去除丙烯腈产品过氧化物工艺技术

丙烯腈是重要的化工产品。随着丙烯腈下游产品加工的多元化,对丙烯腈产品中过氧化物含量也有不同的要求,过氧化物超标的问题时常困扰着丙烯腈生产企业,直接影响到丙烯腈产品的销售和市场竞争力。探讨了去除丙烯腈产品过氧化物的工艺技术,解决了丙烯腈装置过氧化物超标的难题。     

聚氨酯/丁腈橡胶互穿网络型吸水膨胀橡胶的性能研究

将丁腈橡胶与高吸水树脂（SAP）、增强剂、聚乙二醇（PEG）和二苯基甲烷二异氰酸酯（MDI）等在开炼机上充分混合,在高温下PEG和MDI发生逐步聚合反应,与丁腈橡胶原位互穿,得到互穿网络型吸水膨胀橡胶（IPN-SWR）。研究了聚氨酯（PU）用量对互穿网络型吸水膨胀橡胶的机械性能和吸水膨胀性能的影响。结果表明,随着PU含量升高,橡胶的机械性能下降,吸水速率加快,最大质量膨胀倍率（ΔWe）先升高后降低,质量损失率降低,循环测试次数越高,膨胀性能下降,质量损失率变小。同种材料的胶筒制品的膨胀速率远远小于试片的膨胀速率。     

Aluminium-Aluminium Bonding by Rubber Blend Based on Epichlorohydrin Rubber and Carboxylated Nitrile Rubber

Rubber blends based on epichlorohydrin rubber and carboxylated nitrile rubber can be used as adhesives for aluminium-aluminium bonding. The bond strength depends on blend composition and moulding conditions, such as time, temperature and pressure. Lewis acid/base type interaction is responsible for this type of adhesion. The failure mechanism of the composites was studied by SEM.     

Effect of interfacial chemistry on the linear rheology and thermal stability of poly(arylene ether nitrile) nanocomposite films filled with various functionalized graphite nanoplates

Poly(arylene ether nitrile) (PEN) nanocomposites filled with functionalized graphite nanoplates (GNs) were prepared by a simple solution‐ casting method and then characterized by rheometer and thermogravimetric analysis (TGA). This study investigates how the surface treatment of GNs affects the GN dispersion state. The linear rheological test indicated that the 4‐aminophenoxyphthalonitrile‐grafted GN (GN‐CN) presented better dispersion in PEN matrix than purified GN because the corresponding composite showed the lower rheological percolation threshold, which was further confirmed by scanning electron microscopy and solution experiments. The TGA revealed that the presence of 4‐aminophenoxyphthalonitrile‐grafted GN retarded the depolymerization evidently compared with that of purified GN, showing remarkable increase in the temperatures corresponding to a weight loss of 5 wt % (increased by 21°C) and maximum rate of decomposition (increased by 9°C). Both the dispersion state and the surface functionalization of GN are very important to the thermal stability of PEN matrix. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013     

Natural rubber/nitrile butadiene rubber/hindered phenol composites with high-damping properties

New natural rubber (NR)/nitrile butadiene rubber (NBR)/hindered phenol (AO-80) composites with high-damping properties were prepared in this study. The morphological, structural, and mechanical properties were characterized by atomic force microscopy (AFM), polarized Fourier transform infrared spectrometer (FTIR), dynamic mechanical thermal analyzer (DMTA), and a tensile tester. Each composite consisted of two phases: the NR phase and the NBR/AO-80 phase. There was partial compatibility between the NR phase and the NBR/AO-80 phase, and the NR/NBR/AO-80 (50/50/20) composite exhibited a co-continuous morphology. Strain-induced crystallization occurred in the NR phase at strains higher than 200%, and strain-induced orientation appeared in the NBR/AO-80 phase with the increase of strain from 100% to 500%. The composites had a special stress–strain behavior and mechanical properties because of the simultaneous strain-induced orientation and strain-induced crystallization. In the working temperature range of a seismic isolation bearing, the composites (especially the NR/NBR/AO-80 (50/50/20) composite) presented a high loss factor, high area of loss peak (TA), and high hysteresis energy. Therefore, the NR/NBR/AO-80 rubber composites are expected to have important application as a high-performance damping material for rubber bearing.     

HDPE／NBR共混物流变性能研究

通过熔融共混法制备了HDPE／NBR共混物,用毛细管流变仪研究了其流变特性,此共混物属于假塑性流体,表观粘度随剪切速率和温度的升高而降低,随NBR和增容剂含量的降低而降低。     

丙烯酸酯橡胶与丁腈橡胶并用研究

对丙烯酸酯橡胶（ACM）与丁腈橡胶（NBR）并用胶的物理机构性能及耐热耐油性能进行了测试考察。实验结果表明,m(ACM):m(NBR)≥70:30的并用胶,综合性能比丁腈橡胶及丙烯酸酯橡胶好、成本低,可代替丙烯酸酯橡胶用作耐热耐油密封件胶料。     

间苯二甲腈气相催化氯化反应动力学模型

对间苯二甲腈气相氯化反应过程提出了合理的假设与简化 ,从反应机理出发建立了一个动力学数学模型。     

不等活性AA-BB型缩聚反应动力学的Monte Carlo模拟

采用ＭｏｎｔｅＣａｒｌｏ方法模拟了不等活性的ＡＡ－ＢＢ型缩聚反应的数均分子量随时间演化的动力学行,并在模拟中首次考虑了逆反应,模拟结果与实验结果吻合得很好,从而合理地解释了聚芳醚腈砜合成反应的动力学曲线在反应初蓁后期偏离线性关系的原因。     

国内丁腈橡胶市场分析及对策

分析了国内丁腈橡胶的生产、消费和进出口等情况,旨在找出 国内丁腈橡胶生产及销售的薄弱环节,并提出相应的对策。