高抗冲聚苯乙烯的研制 Ⅰ.预聚合反应动力学及相转变过程的研究

对HIPS预聚合反应阶段的动力学及相转变行为进行了研究,发现基础胶的种类、用量、搅拌速率及阻聚剂含量对苯乙烯预聚合反应动力学和相转变过程均有不同程度的影响。     

离子色谱法测定配煤、焦炭和焦油中的氯含量

研究了用带电导检测器的离子色谱对配煤、焦炭和焦油中的Cl- 进行测定的方法。在YSA型8126A-4# 阴离子分离柱上用3.5mmol/LNa2CO3、5.3mmol/LNaHCO3做淋洗液对Cl-进行测定,方法简便快速。Cl-的检出限为2×10-6。该法也适用于F-、NO2-、NO3-、SO42-等的测定。     

Preparation of superparamagnetic immunomicrospheres and application for antibody purification

A novel and effective protocol for the preparation of superparamagnetic immunomicrospheres has been developed. First, micro‐size magnetic poly (methacrylate‐divinylbenzene) (PMA‐DVB) spheres were prepared by a modified suspension polymerization method. The oleic acid coated magnetite (Fe₃O₄) nanoparticles made by coprecipitation were mixed with monomers of MA, DVB, and initiator benzoyl peroxide (BPO) to form oil in water emulsion droplets with the presence of poly (vinyl alcohol) (PVA‐1788) as a stabilizer. The polymerization reaction was carried out in a 2‐L beaker equipped with four vertical stainless steel baffleplates by increasing the temperature of the mixture at a controlled rate. The resulting magnetic microspheres are micro‐sized (less than 8μm in diameter) and 80 percent of them are in the size ranging from 1 to 5 μm. Then, they were highly functionalized via ammonolysis reaction with ethylenediamine, and the surface amino‐modified magnetic microspheres were obtained. The morphology and properties of these magnetic microspheres were examined by SEM, TEM, VSM, and FT‐IR. Affinity ligand protein A (ProtA) was covalently immobilized to the amino‐modified magnetic microspheres by the glutaraldehyde method. These ProtA‐immobilized magnetic immunomicrospheres were effective for affinity bioseparation processes, as was demonstrated by the efficient immunoaffinity purification of antibodies IgG2a (22mg per gram of microspheres) from mouse ascites. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2205–2211, 2004     

气相色谱-质谱联用法测定金属皂中的多环芳烃

建立了金属皂中16种美国环保局(EPA)优先监控的多环芳烃的气相色谱-质谱(GC/MS)联用测定方法,样品先用二甲基亚砜萃取,再用环己烷进行反萃取,经硅胶柱净化后,用GC/MS分离测定。优化了16种多环芳烃(PAHs)的分离测定条件,结果16种PAHs的平均回收率为75.32%￣98.72%,精密度实验相对标准偏差(RSD)为2.19%￣6.93%,检测限(S/N=5)为0.002￣0.010mg/kg。该方法灵敏度高、准确性好,完全可以满足金属皂中多环芳烃的检测要求。     

子午线轮胎生产设备的国产化及其存在的问题

对生产子午胎的九大类主要设备：炼胶设备、帘布覆胶设备、覆胶帘布裁断设备、复合挤出机及其生产线、钢丝圈设备、内衬层（气密层）生产线、成型设备、硫化机、成品检测设备进行了分析，总结介绍了我国橡机企业在这九大类设备的设计制造方面取得的成绩和水平，并与国际现状进行了对比。最后总结了我国子午胎设备目前的优势和不足。     

W2-3乙烯基酯树脂在精细化工中的应用

研究了W2-3酚醛环氧乙烯基酯树脂在精细化工生产的许多环节中的防腐蚀应用,对实际工程应用提出了一些建议.     

Viscoelastic properties of phenolphthalein poly(ether ketone)

Stress relaxation and dynamic mechanical behavior of phenolphthalein poly(ether ketone) (PEK-C) have been investigated. Using Ferry's reduction method, the master curve was obtained. From the experimental results, we found that the WLF equation is not appropriate in the lower-temperature range (T < T_g). The relaxation spectrum was calculated according to the first approximation method proposed by Schwarzl and Staverman. In addition to the α-transition region, a second transition zone is revealed at low temperature. This transition is probably due to a restricted motion of its main chain. © 1995 John Wiley & Sons, Inc.     

丙二醇单甲醚丙酸酯合成体系的气相色谱分析

自行研制了氰乙基(25%,质量分数)甲基硅橡胶(XE-60)石英毛细管色谱柱。建立了对含游离酸的丙二醇单甲醚丙酸酯的色谱分析方法。该法具有分离效果好,分析速度快的优点。     

RuCl3一步催化氧化液相乙醇合成1,1-二乙氧基乙烷

首先考察了不同金属卤化物对乙醇一步液相氧化合成1,1-二乙氧基乙烷(DEE)的催化性能。结果表明,RuCl_3催化性能最好。然后考察了反应条件的影响,结果表明,以50 mL无水乙醇(0.86 mol)为反应物时,最佳催化反应条件为:反应温度120℃、氧气压力2MPa、反应时间3h、催化剂用量0.004%(以乙醇的物质的量为基准,下同)、搅拌速度600 r/min,此时乙醇转化率达到38.2%,DEE选择性达到78.9%。并且发现,Ru~(3+)不但对乙醇氧化成乙醛具有较高的催化活性,同时RuCl_3是一种温和的路易斯酸,可以较好地催化乙醇与乙醛的缩合反应。最后对RuCl_3催化剂的重复使用性进行了考察,催化剂重复使用20次后,依然有较高的催化活性。     

Effects of the solvent polarity on the atom transfer radical polymerization of methyl methacrylate initiated by 4‐(chloromethyl)phenyltrimethoxysilane

The controllability of the atom transfer radical polymerization of methyl methacrylate in the polar solvent N,N‐dimethylformamide and the nonpolar solvent xylene with 4‐(chloromethyl)phenyltrimethoxysilane as an initiator and with CuCl/2,2′‐bipyridine and CuCl/4,4′‐di(5‐nonyl)‐2,2′‐bipyridine as catalyst systems was studied. Gel permeation chromatography analysis established that in the nonpolar solvent xylene, much better control of the molecular weight and polydispersity of poly(methyl methacrylate) was achieved with the CuCl/4,4′‐di(5‐nonyl)‐2,2′‐bipyridine catalyst system than with the CuCl/2,2′‐bipyridine as catalyst system. In the polar solvent N,N‐dimethylformamide, unlike in xylene, the polymerization was more controllable with the CuCl/2,2′‐bipyridine catalyst system than with the CuCl/4,4′‐di(5‐nonyl)‐2,2′‐bipyridine catalyst system. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 2751–2754, 2007