聚丙烯酸酯类冲击改性剂质量缺陷的剖析方法

一些国产聚丙烯酸酯类冲击改性剂与国外同类优质产品相比还有一定的差距,探索了一套参照国外优质产品剖析其质量缺陷的方法,具有简单易行,可操作性强的特点,在对粒径、核壳比、分散性、交联度的剖析过程中,避开了复杂的实验手段。对粒径和分散性剖析时主要采用双辊辊压,观察所得片材透明性的办法;在对交联度剖析时利用了冲击强度对测试温度的依赖关系;对核壳比剖析时则直接观察辊压片材的软硬程度,这样就使得剖析结果具有较强的针对性。     

低温固化聚丙烯酸酯植绒粘合剂的合成

采用MA、BA为软单体,MMA为硬单体,NMA和AA为交联单体,OP和SDS为乳化剂,过硫酸钠为引发剂合成可低温固化的聚丙烯酸酯植绒粘合剂.研究了单体用量及配比、引发剂用量、乳化剂用量及配比、温度等因素对单体转化率的影响,确定较好的工艺条件.应用该粘合剂植绒时,100℃/6min固化,植绒产品手感柔软,各项指标均达到标...     

纺织用粘合剂的研究开发进展

粘合剂是一类重要的纺织助剂，在现代纺织工业中得到广泛应用。本文就其合成方法、组织结构、性能及应用等多方面进行评述．     

纺织用高性能喷胶棉粘合剂的研制

利用种子乳液聚合方法制备了用于喷胶棉粘合剂的高性能苯丙乳液,研究了乳化剂、引发剂、交联剂、反应温度、反应时间及搅拌速率等因素对该苯丙乳液性能的影响,在此基础上确定了最佳的工艺条件。当软硬单体的质量比为30/70、乳化剂用量为3.6%、引发剂用量为0.6%、交联剂用量为2%、反应温度为76～85℃、反应时间为75 min、搅拌速率为300 r/min时,所得苯丙乳液的性能最佳。     

溶剂型聚丙烯酸酯类压敏胶的研制

采用溶液聚合制备了溶剂型聚丙烯酸酯类压敏胶．讨论了改性单体的种类及用量、链转移剂的用量、引发剂的加入方式、聚合反应温度、胶液黏度和烘胶温度对压敏胶粘接性能的影响。实验表明,丙烯酸可以全面提高压敏胶的粘接性能,引发剂的加入方式能够有效调节聚合产物分子质量,链转移剂可以维持聚合反应的稳定性,适当的胶液黏度和烘胶温度将有利于提高压敏胶的粘接性能。     

柔软型自交联涂料印花粘合剂的研制

合成了柔软型自交联聚丙烯酸酯类涂料印花粘合剂，井对单体的配虑、乳化剂的配虑及用量、引发剂用量、反应温度和时间进行了研究，确定了最佳合成工艺。     

GC-MS法测定合成革中乙二醇醚及其酯类残留量

建立了气相色谱-质谱法测定合成革制品中5种乙二醇醚及其酯类残留量的方法。以乙酸乙酯为萃取液,超声波提取样品中的待测组分,甲醇沉淀絮凝高聚物,气相色谱-质谱联用仪测定,质谱图及保留时间定性,外标法定量。线性范围在0. 1～10 mg/L线性良好,加标回收率为86. 6%～117. 2%,相对标准偏差(n=6)为3. 9～6. 9%,方法定量限0. 5～1. 0 mg/kg。该方法前处理简单,操作简便,灵敏度高、检测限低,可用于合成革制品中乙二醇醚及其酯类残留量的测定。     

