红外光谱法在毒品检测中的应用

采用傅立叶红外光谱技术建立甲基苯丙胺、海洛因和氯胺酮三种毒品标准品的红外谱图库;并利用此红外谱图库对甲基苯丙胺、海洛因及氯胺酮的常见疑似物进行检验。结果表明,通过分析比对疑似毒品检验物红外光谱图与标准品红外谱图库,能够取得良好的鉴别效果。     

红外光谱法在高分子材料分析中的应用

高分子材料是我国化工产品中一个重要的组成部分,而且在其它领域中的应用也越来越广泛,了解高分子材料的组成结构以便进一步改进其性能已成为一些化工研究者的专门课题。在高分子材料研究中,最常使用的分析方法是红外光谱法,该方法操作简单,易于掌握,能较直观地反映出化合物的结构变化。 对于一个未知的高分子材料的红外分     

红外光谱法在表面活性剂检测中的应用

红外光谱法检测样品简便快捷,检测限低,灵敏度高,应用广泛,是表面活性剂检测最常用到的方法之一。叙述了红外光谱仪对复杂表面活性剂的定性检测的3种方法,包括先提纯后检测、运用红外差谱软件和建立红外检测模型的方法。     

红外光谱法在润滑油劣化状态检测中的应用研究

润滑油在使用过程中会因氧化、污染等因素发生劣化,导致性能下降。红外光谱法作为一种常用于分析分子结构和化学变化的检测手段,可用于监测润滑油的劣化状态。基于红外光谱法,提出了特征吸收峰的劣化物识别、吸收峰变化的劣化状态分析以及多成分光谱反演的劣化评估方法,并通过实验验证了该技术的准确性和实用性,为润滑油劣化状态的实时监测和评估提供了有效的技术支持。     

用红外光谱法鉴别聚合物

虽然红外光谱法被认为是一种成熟的技术，但这项技术在大多数分析实验室未充分利用。最主要原因是目前人们热衷于从事产品微量材料的鉴定。该项技术未得到充分利用的其他因素是：(1)在特定领域获得足够的参考光谱图很困难；(2)单独从红外光谱图上得出分析结论还需要一定经验。     

用红外光谱法研究高岭石矿物

前言粘土矿物是硅酸盐工业的主要原料,特别是陶瓷坯釉、料的主要成分。它具有结合性和可塑性,具有结合非可塑性原料的能力。同时,又是Al_2O_3的主要来源,它使瓷坯呈白色,致密和形成一定数量的莫来石,莫来石使瓷件机械强度高、电气性能好,耐急冷急热性能好。高岭土是粘土的一种,是硅酸盐工业最理想的原料。它包     

红外光谱法分析饮料瓶塑料成分

采用傅立叶变换红外光谱仪对市售不同饮料瓶样品的塑料成分进行分析检验。此种方法操作简单、实验快速、检材无损,可以为检验鉴定工作提供一定的帮助和理论依据。     

FT-IR and XPS studies of polyurethane-urea-imide coatings

A series of polyurethane (PU)-urea-imide coatings were synthesized by a systematic three-step reaction process. Initially isocyanate terminated PU prepolymers were prepared by reacting soft segments such as polyester polyols (prepared from neopentyl glycol, adipic acid, isophathalic acid and trimethylol propane) or polyether polyols (polypropylene glycol-1000) with hard segments such as 2,4-toluene diisocyanate or isophorone diisocyanate with NCO/OH ratio of 2:1. Heterocyclic imide ring into the PU backbone was incorporated by co-polymerization with pyromellitic dianhydride (PMDA) from the excess NCO groups in the PU prepolymer with an NCO/anhydride ratio of 1:0.5 and the surplus NCO content after imidization was moisture cured. PU-urea-imide coatings were also obtained by partial chain extension of the excess NCO groups in the NCO terminated PU-imide copolymers, and the remaining excess NCO groups were completely reacted with atmospheric moisture. The obtained polymers were analyzed with Fourier transform-infrared (FT-IR) and angle resolved X-ray photoelectron spectroscopy (AR-XPS). The type and change in intermolecular H-bonding interaction in the PU-urea-imide films with structural variables was identified by deconvolution of the FT-IR spectra using Origin 6.0 software through Gaussian curve-fitting method. The FT-IR analyses of the PU-urea-imide coating films show dependence of phase separation on the nature of chain extender. Surface characterization data from AR-XPS suggests the dependence of phase segregation behaviour on the nature of the chain extender, which also supports the FT-IR observations.     

