水溶性共轭聚合物PPEASO3分子量的粘度法估测

利用稀溶液粘度法对所合成的水溶性共轭聚合物PPEASO3的分子量进行了估测.先通过含0.1M NaNO3的PPEASO3水溶液的粘度测量数据求出其特性粘数[η],再利用Mark-Houwink方程[η]=KMαη和有关文献中的三种参考聚合物的K、α值计算得到聚合物的粘均分子量Mη,最后取其平均值得到PPEASO3的粘均分子量为Mη≈150KD.     

高分子科学实验课程的综合性改进

天津城市建设学院高分子实验课题组在原有高分子实验课程的基础上，从系统化、模块化、综合化的角度出发，对实验内容进行了综合性改进，突出了知识点之间的内在联系，使学生对知识点有了更深入全面的了解，锻炼和提高了学生的综合实践能力和主动探索精神，使高分子科学实验在新的形势下能够适应培养综合型人才的需要。     

Syntheses,structure and photoluminescent properties of lanthanide oxalatosulfocarboxylate coordination polymers

Hydrothermal reactions of oxalic acid(H2ox) and 2-sulfobenzoic acid(H2L) with lanthanide oxide or hydroxide yielded five lanthanide oxalatosulfocarboxylates.They have a general formula [Ln2L2(ox)(H2O)6]n[Ln = La(1),Nd(2),Eu(3),Gd(4),Tb(5)].Their structures were characterized by single crystal X-ray diffraction,powder X-ray diffraction(PXRD),infrared(IR) spectroscopy,elemental analysis(EA),and thermogravimetric analysis(TGA).1-5 are isostructural coordination polymers and feature one-dimensional(1D) chains,which are extended into 3D supramolecular frameworks through inter-chain hydrogen bonds between coordinated H2O donors and oxygen acceptors from carboxylate,sulfonate and oxalate groups.In addition,the solid-state photoluminescence properties of the Nd(2),Eu(3) and Tb(5) derivatives have been measured at room temperature.The Eu and Tb-containing coordination polymers(CPs) exhibit intense red and green luminescence emissions,respectively,with lifetimes in the order of millisecond.     

一种pH敏感高分子的合成及性能测定

从分子设计的角度出发,利用丙烯酸、甲基丙烯酸甲酯、顺丁烯二酸酐三元单体共聚,制备了能固定生物大分子的pH敏感高分子材料,测得其溶解-沉淀的临界pH值为3.8。同时用傅里叶红外光谱、凝胶渗透色谱对合成的共聚物的结构进行了表征。     

改性沥青混凝土配合比设计

鉴于聚合物改性沥青可以明显改善沥青混凝土路面的低温和高温性能,延长道路使用寿命,因此聚合物改性沥青已经成为全球沥青路面的首选。本次高速公路项目的路面上面层组成配合比设计就添加和利用了石灰岩集料和SBS改性沥青(基质沥青为韩国SK重交沥青AH-70)来进行配合比筛选和设计,并得出最佳沥青用量和沥青混凝土密度,总结SBS改性沥青混凝土相比于普通沥青混凝土具有更好性能。     

自组装金属酞菁聚合物的合成及表征

通过逐步聚合的方法合成了一种新的含有长烷基链的金属酞菁的聚合物,这种自组装的聚合物有很好的溶解性能,且很容易成膜,并对其光以及电化学性能进行研究.从紫外可见光谱图中可以看到两个强的吸收带,分别位于600-700 nm,以及300-400 nm.这种物质具有低的禁带宽度(Eg<1.8 eV),很容易吸收太阳光.采用332 nm的光作为激发光源,它的溶液的发射峰出现在402nm.从循环伏安图上可以观察到,两个可逆的氧化还原过程出现在0.64 V,-1.10 V.     

现代汉语聚合词简述

聚合词是现代汉语中一类比较特殊的词汇,它相当活跃却鲜为人所关注.本文拟以前人有限的研究成果为基础,试图对聚合词的概念、分类、语法特征等问题进行更深入的探究,并且试图从声调入手来揭示聚合词内部语素的排序规律.     

力学谱技术在聚合物流体结构转变过程中的研究进展

介绍了近年来利用力学谱技术研究聚合物流体(聚合物熔体和高分子浓溶液)结构转变过程的进展，分析了分子质量和共混物质量浓度对单分散聚合物熔体液/液转变过程的影响及其液/液转变机制，并介绍了嵌段共聚物聚氧乙烯/聚氧丙烯/聚氧乙烯(PEO PPO PEO)浓溶液的相转变过程随温度、聚合物质量浓度和NaCl等因素变化的关系，指出了今后力学谱技术在软凝聚态领域有待于进一步研究的方向.     

LLDPE/TiO2 nanocomposites produced from different crystallite sizes of TiO2 via in situ polymerization

Nano-TiO2 particles with a range of crystallite sizes were synthesized by a conventional sol-gel method,and then used as nanoparticle substrates in the synthesis of LLDPE/TiO2 nanocomposites via in situ polymerization of ethylene/1-hexene with zirconocene/MMAO catalyst.It was found that the size of the nano-TiO2 crystallite nanoparticles can influence the catalytic activity in the polymerization system.The larger nano-TiO2 crystallites provided better catalytic activity in the polymerization system due to more space for monomer attack.In addition,by thermo-gravimetric analysis,it can be seen that the larger nano-TiO2 crystallites also exhibited lower interaction with available MMAO.Consequently,the MMAO reacted more efficiently with the zirconocene catalyst during the activation process,and enhanced polymerization catalysis.All the polymer nanocomposites products did not have well defined melting temperature indicating non-crystalline polymers.This is due to the high amount of hexene incorporation(based on 13C NMR).The difference in crystallite sizes of the nano-TiO2 also affected how 1-hexene became incorporated into the polymer nanocomposites.The smaller crystallite size of nano-TiO2 allowed greater 1-hexene incorporation due to depression of the reactivity of the ethylene.The contribution of this work helps develop a better understanding of the role of nano-TiO2 in the catalytic activity of the polymerization system and in the microstructure of the polymer composite product.However,this study only considers work on the laboratory scale,so for commercial application of these results,it is necessary to scale up the polymerization process.It is only at this stage,that other physical properties,such as the mechanical properties of these materials can be sensibly determined.