辽化加氢裂化装置概述

概述辽阳石油化纤公司炼油厂1Mt/a加氢裂化装置的工艺路线、原料、催化剂、产品结构等的设计特点,采用辽河原油减压瓦斯油（VGO）进行试生产的情况以及装置改造的思路.     

Free vibration analysis of bridges

Most bridges are designed using a static analysis, adjusted by a dynamic amplification factor which is a function of the first flexural frequency. This method is imprecise but continues to be used, partly because of the apparently complex processes required to estimate accurately and to provide for the levels of vibration in a bridge. This paper investigates the natural frequencies and associated mode shapes of bridge superstructures. It compares field observations with theoretical idealizations and finds that, while a single beam idealization is accurate for straight, nonskewed bridges and for some continuous superstructures, many other bridges require an eigenvalue analysis of a finite beam element grillage. A simplified method for estimating the natural frequency of vibration is developed. An application of the Rayleigh method to a grillage model of the bridge, it is quick to apply and accurate to within 10%. The paper also compares the effects of using the static and dynamic moduli of elasticity of concrete in estimating the natural frequency of vibration, and concludes that the dynamic modulus is more appropriate. Finally, it debates the significance of certain types of support stiffness in estimating the fundamental frequency, and finds that their effect is negligible.     

PTT形态记忆织物的染整工艺

文章对PTT纤维及形态记忆面料的性能作了介绍.对PTT纤维记忆面料的染整工艺作了探讨.     

棉锦交织物活性/中性一浴法溢流喷射染色实践

对棉锦交织物采用活性/中性一浴法溢流喷射染色的可行性，进行了重点论述。并经过生产实践的验证，提出了具体的可行性染色工艺和用料，为棉锦交织物的短、平、快加工，指出一条新路。     

Electron spin resonance study of a cured epoxy resin exposed to high-energy radiation

Tetraglycidyl-4,4′-diaminodiphenyl methane cured with 4,4′-diaminodiphenyl sulphone was irradiated with varying dosages of 0.5 MeV electrons and 1.17 and 1.33 MeV gamma rays and was studied using electron spin resonance. The radical concentration increases with increasing radiation dose and decays, at ambient temperature, in a way consistent with a model that assumes two simultaneous second-order reactions occurring in different zones.     

Effect of 1.33 MeV γ radiation and 0.5 MeV electrons on the mechanical properties of graphite fiber composites

Epoxy/graphite fiber, polyimide/graphite fiber, and polysulfone/graphite fiber composites were exposed to 1.33 MeV γ irradiation and 0.5 MeV electron bombardment for varying periods of time. The effects of the irradiation treatments on the breaking stress and Young's modulus were studied by a three point bending test. Effects were small; indeed, both electron radiation up to 5000 Mrad and γ radiation up to 350 Mrad resulted in slight increases in both stress and modulus.     

Effects of water sorption at different temperatures on permanent changes in an epoxy

Crosslinked epoxy resins, tetraglycidyl 4,4′-diamino diphenyl methane cured with 4,4′-diamino diphenyl sulfone, were soaked in water at either 25°C or 70°C for varying lengths of time. The infrared spectra and DSC thermograms were obtained for samples that were soaked, or soaked and dried. There was a monotonic decrease in exothermic reaction energy with water content. The glass transition was also lowered, although samples soaked at 70°C showed a leveling in the T_g around 115°C. When the soaked samples were dried, the exothermic reaction energy showed near reversibility for samples soaked at 25°C while the 70°C samples were highly irreversible. IR of the latter samples showed that the 70°C water soaking resulted in reaction of some of the unreacted epoxide groups that remained after the initial cure.     

羊毛织物的抗菌肽整理

用NaAc/HAc缓冲溶液法和戊二醛固化交联法分别对羊毛织物进行抗菌肽整理,通过比较两种方法抗菌效果发现,戊二醛固化交联法的抗菌效果优于缓冲溶液法,尤其是在试样抗菌效果的耐水洗性方面。戊二醛固化交联加抗菌肽的优化整理工艺条件为:抗菌肽用量2.0 mL,戊二醛用量0.2%,固化pH值7.0,固化时间6 h。抗菌效果测试结果表明,此工艺整理的羊毛织物对金黄色葡萄球菌和大肠杆菌均具有良好的抗菌作用。