中原高温高盐油藏疏水缔合聚合物凝胶调剖剂研究

针对中原油田高温(>80℃)、高盐度(>50 g/L)、高硬度(>1 g/L)砂岩油藏,研制了地下成胶的高热稳定性聚合物凝胶调剖剂。所用聚合物为疏水缔合聚合物AP-P4,M=9.0×106,HD=27%,疏水基摩尔分数0.2%;交联剂为可生成酚醛树脂的3种化合物;调剖剂胶液用矿化度160 g/L的马寨油田污水配制;实验温度95℃。根据形成的凝胶黏度(95℃,1.1 s-1)确定交联剂各组分用量为:MZ-YL 0.429%,MZ-BE 0.060%,MZ-XS 0.012%;酸度调整剂用量0.12%;成胶时间10~15小时。2.5、3.0、3.5 g/L AP-P4的凝胶在95℃老化100天后黏度保持在~40 Pa.s及以上。初配制胶液在3000 r/min下剪切15分钟后黏度降低87.5%~89.0%,但成胶后和老化过程中凝胶黏度只比未剪切样降低17.1%~6.6%。3.5 g/L AP-P4的调剖剂对~1μm2的6支储层岩心的堵塞率在88.1%~95.8%范围,平均93.3%,造成的残余阻力系数在15.2~28.6范围,平均19.8,使渗透率级差2.3~8.0的4组双人造岩心的注水流量比发生不同程度的反转。认为该凝胶调剖剂高温下稳定性好的原因,是强化学交联密度低,因而凝胶脱水收缩作用弱。图2表5参5。     

聚乙烯管材的国内外发展及应用

介绍国内外PE管材的现状和发展前景、以及管材专用料的生产、研究情况     

刹车片减震胶的研制

讨论了高邻位酚醛树脂合成及其它助剂对减震胶性能的影响。研究试制出一种综合性能好的减震胶。     

WF40防腐蚀涂料在原料水罐上的应用

中国石化股份有限公司洛阳分公司炼油厂污水汽提装置的原料水罐(V303)由于接触的污水中含有H2S,NH3,CO2,CN-,酚等多种腐蚀介质因此经常发生腐蚀泄漏事故。经涂刷WF40玻璃鳞片防腐蚀涂料后,已平稳运行两年。2002年检修检查,涂层完好,仍在继续使用。WF40涂料为环氧型玻璃鳞片涂料,其热膨胀系数与钢质基体接近,因此具有耐热冲击性强等优点。待涂罐体经喷砂除锈到Sa2.5级后,涂底漆2道,中间涂层2道、面漆2道,使干膜厚度达到350μm,可有效防止腐蚀性介质的渗透。     

Mechanical properties and thermal stability of rice husk ash filled epoxy foams

Mechanical properties and thermal stability of epoxy foams filled with white and black rice husk ash were studied. Epoxy foams were prepared from a commercial system and filled with different amounts of both the ashes (0, 6.8, 12.8, 18.0, and 22.7 wt %). The incorporation of both the ashes modified the final morphology of the foam, decreasing the average cell size and increasing the number of cells per volume unit. For all filler percentages used, the specific modulus and strength results showed that the white ash is more effective as reinforcing agent than the black ash. The initial degradation temperature was not affected by the content and type of ash used as the filler. The integral procedure decomposition temperature, weight loss, and char residue results were related to the ash type and atmosphere used in the thermogravimetric analysis. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci, 2006     

Thermal and mechanical properties of epoxy composites reinforced by a natural hydrophobic sand

If a low weight percentage of crude fine fillers can improve properties of polymer materials directly without complicated chemical treatment process involved, it will be significant for many industrial applications. Our previous study indicated that a kind of Cancun natural sand could be an effective filler material for polymer composites. In this current work, the epoxy composites reinforced by this kind of natural sand particles were prepared and thermal and mechanical properties of the composites containing up to 5 wt % of the sand particles were characterized. Results showed that the highest flexural strength appears in the epoxy composite containing 1 wt % sand particles. A damage model was used to interpret the flexural properties, which showed an acceptable agreement with the experimental results. The glass transition temperature, high temperature storage modulus, and dimensional stability of the sand/epoxy composites monotonically increased with the addition of the sand particles. The sand particle/epoxy composites also displayed a noticeable enhancement in thermal conductivity. Theoretical analysis showed that in addition to conduction, other heat transport mechanisms played roles in the improved heat transmission through the composites. As a natural porous micron-scale material, Cancun sand has the potential for applications in cost-effective composites with enhanced mechanical and thermal properties. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Time and temperature effect on the linear–nonlinear viscoelastic transition threshold of a polymeric system

In the present study, the transition of a polymeric material from the linear to the nonlinear viscoelastic behavior and the determination of the nonlinearity stress threshold variation with time and temperature are investigated. For this purpose a systematic experimental program consisted of thermal and mechanical characterization of certain polymeric material followed by isothermal creep tests at different stress levels and temperatures was conducted. Through isochronal curves that occurred from creep tests, the nonlinearity threshold dependence on both time and temperature is presented. The reported results provide information that is critical for the design and development of polymer structures and components. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

氯氧镁水泥对不饱和树脂的阻燃性能与阻燃机理研究

采用极限氧指数法、热重分析和烟密度测试法研究了氯氧镁水泥在不饱和树脂（UP）中的阻燃作用和阻燃机理。研究表明经偶联剂处理后的氯氧镁水泥对UP具有良好的阻燃抑烟效果，并通过增加UP在高温下的热稳定性和降低热失重速率等机理发挥阻燃作用：氯氧镁水泥含量在40％内对UP的力学性能影响较小，是一种新型的无机添加型阻燃剂。     

叶子花红色素提取工艺的优化

本文研究了用树脂吸附和分离叶子花红色素，比较了4种树脂对叶子花红色素的吸附，在叶子花红色素提取过程中用AB－8树脂吸附，洗脱剂用40％的乙醇，洗脱效果好，且AB－8树脂使用20次后吸附性能仍稳定。     

混合C=9制备壬基酚的研究

研究了以强酸性阳离子交换树脂为催化剂，以混合C9^=为原料制备壬基酚的工艺条件及树脂的再生方法，并考察了催化剂及再生剂的使用寿命。结果表明，混合C9^=可用于制备壬基酚，在110℃、苯酚与C9^=物质的量比为2．5、催化剂与C9^=质量比为30％的条件下连续反应64h，C9^=平均转化率达到85．9％，催化剂可反复多次再生使用，并具有较长的使用寿命。