二烯类橡胶的乳液加氢研究

通过在水合肼、过氧化氢氧化还原体系,使用Ｃｕ２＋作为催化剂对二烯类的丁苯、丁腈及聚异戊二烯橡胶进行了乳液加氢实验研究,其加氢率分别为９０％及５０％,聚异戊二烯加氢率较低,主要受其结构的影响,此外乳胶粒径大小对加氢率也有较大的影响。     

一种红外测温装置的设计

本文简述了一种用于蛋白陶瓷照相工艺中的红外测温装置的设计。由于应用了单片机及功能软件开发 ,使得电路简单、测温准确     

富勒烯C60衍生物的合成及其分子沉积膜的制备

采用NaOH和发烟硫酸对富勒烯C60进行化学处理，合成了富勒烯磺酸基化合物和羟基化合物，采用红外光谱、紫外—可见光吸收光谱对富勒烯衍生物进行表征，并分别与聚电解质(PDDA)进行了分子沉积膜实验，结果显示富勒烯磺酸基化合物能较好地获得分子沉积膜。     

智能小车的自动化控制

介绍了以单片机为核心，采用红外反射式传感器作为其视觉系统，直流电机为执行机构的智能化小车的设计与实现。系统核心采用AT89C51单片机，系统驱动采用控制方式为双向PWM的直流电机。该技术可以广泛应用于无人驾驶机动车、无人工厂、仓库、服务机器人等领域。     

5-（4-硝基苯基）-10，15，20-三苯基卟啉及其金属配合物的合成与光谱性质

硝基取代的卟啉是合成生物活性分子的有效单体．有广泛的应用价值。它的合成是重要的研究课题。由于硝基的强吸电子性．使硝基苯基卟啉的合成难度加大。本文以四苯基卟啉（TPP）为原料．通过硝化反应合成了5-（4-硝基苯基）-10，15，20-三苯基卟啉，并进一步合成了其金属配合物（Mn，Zn）。利用紫外可见光谱、红外光谱、核磁共振氢谱．对合成产物进行了结构表征，对不同产物的紫外、红外谱图进行了对比分析。与卟啉配体相比，金属卟啉的分子对称性有所提高，吸收峰的数目相应减少。     

微钢管轴向导热对对流换热的影响

以氮气为工质,流过内径为168μm、外径406μm微钢管,采用直接通电法进行加热,并使用红外成像仪加红外专用放大镜头测量了在恒定的流量下、不同加热功率以及相同加热功率、不同流量下的微钢管壁面的温度场,获得精确的微管外壁温度分布,同时测量了氮气的进出口温度和流量.根据实验结果分析了微管轴向导热对管内部对流换热的影响.研究表明,在氮气为工质下,微钢管轴向导热导致内部换热的减弱,减少量超过总对流换热量的2%.     

壳聚糖席夫碱钯配合物的合成与表征

用水杨醛改性后的壳聚糖席夫碱与PdCl2反应得到壳聚糖席夫碱钯配合物.壳聚糖、壳聚糖席夫碱及其钯配合物用红外光谱(IR)、X-射线光电子能谱(XPS)、X-射线衍射光谱(XRD)、热分析(TG-DTA)以及荧光光谱等分析手段进行了表征分析,根据表征结果提出了壳聚糖席夫碱钯配合物的可能结构.     

天然橡胶与合成天然橡胶在溶剂型橡胶系压敏胶粘剂中的应用研究

介绍了天然橡胶(NR)与合成天然橡胶(IR)特点、分子质量差别;对比2者10%甲苯溶液的黏度;测试2者压敏粘合性能;讨论不同增粘树脂对性能的影响,NR、IR与TMTD、MDI交联反应的差异,耐光老化性能差异。研究结果表明,NR持粘性和耐热性较好,IR初粘性和剥离强度较好;对于NR和IR压敏胶都是C5石油树脂的初粘性最好,萜烯树脂的剥离强度最高;TMTD可与NR、IR反应,提高耐热性能;MDI只能与NR反应,不能与IR反应,交联反应后提高耐溶剂性能;加入防老剂都能提高NR、IR耐光老化性能。     

A revisitation of the polymorphism of poly(butylene-2,6-naphthalate) from periodic first-principles calculations

Periodic density functional theory calculations are here used to investigate polymorphism in poly(butylene-2,6-naphthalate) (PBN) and to understand the intra- and inter-molecular effects which are responsible for its behavior. Despite its similarity to poly(butylene terephthalate), the larger π-electron conjugation promoted by the presence of naphtyl rings generates peculiar intramolecular effects and stronger interchain packing interactions which cause some differences between the two polymers. This is particularly evident by comparing the structural and spectroscopic data predicted for the α and β crystals with respect to the respective one dimensional infinite chain models. Two different interpretations have been proposed in the previous literature to describe the structural transitions from the α to the β polymorph of PBN upon mechanical deformation or thermal treatments: from one hand, the setting on of a transplanar conformation on the methylene chains has been proposed while, on the other hand, a larger coplanarity of the ester groups and the naphtyl rings has been suggested. Our calculations reveal that both these effects are present in β-PBN and should be both taken into account to give an interpretation of the trends observed by IR spectroscopy and structural characterization.     

Indicators for evaluation of progress in thermal stabilization reactions of polyacrylonitrile fibers

Using different indices calculated from Fourier Transform Infrared Spectroscopy (FTIR), X‐ray Diffraction (XRD), and Differential Scanning Calorimetry (DSC) spectra, progress in stabilization reactions of three different commercial grade polyacrylonitrile (PAN) fibers is calculated. From each analysis technique quantitative indices are computed which could assess in some particular reactions. Combination of these indices gives further information about the progress of stabilization reactions which cannot be concluded from single indices. The results show that different indices are not fully consistent with each other, depending on the analysis technique and the changes they assess. The advantages and disadvantages of each index are investigated and practical indices are identified which can be used to design the optimum stabilization process. In addition, by combination of some indices it is possible to separate the temperature ranges in which reactions occur in amorphous or crystalline regions. This approach can be used to design appropriate stretching process during stabilization. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40343.