光学轮廓仪对光学元件表面空间波长回应的研究

在分析光学轮廓仪的空间分辨率和带限功率谱密度函数的基础上，用新测不同要品的大量数据研究了光学元件表面粗糙度测量与光学轮廓仪对表面空间波长的带限顺应关系，对由光学轮廓仪不同带宽限制内测量元件表面粗糙度不同回应所引起的不同偏差的解决办法提出了几点建议。     

对数正态分布场合恒加试验的数据分析与容忍限

本文在寿命分布为对数正态分布场合,对恒定应力加速寿命试验的数据分析进行了讨论。利用加速应力水平下的寿命数据给出了正常工作应力水平下产品寿命的容忍限,并以一数值例加以说明。     

Thermokinetic Behaviour Degenerated from Limit Cycle Oscillation of Isothermal B-Z Reaction System due to Temperature Controlling of Heat Compensation Type

The thermokinetic behavior of the B-Z reaction system was influenced by both the chemical reaction-heat conduction coupling and the temperature undulation due to temperature controlling of heat compensation type. Quantitative research indicated that this kind of temperature fluctuation will lead to limit cycle degeneration and the periodic or quasi-periodic response behavior of the focus near a supercritical Hopf bifurcation.     

Ethylene Oligomerization Catalyzed by Nickel（Ⅱ） Diimine Complexes

Ethylene oligomerization has been investigated by using catalyst systems composed of nickel(II) diimine complexes (diimine = N, N′‐o‐phenylene bis (salicylideneaminato), N, N′‐o‐phenylenebisbenzal, N, N′‐ethylenebisbenzal) and ethylaluminoxane (EAO). The main products in toluene and at 110–200 °C were olefins with low carbon numbers (C₄—C₁₀). Effects of reaction temperature, Al/Ni molar ratio and reaction period on both the catalytic activity and product distribution were explored. The activity of 1.84 × 10⁵ g of oligomer/(mol_NI · h), with 87.4% of selectivity to C₄—C₁₀ olefins, was attained at 200 °C in the reaction when a catalyst composed of NiCl₂ (PhCH = o‐NC₆H₄N = CHPh) and EAO was used.     

配位化合物分子内配体间的疏水缔合作用(Ⅱ)——镉(Ⅱ)、钴(Ⅱ)-邻二氮菲-氨基酸体系

pH电位法研究了镉(Ⅱ)、钴(Ⅱ)与邻二氮菲和甘氨酸、丙氨酸、缬氨酸、亮氨酸、苯丙氨酸和色氨酸等配体在37℃、离子强度I=0.02(NaCl)条件下形成12组混配配合物的稳定常数。lgK_(MAB)~M、△lgK和lgX值表明,亮氨酸、苯丙氨酸和色氨酸的混配配合物具有额外稳定性,并从配体间疏水缔合作用方面对该稳定性进行了重点讨论。     

改性有机硅微乳的制备

采用特殊的生产工艺及预乳化方式，选择合适的表面活性剂和有机硅活性物，可以制得稳定，透明的改性有机硅微乳，改善了织物整理效果。     

DEPOLYMERIZATION AND KINETICS OF DEPOLYMERIZATION OF POLYETHYLENE TEREPHTHALATE USING DIBUTYLTIN OXIDE CATALYST

Depolymerization of poly（ethylene terephthalate） （PET） was performed in the tubular bomb microreactor which contained the solution of PET in methanol and dibutyltin oxide at the temperature ranging from 433 K to 473 K, the reaction time from 5 to 45 min and the catalyst-to-PET ratio of 0.3%-2% by weight. The optimal condition for PET depolymerization catalyzed by dibutyltin oxide is the temperature of 443-453 K, the reaction time of 20-25 min and 0.8% by weight of catalyst. By using differential methods, the activation energy for the depolymerization process was found to be 154.05 kJ/mol in the temperature range from 433-463 K.     

新型疏水缔合丙烯酰胺/2-苯氧乙基丙烯酸酯共聚物的合成与性质

采用胶束共聚方法合成了一种新型的疏水缔合共聚物 ,它由丙烯酰胺 (AM)和少量的 2 苯氧乙基丙烯酸酯 (POEA) (<1 0mol% )组成 ,具有良好的水溶性 .当溶液浓度超过一定值c 后 ,由于分子间的疏水缔合 ,产生很大的增粘作用 .研究了不同聚合条件下包括单体浓度、投料比和SMR值对聚合物的结构和性能的影响 .实验结果表明 ,聚合物的粘度性质和缔合行为取决于其分子量的大小、疏水单体含量及其嵌段的长度和分布 .     

超声辅助液液萃取法提取烟用香精成分的研究

采用超声辅助液液萃取法(ULLE)提取某品牌烟用香精成分,GC-MS对其进行分析,研究了不同萃取剂、萃取时间和萃取温度对分析结果的影响,初步确定了最佳条件为:以二氯甲烷为萃取剂,饱和NaCl溶液作水相,室温下超声萃取5 min.又分别与同时蒸馏萃取法(SDE)和传统的液液萃取法(LLE)作以比较,对ULLE法和SDE法鉴定出的化学成分、重现性和定量值进行了对比.结果表明:超声辅助液液萃取具有操作简便、快速、节能、萃取效率高、重现性好等特点,适合于烟用香精成分的提取.     

PrCl3—MgCl2—LiCl三元体系液相限的研究

熔盐体系相图对于研究其各种物理化学性质及电解制备金属是很重要的,但含稀土氯化物体系相图至今报道甚少,作为系列研究含稀土氯化物的三元相图工作之一,本文通过实验测定了PrCl_3-MgCl_2-LiCl三元体系液相限。该相图未见报道。 相关的三个二元体系相图已有文献报道。PrCl_3-LiCl与PrCl_3-MgCl_2属二元简单低共熔体系,其低共熔点的组成分别为71.3wt％PrCl_3(470℃)和59.8wt％PrCl_3(645℃);MgCl_2-LiCl体系相图属有最低点的连续固溶体类型,其最低点组成为