MATLAB语言在高分子化学教学实践中的应用

以数据处理、曲线绘制和直线拟合为例,讨论了MATLAB语言在高分子化学教学实践中的应用.结果表明,MATLAB语言简化了数据处理计算过程,提高了准确率,使曲线绘制和直线拟合更加方便快捷.     

漆酚甲醛缩聚物乳液的研制

用漆酚基乳化剂（UE）将漆酚甲醛缩聚物（UFP）乳化为水包油（O／W）型的稳定水基分散体系．研究了乳化温度、UE用量及UE结构对相反转乳化过程的的影响,并用乳液体系电导率变化和黏度变化表征了相反转乳化过程．实验结果表明,以漆酚基乳化剂UEl0B为乳化剂,利用相反转技术可得到稳定的漆酚甲醛缩聚物水性乳液．当UE10B与UFP的质量比r≥10％,乳化温度为40℃时,可将漆酚甲醛缩聚物乳化为稳定的水基化分散体系．所制得漆酚甲醛缩聚物乳液粒子为多孔结构的5～20μm微球,孔的尺寸小于1μm．     

3-吲哚乙酸印迹聚合物分子识别机理的色谱和光谱研究

采用非共价印迹技术,以丙烯酰胺（AA）为功能单体,乙腈为致孔剂,用本体聚合方法制备了3．吲哚乙酸（3-IAA）印迹聚合物P（AA）。以P（AA）为色谱柱填料,用色谱法评价了其分子识别性能,实验结果表明,乙腈为流动相时,P（AA）对3-IAA具有良好的分子识别能力,其印迹因子（IF）为3．33。与各结构类似物比较,3-IAA在P（AA）上表现出了特异亲和能力,3-IAA与其同系物3．吲哚丁酸（3-IBA）在P（AA）色谱柱上可以得到很好的分离,证明了P（AA）中存在与3-IAA互补的印迹空穴。流动相乙腈中加入少量HAc和H20后,P（AA）对3-IAA的IF大大降低,证明氢键作用在P（AA）的分子识别过程中起重要作用。此外,用3种光谱方法——紫外光谱法、荧光光谱法和红外光谱法研究了3-IAA与AA在乙腈溶液中的作用情况。     

Strengthening an in-service reinforcement concrete bridge with prestressed CFRP bar

Carbon fiber reinforced polymer （CFRP） bars were prestressed for the structural strengthening of 8 T-shaped reinforced concrete （RC） beams of a 21-year-old bridge in China. The ultimate bearing capacity of the existing bridge after retrofit was discussed on the basis of concrete structures theory. The flexural strengths of RC beams strengthened with CFRP bars were controlled by the failure of concrete in compression and a prestressing method was applied in the retrofit. The field construction processes of strengthening with CFRP bars including grouting cracks, cutting groove, grouting epoxy and embedding CFRP bars, surface treating, banding with the U-type CFRP sheets, releasing external prestressed steel tendons-were introduced in detail. In order to evaluate the effectiveness of this strengthening method, field tests using vehicles as live load were applied before and after the retrofit. The test results of deflection and concrete strain of the T-shaped beams with and without strengthening show that the capacity of the repaired bridge, including the bending strength and stiffness, is enhanced. The measurements of crack width also indicate that this strengthening method can enhance the durability of bridges. Therefore, the proposed strengthening technology is feasible and effective.     

Strengthening an in-service reinforcement concrete bridge with prestressed CFRP bars

Carbon fiber reinforced polymer(CFRP)bars were prestressed for the structural strengthening of 8 T-shaped rein-forced concrete (RC)beams of a 21-year-old bridge in China.The ultimate bearing capacity of the existing bridge after retrofit was discussed on the basis of concrete structures theory.The flexural strengths of RC beams strengthened with CFRP bars were controlled by the failure of concrete in compression and a prestressing method was applied in the retrofit.The field construction processes of strengthening with CFRP bars-including grouting cracks,cutting groove,grouting epoxy and embedding CFRP bars,surface treating,banding with the U-type CFRP sheets,releasing external prestressed steel tendons-were introduced in detail.In order to evaluate the effectiveness of this strengthening method,field tests using vehicles as live load were applied before and after the retrofit.The test results of deflection and concrete strain of the T-shaped beams with and without strengthening show that the capacity of the repaired bridge,including the bending strength and stiffness,is enhanced.The measurements of crack width also indicate that this strengthening method can enhance the durability of bridges.Therefore,the proposed strengthening technology is feasible and effective.     

含羧基的磁性高分子微球的制备和表征

在共沉淀法合成超细磁粉的基础上,以苯乙烯（St）为单体,过氧化苯甲酰（BPO）或过硫酸钾（KPS）为引发剂与丙烯酸共聚。用分散聚合法得到了含羧基（-COOH）的具有核壳结构的磁性高分子微球。并讨论了影响微球粒径的各种因素。同时采用SEM、IR等对样品进行了表征。     

4，4＇-联吡啶桥联汞配位聚合物[Hg（C10H8N2）I2]n合成和结构

标题化合物是双齿配体4,4＇-联吡啶与碘化汞在甲醇和四氢呋喃混合溶液中反应得到的无色晶体。用X-射线测定了其单晶结构,该晶体属单斜晶系,Cc空间群。结构分析表明,汞离子与两个碘离子和来自4,4＇-联吡啶的两个氮原子配位形成畸变四面体构型,并且通过4,4＇-联吡啶桥联汞离子沿着c轴延伸构筑成一维“之”字型聚合物。     

高分子专业课程设计的教学探究

针对以往高分子专业课程设计教学过程中存在的时间紧迫、学生理解不透、考核不严等问题,进行了教学改革探索,实施了提前准备、模型教学、多媒体讲解、答辩考核等方面的教学改革,有效地提高了课程设计的教学质量。     

促蛋白复性高分子及其作用机制

概述近年来蛋白复性中所使用的高分子添加剂及各自的作用机制,为相关领域的研究者对促蛋白用高分子的选择以及新型材料的研制,提供一定的研究基础和理论依据.     

制备聚合硫酸铁的一种新方法

以硫酸亚铁为原料,采用过氧化氢一步氧化法制备聚合硫酸铁絮凝剂。研究了新工艺的反应原理、方法,产品的物理化学性能以及该产品在废水处理中的应用。