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     

红外节能涂料的研制和应用

论述了提高工业炉窑使用寿命和节能等多功能的低、中、高温远红外辐射涂料的机理、性能、制备、施工和应用。     

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。     

石油树脂在涂料工业中的应用

论述了石油树脂的发展现状及应用方向，着重讨论其在涂料工业中的应用。     

红外光谱法在涂料剖析中的应用

介绍了用红外光谱仪分析涂料中成膜物、颜填料、溶剂、助剂的实验方法,并举例说明红外光谱仪作为一种高效、实用的分析工具在涂料剖析鉴别中的应用     

红外光谱法快速测定彩涂钢板氟碳涂料中PVDF的含量

采用红外光谱法定量测定了彩涂钢板氟碳涂料中PVDF的含量。用衰减全反射傅里叶变换红外光谱技术,得到了不同PVDF含量样品的红外光讲图,以朗伯-比尔定律为理论依据,分别选取PVDF和丙烯酸树脂的特征吸收峰为各自的定量参比峰,得出参比峰面积比与树脂质量比的线性回归方程。比较了不同的参比峰和吸光度的表征方法,得出分别以874cm^-1和1730cm^-1吸收峰作为PVDF和丙烯酸树脂的定量参比峰,以固定波数段积分法求取吸收峰面积时得出的线性回归方程结果最佳,其相关系数为0．999,测定方差为2．77×10^-4,最大相对误差为1．37％。该方法迅速简捷、稳定可靠。     

多晶矿化黑陶红外涂料及其在炉窑上的应用

红外加热用多晶矿化黑陶瓷红外辐射涂料耐火温度达１７９０℃以上，法向全发射率εｎ大于０．９０。它能涂抹于炉窑内衬耐火砖表面，起抗高温气流冲刷，侵蚀，提高炉窑使用寿命和节能等多种效果，已大量成功地应用于各种加热炉，均热炉，退火炉和锅炉等。     

云母粉在涂料工业中的应用

简介了云母粉的晶体结构、性质。介绍了云母粉在颜料、涂料、建筑涂料和其它特种涂料中的应用。     

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。     

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。     

An FT-IR spectroscopic study of carbonyl functionalities in bio-oils

Pyrolysis bio-oil contains abundant O-containing structures. Carbonyls are particularly important not only because they are abundant and exist in many forms (e.g. as acids, esters, ketones and aldehydes) but also because they are reactive and are a key consideration of bio-oil upgrading. This study aims to investigate the distribution of carbonyl groups in a variety of bio-oil samples prepared from the pyrolysis of mallee wood, bark and leaves in a fluidised-bed reactor. Some bio-oil samples also underwent esterification reactions with methanol in the presence of solid Amberlyst acid catalyst. The bio-oil samples were diluted with isopropanol prior to the acquisition of FT-IR spectra using a CaF₂ liquid cell. The FT-IR spectra of bio-oils in the range of 1490–1850 cm⁻¹ were deconvoluted with 9 Gaussian bands. Our results reveal that the bio-oils from the pyrolysis of wood, bark and leaves of the same mallee tree species had very different concentrations and types of carbonyls, which are related to the contents of hemicellulose, cellulose, lignin and extractives in the wood, bark and leaves. Our study also reveals that the carbonyls in the light and heavy fractions of a bio-oil may react differently during the reactions of bio-oil with methanol in the presence of the Amberlyst solid acid catalyst.     

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。