润滑剂TAF在改性工程塑料中的应用

介绍润滑剂改性乙撑双脂肪酸酰胺(TAF)的独特结构及其与聚合物良好的相容性,以及它在聚合物中良好的分散性,并以实际应用效果表明,TAF对改善玻纤增强工程塑料的玻纤外露具有十分明显的效果,从而改善了玻纤增强工程塑料的表面粗糙度。     

Preparation and properties of polyimide/silica hybrid composites based on polymer‐modified colloidal silica

A new type of polyimide/silica (PI/SiO₂) hybrid composite films was prepared by blending polymer‐modified colloidal silica with the semiflexible polyimide. Polyimide was solution‐imidized at higher temperature than the glass transition temperature (T_g) using 3,3′,4,4′‐biphenyltetracarboxylic dianhydride (BPDA) and 4,4′‐diaminodiphenyl ether (ODA). The morphological observation on the prepared hybrid films by scanning electron microscopy (SEM) pointed to the existence of miscible organic–inorganic phase, which resulted in improved mechanical properties compared with pure PI. The incorporation of the silica structures in the PI matrix also increased both T_g and thermal stability of the resulting films. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2053–2061, 2006     

A Study on the Friction and Wear Behavior of PTFE Filled with Acid Treated Nano‐Attapulgite

Summary: A solid lubricant composite material was prepared by compression molding PTFE and acid treated nano‐attapulgite. The friction and wear tests were performed on a block‐on‐ring wear tester. Scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometer (EDS) and DSC were utilized to investigate material microstructures and examine modes of failure. Experimental results showed that there was no significant change in coefficient of friction, but the wear rate of the PTFE composite was orders of magnitude less than that of pure PTFE. Acid treated nano‐attapulgite was superior to untreated nano‐attapulgite in enhancing the wear resistance of PTFE. Moreover, the wear resistance of the composite increased monotonically with increasing treated attapulgite concentration. Investigation of transfer film and analysis of debris for PTFE and its composite showed that acid treated nano‐attapulgite filled to PTFE could facilitate formation of transfer film on the steel ring surface and inhibit breakage of PTFE molecular chain. The PTFE composite with higher heat absorption capacity exhibited improved wear resistance. Furthermore, the steel ring counterface abrasion was not found.

Effect of load on the wear rate of PTFE and its composites.     

年产200吨4，4’-二氟二苯甲酮（DFBP）的工业化设计及可行性研究

本文在大量实验数据基础上，对4，4’-二氟二苯甲酮(DFBP)进行了年产200吨规模的工业化设计，从技术关键、工艺流程、设备选材、三废治理及成本核算等方面对DFBP工业化设计的可行性进行了评价，该设计有如下特点：工艺简单、合理，操作稳定、安全，三废治理有效，原材料及设备投资少，见效快，适合工业化大生产。     

2H-1,4-苯并噁嗪类化合物合成研究进展

综述了不同取代基的2H-1,4-苯并噁嗪类化合物的合成方法。可以概括为两大类,其一以邻胺基苯酚或间卤苯酚为原料,与不同的-α卤代酸或酯反应,反应中不需要催化剂,在工业生产中普遍采用;另一类是用钯作催化剂,能扩大化合物的类型,并可选择性合成光学活性物质。     

PC／TPU共混物的流变性能

用毛细管流变仪研究了聚碳酸酯（ＰＣ）及聚碳酸酯／热塑性聚氨酯弹性体（ＰＣ／ＴＰＵ）共混物的流变性能。实验结果表明：ＰＣ熔体粘度对剪切速率（γ）不敏感，而对温度（Ｔ）敏感。温度升高，ＰＣ粘度降低。加入ＴＰＵ大大改善了共混物的流动性能，使共混物的成型加工变得容易进行。当ＴＰＵ含量为４０份时，共混物的熔体粘度出现一极小值。加入不同第三组分对于降低共混物的熔体粘度效果不同，第三组分Ｅ对共混物有增粘作用     

福建三钢焦化废水处理工艺的改造

通过对福建三钢煤化工有限公司废水处理系统生物脱氮工艺的改造，使出水水质达到国家规定的一级排放标准。同时，对焦化废水处理工艺流程、设备及工艺参数等方面进行了调整和改进，为焦化废水生物脱氮工艺的设计和运行提供了借鉴。     

腐植酸类物质凝聚及沉淀特性的研究

通过对不同产地，不同提取方法获得的煤炭腐植酸和经过生物发酵人工合成的生化黄腐酸分别进行铝离子絮凝实验和酸化沉淀实验，发现煤炭腐植酸、腐植酸盐、棕惰酸、黄腐酸都同时具有被铝离子定量絮凝和在酸性条件下定量沉淀的特性，这类物质具有极其相近的化学特性。生化黄腐酸在上述两方面显示出与煤炭腐植酸十分不同的特性。     

The partition coefficients of ethylene between hydrate and vapor for methane + ethylene + water and methane + ethylene + SDS + water systems

The hydrate formation of CH₄+C₂H₄ mixture was studied experimentally in two different cases, with and without the presence of sodium dodecyl sulfate (SDS) in water. The results manifested that the presence of SDS could not only accelerate the hydrate formation process, but also increase the partition coefficient of ethylene between hydrate and vapor drastically. The partition coefficients of ethylene between hydrate and vapor for methane + ethylene + water with the presence of 500 ppm SDS in water were then systematically measured. The experimental temperature ranged from 273.15 to 278.15 K, the pressure ranged from 2.5 to 5.5 MPa, the initial gas-liquid volume ratio ranged from 95 to 240 standard volumes of gas per volume of liquid, and the mole percentage of ethylene in feed gas mixture ranged from 5.28% to 79.36%. The results demonstrated that ethylene could be enriched in hydrate phase and partition coefficients were increased with the presence of SDS in water. This conclusion is of industrial significance; it implies that it is feasible to recover ethylene from gas mixture, e.g., various kinds of refinery gases or cracking gases in ethylene plant, by forming hydrate.     

规整填料铜洗塔的设计及其应用

对采用具有新型塔内构件的高效规整填料铜洗塔,其设计和改造的工艺计算、结构设计、系统要求等进行详细说明和分析,并介绍两散装填料铜洗塔改规整填料塔的应用实例。实践证明,运用该技术改造现有铜洗塔,可降低精炼气中一氧化碳的含量,提高精炼气质量,达到增产降耗的目的。