用Ar气制备C—60的研究

在ｋｒａｔｓｃｈｍｅｒ碳弧法中用Ａｒ代替Ｈｅ制出Ｃ－６０。研究了Ａｒ压力为１．３３－９０．６４ｋＰａ时产的Ｃ－６０碳灰，功率消耗，提取率等的关系，并与用Ｈｅ制Ｃ－６０作了比较。     

Copper phthalocyanine as corrosion inhibitor for ASTM A606-4 steel in 16% hydrochloric acid

A study based on the corrosion inhibition properties of copper phthalocyanine is described. Coverage degrees of copper phthalocyanine (Cu-phcy) on ASTM-A606-4 steel, obtained by weight loss measurements, were fitted to Langmuir, Frumkin, Temkin and Flory–Huggins adsorption isotherms. A better fit to the Langmuir isotherm was obtained. The polarization curves showed that polarization of both the anodic and cathodic reactions were verified for concentrations higher than 10^–4 M, indicating a mixed type action. Only the anodic reactions were polarized for lower concentrations. At high frequencies the Nyquist diagrams showed one capacitive loop attributable to double layer charging and a small one at intermediary frequencies attributable to the faradaic process of hydrogen evolution. The formation of an adsorbed film was characterized by increasing charge transfer resistance values in the low frequency range for increasing inhibitor concentrations. According to the techniques used in this study, copper phthalocyanines showed a high corrosion inhibiting efficiency for all concentrations.     

CZF90测井中子发生器使用寿命浅谈

Ｃ／Ｏ测井中采用同步测量技术来分析非弹性γ与俘获γ，但在一些ＭＳＩ Ｃ／Ｏ测井中发现非弹性γ的一小部分或一大部分超前于非弹性门而进入俘获门，我们把这一问题叫做“错位”。“错位”使得Ｃ／Ｏ的ＣＩ值不正常，测井曲线不合格。这样的仪器不能用来测井。吉林油田测井公司碳氧比维修班成功地解决了Ｃ／Ｏ仪器“错位”等技术难题，在该油田所使用的ＣＺＦ９０－９４－０９发生器已测井８８口，累计打靶时间２３０ｈ，并且至今     

45号钢二次枝晶臂间距与冷却速度的关系

本文利用可控平均冷却速度的单向凝固实验炉测定了４５号钢在不同平均冷却速度下的冷却曲线，由此得到其在凝固期间的平均冷却速度Ｒ，相应地测量了不同平均冷却速度下试样的二次枝晶臂间距Ｓ２，通过回归，得到了如下关系式：Ｓ２＝７２７Ｒ－０．４１，并将引式成功地应用于实际生产中。     

气相处理对碳纤维表面及其复合材料性能的影响

本文对气相表面处理碳纤维的新工艺进行了系统研究。处理后的碳纤维强度、模量不下降,且其表面能、表面化学官能团含量明显增加;表面微晶结构变小,与环氧树脂复合后,层间剪切强度(LLSS)提高47%左右。本文还对复合材料断口的形态结构进行了分析,说明这种表面处理方法能有效改善碳纤维增强环氧树脂复合材料(CFRP)的界面粘结。     

生物降解型聚碳酸顺丁烯二酸亚乙酯 1、合成和表征

用CO_2、环氧乙烷、顺丁烯二酸酐进行三元共聚首次得到聚碳酸顺丁烯二酸亚乙酯(PECM),并用IR、~1H NMR、DSC等进行了表征,共聚物链中CO_2和MA单元随机分布,不饱和单元可在0～0.5mol分数之间调节。共聚过程不发生双键交联和构型转化。环氧乙烷的转化率可高达到93％。控制PECM链上的双键含量并使之发生自由基加成反应,得到对热较稳定的可溶性产物。     

A theory for the formation of tetrahedral amorphous carbon including deposition rate effects

A theoretical model is presented to describe the effect of ion beam bombardment rate on the formation of tetrahedral amorphous carbon (ta-C) films. The critical ion energy, E_c, corresponding to a 50% sp³ content in the films, is found to be dependent on both the effective thermal resistance and the ion beam bombardment rate. In the model, the ‘window’ width in the ion energy scale for the formation of ta-C material increases with decreasing deposition rate and with a reduction in the effective thermal resistance, until limited by lower and upper boundary thresholds. Experimental data are reproduced by the model. The plasmon energy, which correlates with sp³ fraction, is found experimentally of be higher for lower deposition rate and smaller effective thermal resistance. Data points for high sp³ content ta-C films deposited on silicon substrates at room temperature occupy a region in the ion energy-deposition rate (E-r) diagram similar to that predicated from the theory.     

镀Cu碳毡／环氧树脂复合的研制

研究了镀Ｃｕ碳毡／环氧树脂（ＣｕＣＦ／ＥＰ）复合材料的制备，并探讨了镀Ｃｕ量对碳毡电阻率，复合材料电阻率及其电磁屏蔽效率的影响规律，经合理工艺制得的镀Ｃｕ碳毡（４００ｍｇ．ｇ＾－１Ｃｕ－ＣＦ）含量为３００ｍｇ．ｇ＾－１ＣｕＣＦ／ＥＰ复合材料，其电磁屏蔽效率可在２０＝－１０００ＭＨＺ范围内达到６０ｄＢ。     

交联剂在碳／碳复合材料沥青基体中的作用

本文从C/C复合合材料的基体入手，分析了交联剂在沥青中的交联机理，并以此为基础对中温煤沥青在催化剂作用下进行交联反应。结果表明，交联剂在C/C复合材料基体中的交联作用非常明显，不仅基体本身的残碳率及耐热程度有很大提高，而且，以它制成的C/C复合材料的抗压强度也有显著增加。