Dyeing properties of oxygen low-temperature plasma-treated wool and nylon 6 fibres with acid and basic dyes

Wool and nylon 6 fibres treated with oxygen low-temperature plasma were dyed with acid and basic dyes. Despite the increase of electronegativity of the fibre surface caused by the plasma treatment, the rate of dyeing of wool was increased with both dyes, while that of nylon 6 was decreased with the acid dye and increased with the basic dye.     

Synthesis, structure and fluorescence properties of a highly stable indium(III)-2,5-pyridinedicarboxylate coordination polymer

The hydrothermal reaction of 2,5-pyridinedicarboxylic acid (H₂PDC), diethylene triamine and In(NO₃)₃·4.5H₂O gave rise to a two-dimensional (2D) coordination polymer In(OH)(2,5-PDC). This compound crystallizes in the orthorhombic space group Iba2, with cell parameters, a = 12.656(3) Å, b = 20.114(4) Å, c = 6.2216(1) Å, V = 1583.9(5) Å³ and Z = 8. Its structure contains one-dimensional In–O–In–O– chains, which are further linked by 2,5-PDC ligands into a 2D supramolecular neutral framework. The adjacent 2D layers are parallel with each other and construct a three-dimensional framework via hydrogen bands. At room temperature, the compound exhibits intense photoluminescence. On the basis of the results of TG/DTA analyses, the structure is thermally stable up to 390 °C.     

STUDY OF PREVIOUS POWDER-PARTICLE BOUNDARY CARBIDES

本文研究了粉末镍基高温合金FGH95中PPB问题.结果指出,PPB碳化物在雾化过程中已开始形成,在热等静压过程中继续大量析出.由于PPB碳化物化学成分及组成复杂,不同类型碳化物可发生相互作用。热处理使PPB问题更加严重.PPB碳化物的形成主要是和合金中残留氧量有关.     

中区西部合理注水压力研究

注水压力是水驱油田注采压力系统中的重要参数,确定合理注水压力对调整层间矛盾、提高油田开发效果、降低套损等具有重大意义.合理的注水压力增加了吸水厚度和吸水层位,缓解了层间矛盾.注水压力过高导致吸水能力增强,降低了开发效果.高含水期的油藏注入压力一般通过实验获取.运用经验公式法和数值模拟法,在注水压力不超过地层破裂压力的情况下,计算该区块合理注水压力值,考察了脱气对原油黏度的影响进而对采收率的影响.该方法易于计算、精确度高,确定了中区西部合理注水压力值范围.结果 表明:中区西部合理注水压力为17.1～20.2 MPa时,有利于指导油田的高效开发.     

离子色谱法测定镀液中的六价铬离子

建立了用单柱阴离子色谱测定镀液中六价铬离子的方法.采用HPIC-CS5阴离子交换柱,以5.0 mmol/L碳酸钠和1.0 mmol/L碳酸氢钠的混合溶液作为流动相,电导检测器在20 min内完成镀液中六价铬的测定.该法具有良好的线性(相关系数约为0.996)和重复性(相对标准偏差小于5％),回收率在93％ ～107％的范围内.     

1991—1992国外工程塑料进展

介绍了1991～1992年国外工程塑料研究和生产概况。论述了通用工程塑料、特种工程塑料和聚合物合金的研究开发、改性和应用方面的进展。且指出工程塑料发展趋势和特点;对复合材料技术进展作了较详尽的分析与阐述。     

The effect of sputter etching on the surface characteristics of dyed aramid fabrics

Three kinds of aramid fabrics, Technora (modified p-aramid), Conex (m-aramid) and Kevlar (p-aramid), were subjected to sputter etching and argon low-temperature plasma treatments after dyeing in black with disperse dyes. The depth of shade increased considerably on Technora and Kevlar with the sputter etching treatment, but not on Conex fabrics. Argon low-temperature plasma treatment had virtually no effect on the depth of shade on the aramid fabrics.     

Si对过共析锰钢力学性能及晶界组织的影响

本文用ＳＥＭ、ＴＥＭ研究了Ｓｉ对过共析锰钢经９５０℃奥氏体化和５６０℃等温处理后的组织及力学性能的影响。结果表明，Ｓｉ提高冲击韧性和延伸率，抑制先共析渗碳体在奥氏体晶界呈连续网状析出，并促进在过共析钢中晶界铁素体的形成，本文重点讨论了含Ｓｉ过共析钢中晶界铁素体的形成机理及其对韧性的影响。     

INFLUENCE OF Al ON DUCTILITY IMPROVEMENT BY B IN Ni_3Al ALLOYS

The “order-disorder” model was adopted to calculate the lattice vacancies related to the com- position change in Ni_3Al alloys.A great deal of vacancies,i.e.,the non-stoichiometric vacan- cies,may exist in the Ni_3Al alloys containing Al over stoichiometry,i.e.25 at.-%.This was confirmed by the positron annihilation technique.Therefore,the influence of Al content on the enhancing behaviour of B towards the ductility of Ni_3Al alloys can be understood by the interaction of non-stoiehiometric vacancies and B atoms.     

含硅过共析钢晶界铁素体形成的热力学分析

将合金元素在珠光体相变时无分配状态下形成的含Ｓｉ合金渗碳体做为一种介稳相处理，利用规则溶液亚点阵模型和有关文献中的数据，计算了含Ｓｉ合金渗碳体相对于无Ｓｉ渗碳体的自由能增量δＧＦｅ３ＣＳｉ，得到了渗碳体中含Ｓｉ量和δＧＦｅ３ＣＳｉ的对应关系；并利用Ｓｉ在不同温度下的分配系数，计算了Ｓｉ对ＦｅＣ合金介稳态γ／［γ＋Ｆｅ３Ｃ］相界碳浓度（Ａ′ｃｍ）的影响。所得结果认为，含Ｓｉ过共析钢珠光体转变时在原奥氏体晶界出现连续网状铁素体，是Ｓｉ增加含Ｓｉ渗碳体自由能，从而提高了介稳态γ／［γ＋Ｆｅ３Ｃ］相界碳浓度（Ａ′ｃｍ）的结果。