气相色谱-质谱法测定化妆品中苯甲酸酯类和对羟基苯甲酸酯类16种防腐剂

建立了测定化妆品中苯甲酸酯类和对羟基苯甲酸酯类防腐剂的气相色谱-质谱（GC-MS）方法。样品经饱和氯化钠和乙酸乙酯提取,离心后取上清液用乙腈定容。提取液经HP-5ms毛细管色谱柱（30 m×250μm×0.25μm）分离,采用选择离子监测模式（SIM）扫描测定,外标法定量。16种防腐剂在相应的线性范围内线性关系良好,其中苯甲酸酯类的检出限和定量限分别为0.3μg/g和1μg/g,对羟基苯甲酸酯类的检出限和定量限分别为0.6μg/g和2μg/g。实验选取了3种基质在两个水平下验证方法的回收率和精密度,16种防腐剂的加标回收率为85.4%～113.8%,相对标准偏差（RSD,n=6）≤10.9%。检测的50批婴幼儿类化妆品中对羟基苯甲酸甲酯和对羟基苯甲酸丙酯的使用频率最高,分别为50%和36%,添加量均符合规定。     

聚氨酯/聚丙烯酸酯互穿网络涂料印花粘合剂的制备和应用

本文综述了聚氨酯/聚丙烯酸酯互穿网络(IPN)涂料印花粘合剂。介绍了IPN粘合剂的制备方法及其不同配比时对拉伸强度、断裂伸长率、摩擦牢度性能的影响。IPN粘合剂可克服聚丙烯酸酯粘合剂的延伸性差、湿摩擦牢度低、易吸尘和粘搭性强的缺点,是改进聚丙烯酸酯类粘合剂性能十分有效的方法。     

Adhesive Bonding of Oil-Contaminated Steel Substrates

Durability of adhesive bonds formed by curing epoxies against oil-contaminated steel substrates using amidoamine curing agents was determined during exposure to boiling water. The most durable bonds were obtained using amidoamine curing agents with relatively low amine numbers and by blending silane coupling agents such as γ-glycidoxypropyltrimethoxysilane (γ-GPS) and N-(2-aminoethyl)-3-aminopropyltrimethoxy silane (AAMS) into the adhesives. When X-ray photoelectron spectroscopy (XPS) was used to characterize the failure surfaces of the adhesive joints after exposure to boiling water, it was determined that adhesives prepared using amidoamine curing agents with low amine numbers were able to displace the oil from the steel surface but adhesives prepared with amidoamine curing agents with high amine numbers were not. Results obtained from XPS also showed that the amino groups on the substrate fracture surfaces of joints prepared using curing agents with low amine numbers were protonated whereas the amino groups in the bulk adhesive were not, indicating that there was a chemical interaction between the curing agent and the hydrated surface of the substrate. It was also shown using infrared spectroscopy that the amidoamine curing agents formed salts with calcium compounds in the oil.     

Adhesive Bonding of Oil-Contaminated Steel Substrates

Durability of adhesive bonds formed by curing epoxies against oil-contaminated steel substrates using amidoamine curing agents was determined during exposure to boiling water. The most durable bonds were obtained using amidoamine curing agents with relatively low amine numbers and by blending silane coupling agents such as γ-glycidoxypropyltrimethoxysilane (γ-GPS) and N-(2-aminoethyl)-3-aminopropyltrimethoxy silane (AAMS) into the adhesives. When X-ray photoelectron spectroscopy (XPS) was used to characterize the failure surfaces of the adhesive joints after exposure to boiling water, it was determined that adhesives prepared using amidoamine curing agents with low amine numbers were able to displace the oil from the steel surface but adhesives prepared with amidoamine curing agents with high amine numbers were not. Results obtained from XPS also showed that the amino groups on the substrate fracture surfaces of joints prepared using curing agents with low amine numbers were protonated whereas the amino groups in the bulk adhesive were not, indicating that there was a chemical interaction between the curing agent and the hydrated surface of the substrate. It was also shown using infrared spectroscopy that the amidoamine curing agents formed salts with calcium compounds in the oil.     

Chemical interactions in the system anodized aluminum—primer—adhesive

Chemical interactions in the primed aluminium/adhesive interphase were examined using IR reflectance spectroscopy. For the case of epoxy primers and polyurethane adhesives, a new absorption was detected and was attributed to an isocyanate group, formed by reaction between the epoxide primer and the polyurethane adhesive. When polyurethane adhesive was applied on a polyurethane primer, such a primer-adhesive interaction was not noticed.     

