注射氟橡胶胶料的研究

本文介绍了两种不同门尼粘度很橡胶2601与2605的共用，得到了各项物理机械性能符合GB7040－86，且工艺可行，产品的硫化合格率大于90％的注射胶料。     

Synthesis and characterization of fluorine‐containing liquid crystalline polysiloxanes bearing cholesteryl cinnamate mesogens and trifluoromethyl‐substituted mesogens

Several novel side‐chain liquid crystalline (LC) polysiloxanes bearing cholesteryl cinnamate mesogens and trifluoromethyl‐substituted mesogens were synthesized by a one‐step hydrosilylation reaction with poly(methylhydrogeno)siloxane, a cholesteric LC monomer cholesteryl 3‐(4‐allyloxy‐phenyl)‐acryloate and a fluoro‐containing LC monomer 4‐[2‐(3‐trifluoromethyl‐phenoxy)‐acetoxy]‐phenyl 4‐allyloxy‐benzoate. The chemical structures and LC properties of the monomers and polymers were characterized by use of various experimental techniques, such as FTIR, ¹H‐NMR, ¹³C‐NMR, TGA, DSC, POM, and XRD. The temperatures at which 5% weight loss occurred were greater than 300°C for all the polymers, and the residue weight near 600°C increased slightly with increase of the trifluoromethyl‐substituted mesogens in the fluorinated polymer systems. The samples containing mainly cholesteryl cinnamate mesogens showed chiral nematic phase when they were heated and cooled, but the samples containing more trifluoromethyl‐substituted mesogens exhibited chiral smectic A mesophase. The glass transition temperature of the series of polymers increased slightly with increase of trifluoromethyl‐substituted mesogens in the polymer systems, but mesophase–isotropic phase transition temperature did not change greatly. In XRD curves, the intensity of sharp reflections at low angle increased with increase of trifluoromethyl‐substituted mesogens in the fluorinated polymers systems, indicating that the smectic order derived from trifluoromethyl‐substituted mesogens should be strengthened. These results should be due to the fluorophobic effect between trifluoromethyl‐substituted mesogens and the polymer matrix. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

几种耐油橡胶材料的γ辐射效应研究

研究了氟橡胶(FPM)、丁腈橡胶(NBR)和氢化丁腈橡胶(HNBR)3种耐油密封材料的力学性能和耐油性能在不同剂量γ射线作用下的变化,结果表明,在0～200kGy辐射吸收剂量范围内,FPM、NBR和HN-BR的硬度、定伸应力及拉伸强度增大,拉断伸长率降低;FPM和HNBR无论辐照与否,均具有优异的耐热和耐油性能;NBR无法在150℃长期工作。本研究所得试验数据,对优选在射线辐射环境中使用的橡胶密封材料具有实际意义。     

含氟复鞣剂研究进展

含氟复鞣剂可以赋予皮革良好的手感、优异的透气性、抗水抗油性、抗污性等性能。阐述了合成含氟复鞣剂用含氟单体和非氟共聚单体的选择及其合成工艺 ,介绍了含氟复鞣剂的研究进展 ,指出含氟复鞣剂今后将会向着高质量、多功能化方向发展     

国家体育场钢结构防腐工程用氟碳漆的研制

介绍了国家体育场钢结构防腐工程用氟碳涂料体系的特点、性能检测及不同氟树脂的差异。     

对氟苯酚的合成研究

通过对对氟苯酚几种合成方法的比较，选择最佳合成方法，并对其工艺流程进行介绍。     

Improved determination of D-glucosamine hydrochloride in health foods by HPLC using 7-fluoro-4-nitrobenzo-2-oxa-l,3-diazole as a derivative

Abstract: This article presents an improved method to detect d ‐glucosamine hydrochloride in health foods. A simple precolumn derivatization procedure with 7‐flouro‐4‐nitrobenzo‐2‐oxa‐1,3‐diazole (NBD‐F) reagent was employed. The separation of the derivatized d ‐glucosamine hydrochloride (NBD‐d ‐glucosamine hydrochloride) was performed using a mobile phase consisting of acetonitrile, potassium dihydrogen phosphate (0.01 mol/L), and trifluoroacetic acid (350:649.74:0.26, volume ratio) at a flow rate of 1.0 mL/min with the column temperature 35 °C. Under the optimum chromatographic conditions, the peak area of NBD‐d ‐glucosamine hydrochloride compared with its absolute value of the peak area of NBD‐d ‐glucosamine hydrochloride in a standard solution concentration range from 1.0 to 500.0 mg/L showed a good linear calibration (R = 0.9999). Recoveries, at spiked concentrations of 10.0, 40.0, and 500.0 mg/L, varied between 97.2% and 102.6% with relative standard deviations ranging from 0.4% to 1.5%. The present method provides sufficient sensitivity as reflected by the values of limit of detection (LOD) and limit of quantification (LOQ). LOD was determined from the signal‐to‐noise ratios (S/N) of NBD‐d ‐glucosamine hydrochloride peak of at least 3 in the recovery test at 0.02 mg/L, and the estimated LOQ was 0.06 mg/L (S/N = 10). The proposed method was successfully applicable to detect d ‐glucosamine hydrochloride in health foods and drugs containing a variety of complex materials.     

二元乙丙橡胶与四丙氟橡胶的并用研究

将二元乙丙橡胶与四丙氟橡胶并用采用过氧化二异丙苯／三烯丙基异氰脲酸酯作为共硫化体系，测出了不同并用比硫化胶的一些性能，结果表明，并用胶所选用的共硫化体系是成功的，并有和胶性能优良。     

新试剂meso—四（3—氟—4—磺基苯）卟啉光度法测定痕量镉的研究

研究了碱性介质中新试剂ｍｅｓｏ－四（３－氟－４磺基苯）卟啉（ｍ－ＦＴＰＰＳ４）与Ｃｄ（Ⅱ）的显色反应条件。不加任何辅助试剂,沸水浴中加热２０ｍｉｎ,ｍ－ＦＴＰＰＳ４与Ｃｄ（Ⅱ）形成灵敏度较高的１１配合物,表观摩尔吸光系数为３．３２×１０５Ｌｍｏｌ－１ｃｍ－１。应用于天然水中痕量Ｃｄ（Ⅱ）的测定,结果满意。     

EPDM/氟橡胶的动态硫化

研究了 Ｅ Ｐ Ｄ Ｍ 硫化体系、硫化剂叔丁基苯酚甲醛树脂（２４０２ 树脂） 用量以及动态硫化时间对 Ｅ Ｐ Ｄ Ｍ／氟橡胶共混物物理性能的影响。结果表明,当２４０２ 树脂用量超过３０ 份时, Ｅ Ｐ Ｄ Ｍ 的硫化程度和动态硫化共混物的力学性能不再变化;动态硫化时间对共混物物理性能的影响不明显。