热敏物料的蒸馏及常用设备(I)——蒸馏过程的特征

本文描述了热敏物料的蒸馏特点 ,蒸馏过程和某些热敏物质的热反应过程同时进行 ,并以热敏度和非热敏度为目标进行了数学模拟计算     

热敏物料的蒸馏及常用设备(Ⅰ)--蒸馏过程的特征

本文描述了热敏物料的蒸馏特点，蒸馏过程和某些热敏物质的热反应过程同时进行，并以热敏度和非热敏度为目标进行了数学模拟计算。     

热敏染料及热敏记录纸

本文重点介绍荧烷类热敏染料的发展、主要品种及性能，同时对热敏记录纸的发色机理及其制备进行概述。     

有机酸酯水解对水性聚氨酯凝聚的影响

介绍了水性聚氨酯热敏凝聚的原理和优点,研究了有机酸酯热敏剂水解作用下的羧酸盐阴离子型水性聚氨酯的凝聚过程,讨论了有机酸酯的种类、用量、水解温度等对羧酸盐阴离子型水性聚氨酯凝聚的影响。结果表明,引起羧酸盐阴离子型水性聚氨酯凝聚的酸度临界点是pH2.70,其中草酸二乙酯的热敏效果达到实验要求;热敏剂中草酸二乙酯与磷酸盐缓冲溶液的体积比大于5∶3,树脂与热敏剂的质量比在10∶1左右,热敏温度为80℃比较合适。     

热敏变色纤维材料

详细介绍了热敏变色材料的发展和目前的研究情况 ,常用变色剂的类型及其变色机理和热敏变色纤维的制造方法。     

热敏物料的蒸馏及常用设备(Ⅱ)--常用设备

继前文（1），本文介绍了几种常见的用工热敏物料蒸馏的设备，并讨论了他们的各自特点和适用范围，这些设备在目前热敏物料的分离中都占有重要的地位。     

UV光固化热敏记录层机理的研究

以光固化丙烯酸酯树脂作为基体，硬脂酸、聚乙二醇硬脂酸酯等为添加物，制备了一种可逆热透明成像材料的UV光固化热敏记录层。利用DSC仪、偏光显微镜以及X射线衍射仪研究了添加的硬脂酸和聚乙二醇硬脂酸酯对UV光固化热敏层的作用机理。研究结果表明，硬脂酸和聚乙二醇硬脂酸酯结晶态与无定形态之间的转变是UV光固化热敏层发生白色浑浊态与透明态转变的直接原因，且两者的共同作用扩大了UV光固化热敏层的显透温度范围，另外，利用热分析仪对热塑性热敏层和光固化热敏层的耐热性作了比较。结果表明，UV光固化热敏层在升温过程中的热损失较热塑性的热敏层有明显降低。     

热敏形状记忆高分子材料及其应用

介绍了热敏形状记忆高分子材料及其应用。热敏形状记忆高分子材料是通过温度的变化实现形状的记忆与改变,利用其形状记忆功能,热敏形状记忆弹性体可应用在热缩管、油田封隔器、医用外科、保险杠等领域。     

热敏染料FH—102的合成

归纳了热敏染料ＦＨ－１０２的不同合成方法，并进行了工艺选择。对中间体及产品的合成研究进行了总结与讨论。     

热敏物料间歇精馏过程

热敏物料是受热会发生化学反应产生杂质的物料,广泛存在于化学工业生产中,其分离提纯比较困难.间歇精馏过程是分离热敏性物料的一种重要方法.本文介绍了热敏物料受热险度和热稳定性指数概念以及热敏物料精馏设备的评价方法.综述了热敏物料间歇精馏工艺及设备的研究进展,如:冷存料循环釜式热敏物料间歇精馏、带有动态侧线出料的热敏物料间歇...     

探讨敲击检测技术在复合材料无损检测中的应用

本文根据纤维增强复合材料的特性,列出了损伤的主要类型和产生原因;对适用于复合材料制品的无损检测敲击技术进行探讨;对敲击技术的基本原理、方法分类、适用范围进行介绍;对传统敲击法和数字敲击法进行比较;总结敲击法的未来发展状况。     

不同芯材热敏变色微胶囊的制备及性能研究

以隐色染料结晶紫内酯、酚酞、苯酚红、甲基红为电子给予体、显色剂双酚A为电子接受体和十二醇为溶剂,制备了可逆热致变色复配物,以密胺脂为壁材,通过原位聚合法进行微胶囊化研究,并对制备条件进行了优化。利用扫描电子显微镜、热重分析法等对微胶囊进行了结构与性能表征。     

Application of the general rate model with the Maxwell-Stefan equations for the prediction of the band profiles of the 1-indanol enantiomers

