傅里叶变换拉曼光谱及其在橡胶分析中的应用

简介了傅里叶变换拉曼光谱（ＦＴ－Ｒａｍａｎ）仪的结构及特点，综述了ＦＴ－Ｒａｍａｎ在橡胶及其相关材料分析中的应用。     

傅里叶变换红外光谱在橡胶研究中的应用

综述了傅里变换红外光谱在橡胶的表征、化学反应及加工使用过程中的应用情况。     

两种罗汉果多糖的IR及13C NMR分析

利用FT IR和13C NMR技术对罗汉果中的两种多糖SGPS1(Siraitia grosvenorii Polysaccharides,SGPS)和SGPS2进行分析。从SGPS1和SGPS2的红外吸收(4000-500 cm-1)可知,它们具有典型的多糖吸收特征,SGPS1中的单糖残基以吡喃环和呋喃环的形式存在,SGPS2中的单糖残基以α-吡喃环的形式存在。同时运用13C NMR证实了这两种多糖的单糖残基环状构型及糖苷键构型。     

红外光谱在橡胶硫化体系中的应用

综述了红外光谱在橡胶硫化体系中的应用,包括表征硫化胶的结构及组成、硫化反应化学机理、反应中结构变化等。     

几种塑料的傅里叶变换拉曼光谱分析

采用傅里叶变换拉曼光谱(FTIR)技术对几种塑料样品进行了分析,并给出了几种塑料的傅里叶变换拉曼光谱图。该方法具有快速、准确、操作简便、重复性好、不需对样品进行分离,可直接分析等特点。     

傅里叶变换衰减全反射红外光谱在顺丁橡胶分析中的应用

研究傅里叶变换衰减全反射红外光谱(ATR-FTIR)在顺丁橡胶(BR)分析中的应用,得到多个BR的ATR-FTIR特征谱。结果表明:通过ATR-FTIR谱可以快速区分BR的生胶与硫化胶,便于未知胶料的鉴定;可以判断硫化胶中是否含有白炭黑。用ATR-FTIR谱分析BR方便、快捷。     

波谱学在催化剂表征中的应用

介绍了红外光谱，拉曼光谱，核磁共振，X光电子能谱的表征能力及其在表征催化剂中的作用。红外和拉曼光谱可用于研究表面分子和载体结构；核磁共振可得到分子或原子团所处的化学环境；X光电子能谱可以了解元素的化学态，了解和掌握这些表征有助于进行催化剂的研究。     

八种不同来源二氧化硅的红外光谱特征研究

本文采用傅里叶变换红外光谱法,比较分析了八种不同来源二氧化硅红外特征谱的异同.结果显示,八种不同来源二氧化硅的红外光谱相似,但由于形成机理或合成方法不同,因而具有一些各自的红外特征谱.根据这些红外光谱特征峰,可以区分不同来源的二氧化硅,为二氧化硅开发、研究及选用提供了科学依据.     

傅里叶变换红外光谱技术在法庭科学中的应用现状

傅里叶变换红外光谱技术因其方法简单快捷、结果准确直观、样品损耗小、检测成本低廉而被认为是适合分析各类物证的技术之一。通过介绍傅里叶变换红外光谱技术的原理及运用傅里叶变换红外光谱技术进行死后间隔时间推断、避孕套有关成分分析、微生物鉴定、土壤分析和车辆物证分析等几个方面阐述了其在法庭科学领域中的研究和应用现状,希望能够为该技术在法庭科学中的应用提供参考,并为鉴定相关案件中的物证提供一种新的思路。     

傅里叶变换红外光声光谱在火炸药研究领域中的应用

阐述了傅里叶变换红外光声光谱（FTIR－PAS）的基本原理，测试条件及其在火炸药研究领域中的应用，证实了该技术在含能材料分析和研究中的实用价值。     

红外光谱技术的进展及其应用

对漫反射、衰减全反射傅里叶变换红外光谱和差谱等技术及其应用进行了简单介绍     

Application of DMEU/SiO2 gel solution in the antiwrinkle finishing of cotton fabrics

