounds (SMCs) were successfully synthesized from linseed oil, which is the most molecularly unsaturated of all plant oils. The carbon–carbon double bonds were opened by epoxidation, followed by acrylation, and then maleinization, which provided more crosslink sites and added acid functionality on the triglyceride molecules to develop thickening. Dynamic mechanical analysis showed that the storage modulus of these new polymers was approximately 2.5 GPa at 30°C, and the glass‐transition temperature was above 100°C. During maturation the resins reached a molding viscosity quickly and stayed stable. Mechanical tests showed a flexural strength of 100 MPa and a flexural modulus of 2.8 GPa. Thermogravimetric analysis showed a single degradation ranging from 300°C–480°C, which was a result of the carbonization of the crosslinked network. These bio‐based resins are promising as replacements of some petroleum‐based resins in the SMC industry. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci, 2006     

氨合成催化剂钝化的研究

探索了氨合成催化剂还原后的温度对钝化操作与产品质量的影响,确定了最佳的钝化温度。     

影响海岛法纺PET超细纤维剥离性的因素

采用海岛复合法纺制PET超细纤维,织物终产品的剥离性能的优劣是由纺丝过程中原料、设备、工艺等因素决定的,着重通过表界面原理定性分析指出解决方法和调整方向。     

New perfectly difunctional organolithium initiators for block copolymer synthesis: 2. Difunctional polymers of dienes and of their triblocks copolymers with styrene

New organodilithium initiators were prepared in a hydrocarbon solvent in the absence of any polar additive. Although these initiators are insoluble when they are synthesized, they may be easily purified and reacted with dienes to give perfectly telechelic polydienes having unimodal distributions and low dispersity. A good agreement between experimental and theoretical molecular weights was observed. The polymer microstructures were similar to those of polymers initiated by butyllithium in the same solvent. Triblock thermoplastic elastomers were also prepared, the characteristics of which are given. The mechanical properties of a S.B.S. sample support also the claim of a good initiating ability and difunctionality of these initiators.     

An infra-red study of model compounds of poly(tetramethylene terephthalate)

An infra-red spectroscopic investigation of the poly(tetramethylene terephthalate) model compounds butyl-dibenzoate: C₆H₅COO(CH₂)₄OCOC₆H₅ (i), 1,4-bis-butyl terephthalate: HO(CH₂)₄-OCO₆H₄COO(CH₂)₄-OH (ii), α-butyl-ω-butoxyterephthalaoyl-di-(tetramethylene terephthalate): H(CH₂)₄(OCOC₆H₄COO-(CH₂)₄-)₃-OH (iii), and α-butyl-ω-butoxyterephthalaoyl-tetra-(tetra-methylene terephthalate): HO(CH₂)₄-(OCOC₆H₄COO(CH₂)₄-)₅-OH (iv) is presented. The synthesis of (i) is also described. Spectroscopic evidence indicates that the crystal conformations of the aliphatic segments in (i) and (ii) closely resemble the extended all trans beta form of PTMT. Oligomers (iii) and (iv), however, are found to be more similar to the crumpled alpha crystal phase of PTMT.     

杂多化合物催化剂在精细化工合成中的应用

本文综术了杂多化合物作为酸催化剂，催化烷基化和去烷基化反应、缩聚反应、水合和失水、酯化和醚化反应；以及作为氧化催化剂，在烯烃、芳烃、酚的氧化和环氧化反应中的应用。表面杂多化合物作为催化剂在合成精细化学中有广泛的应用价值。     

4′-乙酰基缩氨硫脲基苯并-15-冠-5的合成

报道了在多聚磷酸 (PPA )中将冠醚酰化的方法 ,合成了 4′-乙酰基苯并 - 15 -冠 - 5 ,以此为原料 ,在酸性条件下与氨基硫脲作用 ,合成了 4′-乙酰基缩氨硫脲基苯并 - 15 -冠 - 5。经由 IR、MS和元素分析对合成的两种新物质的结构进行了表征