氢化丁腈橡胶研究进展

综述了氢化丁腈橡胶的制备方法、种类、性能特点及其在工业中的应用。     

互感器油中非故障引起高含量甲烷的原因探讨

针对互感器油中出现甲烷单一气体含量增加导致总烃超标的现象,通过分析互感器油中产生高含量甲烷的原因,提出了互感器油中存在某种芳烃加氢脱甲基生成甲烷的化学反应的新观点。     

新型覆铜箔玻纤布增强聚芳醚腈酮层压板

制备了玻纤布增强含二氮杂萘酮聚芳醚腈(PPENK)覆铜层压板,研究了PPENK树脂含量对覆铜层压板弯曲强度、剥离强度和吸水率的影响,以及偶联剂种类和含量对覆铜层压板弯曲强度和剥离强度的影响,并对覆铜层压板的介电性能、耐锡焊性、阻燃性等进行了测试。结果表明:选用KH-560偶联剂处理玻纤布、KH-550处理铜箔,当PPENK树脂含量为55%时,PPENK覆铜层压板的综合性能最优,在2 GHz下其介电常数为3.6,tanδ为0.002 2,在290℃下耐锡焊性超过120 s,剥离强度为1.6 N/mm。     

PVC树脂的共混改性

分析了PVC共混改性的基本原理及特点,介绍了ABS、MBS、CPE、ACR、EVA等PVC树脂共混改性剂的主要牌号、改性效果及应用范围。     

丁腈橡胶的发展现状与应用研究进展

综述了国内丁腈橡胶(NBR)的生产能力、产量与市场现状,分析了其国内市场的走向,从国内NBR生产工艺改进、新产品开发和特性化改性及国外丁腈橡胶信息传输应用和氢化丁腈橡胶聚合材料等几个方面介绍了国内外NBR生产技术的最新进展,并提出了我国NBR市场及技术的发展建议.     

粉末NBR和交联剂在PVC／HDPE中的增容－交联作用

用抽提、示差扫描量热仪、扫描电镜和拉伸试验等方法，研究了粉末丁睛橡胶（Ｐ－ＮＢＲ）与以过氧化二异丙苯、三烯丙基异氰尿酸酯和ＭｇＯ组成的交联体系对ＰＶＣ／ＨＤＰＥ（５０／５０）共混物的增容－交联协同作用。单独加交联剂时主要发生ＨＤＰＥ的自交联，并使共混物形成半互穿网络结构，从而提高其力学性能；如再加入Ｐ－ＮＢＲ，则可明显促进两组分的相互分散，使交联剂聚集在两相的界面，ＰＶＣ和ＨＤＰＥ间产生大量互交联，从而显著提高共混物的力学性能。     

Synthesis,structural characterization and properties of novel functional poly(ether imide)/titania nanocomposite thin films

In this study, the synthesis, morphology, and thermal properties of new poly(ether imide)/titania nanohybrid films were investigated. The novel diamine containing functional nitrile groups was prepared in two steps by the nucleophilic substitution reaction and it was fully characterized by different techniques. Reaction of this diamine with pyromellitic dianhydride and 4-aminobenzoic acid gave poly(ether imide) with carboxylic acid end groups. This acid functionalized poly(ether imide) was condense with different amount of TiO₂ nanoparticles to provide organic-inorganic bonding, and the flexible films of these hybrid were prepared. The obtained materials were characterized by Fourier transform-infrared spectroscopy, thermogravimetry analysis (TGA), differential scanning calorimetry, X-ray powder diffraction, UV–Vis spectroscopy, field emission-scanning electron microscopy, and transmission electron microscopy (TEM) techniques. TEM of the nanohybrid films with 12% of TiO₂ contents confirms well dispersion of nanoparticles in the polymer matrix. TGA data indicated that the thermal behavior of the hybrid materials was increased with an increasing the content of TiO₂ nanoparticles. The tensile stress–strain of the hybrids was investigated and the resulting nanocomposites showed good mechanical properties. The permeability and selectivity of the PEI/TiO₂ membranes as a function of the titania weight percentage were study and the results indicated that the permeabilities of CO₂ and N₂ increase with increasing the titania content.     

基于ABS/废旧NBR胶粉热塑性弹性体的制备及性能

采用熔融共混法制备了丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)/废旧NBR胶粉(WNBRP)复合体系,以氯化聚乙烯(CPE)为增容剂改善其界面相容性,研究了CPE用量对其力学性能和微观结构的影响。结果表明,CPE可显著改善ABS/WNBRP复合体系的综合性能,且CPE含量为18份时,综合力学性能最佳;基体中CPE的存在,一方面可以增强ABS与WNBRP的界面相容性,另一方面可以提高基体ABS的塑性变形能力;FE-SEM研究表明,与ABS/WNBRP复合体系相比,增容TPE的断面形貌较为平整,界面结合较好,力学性能提升显著。     

Novel poly(aryl ether nitrile ketone) foams and the influence of copolymer structure on the foaming result

Novel poly(aryl ether nitrile ketone) foams were prepared through the batch foaming method with supercritical CO₂ as the blowing agent. Both temperature‐induced and pressure‐induced foaming methods were conducted to examine the influence of nitrile groups on the foaming result. The results indicated that nitrile groups influenced the foaming result by affecting both the viscoelasticity and CO₂ absorption of the polymers. In addition, the CO₂ solubility of the polymers increased with increasing CN content presumably because of the Lewis acid–base nature of the interaction between the CO₂ molecules and the nitrile groups. The cell growth process was assessed by analyzing the influence of foaming temperature and foaming time on the cell morphology. Nanocellular foams with a minimum size of 30–50 nm were achieved by the temperature‐induced foaming method. Moreover, highly expanded foams with a maximum expansion ratio of 23.6 were obtained by the pressure‐induced foaming method. © 2018 Society of Chemical Industry     

高级脂肪腈合成工艺技术进展

介绍了目前高级脂肪腈合成工艺技术路线,简述了国内脂肪酸氨化脱水制腈工艺技术研究及开发进展情况,并对发展国内脂肪腈/脂肪胺生产提出了建议。