In this experiment, cotton fabrics were treated by padding, drying, and curing with an antiwrinkle finishing reagent, dimethylolethylene urea (DMEU), in combination with different concentrations of tetraethoxysilane (TEOS) and isopropanol (IPA) at various volumes. The treated fabrics were studied to determine the effects of adding TEOS and IPA. They were also analyzed using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) methods to examine the binding between SiO₂ and DMEU. The results showed that hydrogen bonds formed between SiO₂ and DMEU. TEOS was found to improve the antiwrinkle properties, tensile strength retention, and yellowing of the treated fabrics, although their softness was slightly reduced. The solvent IPA was shown to decrease the tensile strength of treated fabrics, although it improved their antiwrinkle properties. We observed only one stage of pyrolysis in untreated cotton fabrics, whereas the treated fabrics showed two stages. In addition, the fabrics treated with TEOS showed improved heat resistance. Our findings demonstrated that cotton fabrics showed excellent antiwrinkle properties and high tensile strength, when treated with a finishing solution composed of DMEU, 3% TEOS, IPA and water, followed by predrying and curing. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 4136–4143, 2006     

傅立叶变换红外光谱法在橡胶分析中的应用与进展

简介了用橡胶分析的傅立叶变换红外光谱透射法，漫反射ＦＴＩＲ法，衰全反射ＦＴＩＲ法，ＦＴＩＲ－光声光谱法，ＦＴＩＲ仪与各种仪器的联用，以及计算机技术在ＦＴＩＲ分析中的应用与进展。     

Characterization of sacha inchi (<Emphasis Type="Italic">Plukenetia volubilis</Emphasis> L.) oil by FTIR spectroscopy and <Superscript>1</Superscript>H NMR. Comparison with linseed oil

Three oil samples obtained from sacha inchi (Plukenetia volubilis L.) seeds were studied by means of FTIR and ¹H NMR. Frequency data of the most significant bands of the IR spectrum of this oil are given. These data show that sacha inchi oil has a high degree of unsaturation. The same fact is deduced from the ratio between the absorbance of the bands due to the stretching vibrations of the cis olefinic CH double bonds at 3010.5 cm⁻¹ and to the methylene symmetrical stretching vibrations at 2855.1 cm⁻¹. The proportions of monounsaturated, polyunsaturated, and saturated acyl groups were predicted from the frequency of some IR bands, and these were in satisfactory agreement with the values obtained through FAME generation and their quantification by GC. Likewise, simple observation of the ¹H NMR spectra provided a great deal of information about sacha inchi oil, with regard not only to the relative proportions of the different acyl groups but also to their nature. Thus, the presence of γ-linolenic acyl groups was discounted. Furthermore, the area of some ¹H NMR signals was used to determine the proportion of saturated and mono-, di-, and triunsaturated acyl groups, which also were in satisfactory agreement with the values obtained by classical methods. IR and ¹H NMR determinations take very little time in comparison with classical methods and do not require chemical manipulation or transformation of the sample. A comparison was also made between the compositions of sacha inchi and linseed oil. Both oils are important sources of the healthful n−3 linolenic acyl groups, and sacha inchi also contains high proportions of the n−6 linoleic acyl groups.     

Hydrolysis and condensation of alkoxysilanes investigated by internal reflection FTIR spectroscopy

The hydrolysis of a series of alkyl-substituted alkoxysilanes and an antimicrobial quaternary ammonium silane was investigated in water-acetone solvents by Fourier transform infrared (FTIR) spectroscopy. An internal reflectance cell was employed for the investigation. Rates of sequential hydrolysis of the first, second, and in one case the third alkoxy groups were extracted by nonlinear regression of curves of methanol concentration plotted versus time using data obtained from the FTIR spectra of the reaction mixture. Acid catalysis of the hydrolysis was observed. Condensation of the silanol groups produced by the hydrolysis was investigated using similar techniques and rate data are presented.     

Functionalized poly(ether ether ketone): Improved mechanical property and acellular bioactivity

Poly(ether ether ketone), PEEK, was functionalized by addition of pendant functional groups, that is, acetyl, carboxylic, acyl chloride, amide, and amine groups in the benzene ring of polymer backbone without substituting the parent (ether or ketonic) functional groups of polymer to improve the mechanical and surface adhesivity with acellular inorganic biomaterials. The functional groups of virgin PEEK and functionalized PEEK were identified by Fourier transform infrared spectroscopy and ¹³C nuclear magnetic resonance. The crystallinity was studied by X‐ray diffraction and further supported by differential scanning calorimetry (DSC) analysis. Similarly, the change in glass transition temperature was confirmed by the DSC and dynamic mechanical analysis (DMA). The improved mechanical property was also evaluated by DMA. The excellent surface adhesivity and bioactivity were revealed by acellular in vitro test using simulated body fluid. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011