详析陶瓷原料的质量控制及对应分析方法

本文概述了陶瓷原料常用的性能指标及相应的分析方法,并讨论了各项指标在陶瓷生产中的意义,为保证陶瓷原料的稳定性提供了保障基础。     

Möglichkeiten der Röntgenfluoreszenz- und Röntgenemissions-Spektrometrie in der Werkstoffanalytik

The principles and applications of X-ray fluorescence spectrometry and X-ray emission in the electron microprobe analysis and low energy electron induced X-ray spectrometry were described. With the help of soft X-ray spectra, arising from the valence bands, the different aluminum and titanium compounds of precipitates in steel can be investigated. The precipitates were isolated by an galvanostatic electrolysis. For speciation of aluminum the K_βlines in the X-ray fluorescence spectrum were investigated. The composition of aluminum oxide and -nitride in precipitates of special steel qualities can be determined. In the case of the speciation of titanium a direct electron bombardment of the sample is used to generate soft-X-rays. By investigating the L-lines of titanium different species like titaniumcarbide,-nitride or sulphide can be distinguished.     

一种催化重整芳烃的快速分析方法

采用气相色谱建立了芳烃快速分析法,该方法分析速度快、精确度高,适用于催化重整生成油的芳烃组成分析,可以替代传统的PONA方法进行C6A～C10A＋芳烃组成分析,成功应用于催化剂评价在线快速分析研究。     

Infrared spectroscopic monitoring of urea addition to oriented strandboard resins

One of the variables in phenol formaldehyde adhesive resin formulation is the addition of urea, which allows the resin manufacturer to manipulate both product functionality and cost. Nitrogen content can be used as a measure of the level of urea addition because most of the nitrogen present is derived from urea added at the end of the preparation process. Nitrogen analyses of a set of commercial oriented strandboard resins were first determined by combustion analysis. IR spectroscopic data were then collected and used along with the values for nitrogen content to generate predictive models. First, principal component analysis demonstrated the ability to separate resin mixtures from low to high nitrogen content. Partial least squares regression was then performed and gave excellent correlations between the measured and predicted nitrogen contents for a set of unrelated (test) resins and a set of mixtures prepared through combinations of resins with known nitrogen contents. Similar results were obtained on both a wet and dry mass basis. Given the flexibility of this instrumentation, such analyses could be placed in‐line for real time monitoring of resin applied during panel manufacturing. © 2007 Wiley Periodicals, Inc. JAppl Polym Sci 2007     

改性沥青中聚合物含量化学检测方法及红外光谱验证

针对道路以及防水工程施工过程中需要快速准确确定改性沥青中SBS含量的问题,建立一种新的现场快速确定SBS含量的化学分析方法。在此基础上应用红外光谱对该分析方法的分析过程进行分析并验证其有效性,结果表明：新分析方法能完全提取改性沥青中的SBS,且提取的SBS纯度高,检测精度满足实际应用要求。     

近红外光谱分析技术及应用进展

近红外光谱技术是近年来用于分析测试行业的一门新技术。对近红外光谱分析技术的概况、原理、特点进行了论述,介绍了该技术在石油化工行业中的应用,探讨了近红外光谱分析技术在炼油企业中的应用前景。     

含氟织物整理剂单体1H,1H,2H,2H-全氟烷基丙烯酸酯的分析方法研究

建立了含氟织物整理剂单体1H,1H,2H,2H-全氟烷基丙烯酸酯的毛细管气相色谱分析方法,以正辛醇为内标,对长链氟烷基丙烯酸酯中最主要的3种成分C10F21CH2CH2OOCCHCH2、C8F17CH2CH2OOCCHCH2、C6F13CH2CH2OOCCHCH2准确定量,加标回收样的回收率为99．8％,RSD为0．95％。