傅里叶变换红外光谱技术在聚氨酯行业中的应用进展

介绍了近年来国内外傅里叶红外(FT-IR)光谱技术在聚氨酯生产和研发中的应用进展,涉及到结构表征、氢键作用、反应机理、分子间作用、过程跟踪、附件技术和定量分析7个方面。     

丙烯酸双环戊二烯酯在UV固化反应中的FT-IR研究

用FT-IR对丙烯酸双环戊二烯酯(DCPA)中的丙烯酸双键和脂环双键在UV固化过程中和固化后的化学反应行为进行了研究。研究结果表明,在UV固化过程中丙烯酸双键几乎都反应掉,而脂环双键基本没有参与反应,而在UV固化后,脂环双键发生了加成反应。     

低煤化度煤经低温热解后各基团变化的研究

对兖州、大同煤及其低温热解后的试样进行ＦＴ－ＩＲ测试，确定各吸收带的归缩。采用内标法测定了各基团的相对含量，考察了它们随热解温度的变化。     

聚氨酯胶黏剂降解行为的在线红外表征

文中采用自制的“在线检测平台”与红外光谱方法相结合技术,进行了聚氨酯胶黏剂的热老化动力学研究,在125～150℃温度范围内聚氨酯胶黏剂的老化降解反应为二级反应,与固化反应有相同的反应级数。分析结果说明,在线FT—IR方法能直接反映高分子材料老化过程中的对应基团的变化,是老化机理研究的直接实验依据。该方法的建立为其他高分子材料老化机理和动力学的研究提供了有效的检测技术和试验装置。     

FT-IR characterization of Al-rich Li-, Na- and Ca-HMS

Starting from a micelle-templated material with Si/Al = 2.5 in the H form, three samples have been obtained by means of partial cationic exchange, with LiCl, NaCl and CaCl₂ alcoholic solutions. Their surface properties have been characterized by means of FT-IR spectroscopy of adsorbed probe molecules, namely CO, CO₂ and methylacetylene. Spectroscopic results showed that, though having a chemical composition close to that of cations exchanged Y zeolites, such materials exhibit different basic properties: in particular, no carbonate formation has been detected upon CO₂ adsorption, ruling out the occurrence of basic oxygens at the surface. These features have been ascribed to the amorphous nature of the walls to be contrasted with the crystalline structure of zeolites.     

红外光谱法鉴别氢化丁腈橡胶和丁腈橡胶

主要讨论了用溶解法和裂解法制样进行红外光谱分析鉴别HNBR与普通NBR的方法。     

红外计算机差谱技术在橡胶制品增强纤维剖析中的应用

采用热解法对从橡胶制品中剥离出的增强纤维进行了FT-IR光谱分析,应用Nicolet PC/IR软件中的差谱功能对浸渍在纤维表面的增粘成分进行了差减,得到了所期望的未知纤维的光谱,再行最后鉴定。方法对于那些难以分离完全的混合样品的剖析很有意义。     

傅里叶变换红外光谱法检验手帕纸包装袋的研究

利用傅里叶变换红外光谱法,对不同品牌、不同系列的手帕纸包装袋样本进行分析检验。依据红外光谱图中吸收峰,可以将手帕纸包装袋样本加以区分。该检验方法不破坏检材,重现性好,可用于鉴定手帕纸包装袋样本。     

Characterisation of an Egyptian coal by Mossbauer and FT-IR spectroscopy

Six coal samples collected from Maghara Coal Mine, North Sinai, Egypt, at different depths (52-87 m) were characterised by Mossbauer (MS) and Fourier Transform Infrared (FT-IR) spectroscopy. The moisture and ash content and the ultimate analysis are given. The iron minerals were studied by MS. Jarosite (ferric sulphate) and pyrite have been found in the sample taken at 52 m. However, ferrous sulphate and pyrite are present in the other samples. On the other hand, several structural parameters such as H_ar/H_al and H_ar/C_ar were calculated from FT-IR spectra as a function of depth. These parameters give a quantitative determination of the aromaticity, which was found in the range between 0.46 and 0.59, similar to that reported in the literature for subbituminous coals.