对硝基甲苯分子印迹聚合物微球的制备及性能

以β-环糊精(β-CD)为单体,对硝基甲苯为模型分子,环氧氯丙烷(ECH)为交联剂,用反相乳液法合成了聚合物微球,经索氏提取器洗脱掉对硝基甲苯后制得分子印迹β-环糊精聚合物微球(MI-β-CDPMs)。利用静态吸附方法对MI-β-CDPMs的吸附性能和Scatchard曲线分析进行研究,结果表明:球状MI-β-CDPMs对水溶液中的对硝基甲苯分子有高负载量和高效识别性;高亲和位点的解离常数为Kd1=12.4069mmol/L,最大表观结合量Qmax1=3.5794mmol/g,低亲和位点的解离常数为Kd2=55.096mmol/L,最大表观结合量Qmax2=10.8893mmol/g。     

由吡嗪-2,3-二甲酸构筑的镉的配位聚合物的水热合成及晶体结构

采用水热法合成了一维配位聚合物[Cd（pzdc）（H2O）3]n（H2pzdc=吡嗪-2,3-二甲酸）.并对其进行了元素分析、红外光谱表征和X射线单晶衍射测定.该配合物属于正交晶系,空间群P 2（1）2（1）2（1）,晶胞参数a=5.7341（4）,b=10.8279（7）,c=15.3484（10）,V=952.96（11）3,C6H8CdN2O7,Mr=332.54,Dc=2.318g/cm3,μ（MoKα）=2.317mm-1,F（000）=648,Z=4,R1=0.0162,wR2=0.0449.     

高分子聚合物有机颜料的合成及应用性能研究

以水溶性高分子材料和活性染料在碱性催化剂作用下,通过接枝共聚反应合成高分子颜料,该颜料应用性能测试结果良好.     

聚合物驱转后续水驱时机和方法

以往注聚区块转后续水驱技术政策并没有规范,也没有深入的研究,转后续水驱的时机和方法各不相同;部分区块转后续过早,导致停注聚后含水上升过快,转后续水驱过晚聚合物成本高、经济效益差。该文对以往转后续水驱区块停注聚效果进行对比分析,得出转后续水驱的最佳时机,又根据以往转后续水驱积累的经验,总结出了停注聚的方法。     

Strengthening reinforced concrete beams using prestressed glass fiber-reinforced polymer-Part Ⅱ: Analytical study

Strengthening reinforced concrete (R. C.) beams using prestressed glass fiber-reinforced polymer (PGFRP) was studied experimentally as described in Part Ⅰ of this paper (Huang et al., 2005). In that paper, R. C. beams, R. C. beams with GFRP(glass fiber-reinforced polymer) sheets, and R. C. beams with PGFRP sheets were tested in both under-strengthened and over-strengthened cases. The test results showed that the load-carrying capacities (ultimate loads) of the beams with GFRP sheets were greater than those of the beams without polymer sheets. The load-carrying capacities of beams with PGFRP sheets were greater than those of beams with GFRP sheets. The objective of this work is to develop an analytical method to compute all of these load-carrying capacities. This analytical method is independent of the experiments and based only on the traditional R. C.and P. C. (prestressed concrete) theory. The analytical results accorded with the test results. It is suggested that this analytical method be used for analyzing and designing R. C. beams strengthened using GFRP or PGFRP sheets.     

高考化学选科对高分子材料与工程专业课成绩相关性分析与对策

以某高校高分子材料与工程专业在校8个班级的371学生为研究对象,开展入学是否选考化学与专业课成绩的Person相关性分析。结果发现所有成绩为正相关,尤其是入学开设的第一门专业课无机化学相关性指数r最高,并且随着学习的开展所学课程的相关系数基本呈现逐步下降的趋势。为了提高高分子材料与工程专业人才培养质量,应在社会认知、高考招生、教学安排和增加本专业学生的忠诚度等方面积极开展工作。     

高分子材料与可持续发展

高分子材料在带给人类巨大物资财富的同时 ,也带来严峻的环境问题 ,即“白色污染”。高分子材料要继续发展必须从根本上解决“白色污染”问题 ,走可持续发展的道路。解决白色污染的方法有 :回收塑料变废为宝、发展环境友好高分子。生物高分子材料由于具有生物可降解性、生物可相容性 ,它可以从根本上解决白色污染问题。2 1世纪是生物时代 ,生物高分子将给高分子科学带来光明的明天     

接枝型高分子表面活性剂的制备

介绍了接枝型高分子表面活性剂的三种制备方法，即大分子单体法、偶合法、活性中心法。     

港西油田C区污水聚合物驱扩大试验数值模拟研究

随着油田开发年限的增长,目前国内大部分油田已处于中高含水阶段,为提高油藏采出程度,在清水聚合物驱油的基础上,对港西C区开展污水聚合物驱扩大试验。通过数值模拟技术,完成污水聚合物驱油方案优化,确定了合理的注聚浓度、注入方式及注入段塞等,优化最佳污水聚合物驱油方案,最终提出港西油田C区污水聚合物驱扩大试验可行性方案。     

In vivo application of poly-3-hydroxyoctanoate as peripheral nerve graft

Objective

This study aims to investigate the degree of biocompatibility and neuroregeneration of a polymer tube, poly-3-hydroxyoctanoate (PHO) in nerve gap repair.

Methods

Forty Wistar Albino male rats were randomized into two groups: autologous nerve gap repair group and PHO tube repair group. In each group, a 10-mm right sciatic nerve defect was created and reconstructed accordingly. Neuroregeneration was studied by sciatic function index (SFI), electromyography, and immunohistochemical studies on Days 7, 21, 45 and 60 of implantation. Biocompatibility was analyzed by the capsule formation around the conduit. Biodegradation was analyzed by the molecular weight loss in vivo.

Results

Electrophysiological and histomorphometric assessments demonstrated neuroregeneration in both groups over time. In the experimental group, a straight alignment of the Schwann cells parallel to the axons was detected. However, autologous nerve graft seems to have a superior neuroregeneration compared to PHO grafts. Minor biodegradation was observed in PHO conduit at the end of 60 d.

Conclusions

Although neuroregeneration is detected in PHO grafts with minor degradation in 60 d, autologous nerve graft is found to be superior in axonal regeneration compared to PHO nerve tube grafts. PHO conduits were found to create minor inflammatory reaction in vivo, resulting in good soft tissue response.