The adsorption isotherm data of R- and S-1-indanol and of their racemic mixture on cellulose tribenzoate were measured by frontal analysis. These experimental data were fitted to the single-component and the modified competitive Bilangmuir isotherms. The overloaded elution profiles of bands of the pure enantiomers and of the racemic mixture were calculated for different sample sizes, using the best competitive isotherm model and the General Rate Model of chromatography coupled with the generalized Maxwell-Stefan equation that describes the surface diffusion flux. The calculated and the experimental profiles were found to be in excellent agreement in all cases. The parameters of the model of the mass transfer kinetics were derived from the band profiles obtained for the pure enantiomers. The same values of these parameters give an excellent prediction of the profiles of multicomponent bands. The new model described here allows a satisfactory interpretation of the competitive mass transfer kinetics.     

噁二唑啉类化合物合成方法综述

噁二唑啉类化合物由于其良好的生物活性广泛应用于医药,农药领域。将噁二唑啉杂环引入其他化合物中,往往能生成一系列具有广谱生物活性的新化物。因此,在新药设计中,噁二唑啉杂环常被用于化合物的结构修饰。近年来,有关这类化合物的合成方法不断得到更新。作者对近年来噁二唑啉类化合物合成方法及反应机理进行了全面综述。     

碳化塔内壁鼓包的测定与修复

报道了对某化肥厂碳化塔内壁鼓包进行检测的过程和结果以及修复方法。首先对塔内外壁进行了检验。随后对塔体每个筒节和每个鼓包用测厚仪进行壁厚测定,并对选定的鼓包进行切片检验。最后对鼓包进行了修复。修复后的碳化塔运行状况良好。由此总结出碳化塔修复的要求和技术措施,并对该设备的安全运行提出了建议。     

Dependence of the dyeability of modified cotton on the substituents and the nature of the dye

Cotton cellulose was chemically modified by introducing acrylamide, acrylonitrile and carboxyalkyl moieties in the form of groups or polymers. In carbamylethylated, cyanoethylated and carboxymethylated cotton, these moieties are in monomeric groups, whereas, in graft copolymers of cotton cellulose with acrylamide, acrylonitrile or acrylic acid, the moieties are in polymeric forms. These substrates were dyed independently using direct, acid, basic or reactive dyes. Results showed that at roughly equal nitrogen content, polyacrylamide–cotton graft copolymer exhibited a much higher colour strength than carbamylethylated cotton when the two substrates were dyed using basic dye. The opposite is the case for direct and reactive dyes. The acid dye produced comparable colour strengths. Similar trends were observed when the other samples were dyed with these four dyes. The results were explained in terms of microstructural changes in the physical and chemical structure of cotton caused by the etherification and grafting reactions.     

影响特级苯纯度的原因分析及应对措施

通过定性定量实验,确定了影响特级苯纯度的主要杂质:环己烷、甲基环己烷、甲苯,并对杂质的性质、来源及分离方法进行研究;分析了工艺上影响特级苯纯度的几个关键操作过程,有针对性地制定了控制粗苯原料质量、提高溶剂质量、稳定加氢系统操作、调整脱重操作指标、调节萃取操作、降低纯苯塔塔底温度等措施;使纯苯纯度由原来的99.90%提高到99.95%以上,质量等级由优等品提高到特等品。     

金属表面原位摩擦自修复陶瓷涂层的机理研究

在金属表面涂覆一层一定配比的超细硅酸盐陶瓷粉末材料和催化剂,经金属表面间的速摩擦作用制备了陶瓷涂层,并通过TEM、SEM等浏试手段研究了陶瓷涂层的成分分布及组织结构,分析了陶瓷涂层的形成机理。     

Effect of the Incorporation of PVC on the Mechanical Properties of the Jute-Reinforced LLDPE Composite

Jute fabrics-reinforced linear low density polyethylene (LLDPE) matrix composites (50 wt% fiber) were prepared by compression molding and mechanical properties were studied. Polyvinyl chloride (PVC) matrix was incorporated instead of LLDPE in the jute based composites and their mechanical properties were investigated and compared with the control composites. It was found that with the increase of PVC in the LLDPE based composites, the mechanical properties were found to improve significantly. Degradation tests of the composites for upto 24 weeks were performed in soil medium. Water uptake and Thermo-mechanical properties of the composites were also studied.     

三聚甲醛生产中影响产品质量因素的探讨

文章对三聚甲醛的用途及生产工艺进行了介绍,并对聚甲醛行业聚合反应对三聚甲醛质量的要求进行了简单分析,对在三聚生产过程中影响产品质量的几个重要因素进行了探讨,并重点介绍为提高三聚甲醛质量所采取的相应措施。