共查询到20条相似文献,搜索用时 46 毫秒
1.
阻燃橡胶胶料及制品的开发和应用 总被引:4,自引:0,他引:4
一、前言随着合成橡胶工业的迅速发展,橡胶应用领域不断扩大,许多部门对橡胶制品提出了更高的要求。如建材部门橡胶门窗密封条、橡胶地毯;矿山井下橡胶运输带、胶管、电缆电线护套;家用电器黑白彩色电视机用橡胶零件等。这些橡胶制品均要求阻燃。橡胶制品的阻燃问题越来越受到人们的重视。基于社会对阻燃制品的迫切需要,我们所自1980 相似文献
2.
3.
4.
介绍轨道车辆减振元件用橡胶材料阻燃改性研究进展。为提高阻燃性能而大量添加阻燃剂会严重恶化橡胶基材的物理性能;采用金属氢氧化物/磷系阻燃剂/纳米阻燃剂复配体系的阻燃天然橡胶可在满足EN 45545-2阻燃性能要求的同时保持较好的物理性能;表面涂覆阻燃涂料是橡胶材料阻燃的理想方式,但涂料的疲劳性能及延展性能不足及其与橡胶基材之间的附着力不够等问题有待解决;双层橡胶阻燃方式提供了橡胶材料阻燃的新思路,但需要对两层橡胶之间的共硫化工艺进行深入研究。 相似文献
5.
6.
7.
8.
阻燃橡胶是一种负有特殊使命的功能橡胶,阻燃剂是完成这一使命所需的专用助剂。橡胶阻燃是近年来受人瞩目的领域,阻燃橡胶的应用也日趋广泛。一、橡胶品种的选择大部分橡胶(杂链橡胶除外)的主链是碳氢结构,是可燃物,但有些胶种主链连接有抗燃的卤素原子或基因,在燃料中表现为难燃。根据橡胶燃烧的难易,可分为:不阻燃(氧指数<20),一般阻燃(氧指数20~30)及高阻燃(氧指数>30),如表1所示。硅橡胶主链由硅、氧组成,故赋有阻燃特性,在阻燃领域也有较多应用。表1中,含卤橡胶除氯丁橡胶外,氯磺化聚乙烯(CSM)、氯化聚乙烯(CPE)及氯醇(CO)等都有… 相似文献
9.
EVM橡胶在低烟无卤阻燃船用电缆上的应用 总被引:1,自引:0,他引:1
研究并介绍了Levapren 500HV EVM橡胶用于低烟无卤阻燃船用电缆护套橡胶配方。侧重点放在了阴燃性能的研究。采用该配方生产的成品电缆,经国家电线电缆监督检验中心测试,不但各项指标达到标准要求,就其烟、卤及成束阻燃(A类)等关键性能指标,所测数值与标准相比,具有较大余度。 相似文献
10.
11.
Solid solutions of diphosphates of zinc and copper and of zinc and cobalt were synthesized from mixtures of pure diphosphates at temperatures up to 1000°C. Their X-ray diffractometry patterns varied continuously from one end member to the other. Solid solutions of orthophosphates of composition Zn3−x Cox(PO4 )2, with x = 0.4–1.6, were formed at temperatures up to 950°C; all exhibited the structure of γ-Zn3 (PO4 )2. Solid solutions of orthophosphates of composition Zn3−x Cux (PO4 )2 exhibited more-complex behavior. At 1000°C and copper contents of 20–80 mol%, a phase that is related to Cu3 (PO4 )2, termed here the "ε-phase," predominated. At 850°–950°C and in the region from 20 mol% to ∼33 mol% of copper, the solid solutions (the "η-phase") adopted the structure of graftonite. At 800°–900°C and 10–15 mol% of copper, the solid solutions exhibited a new structure (the "δ-phase"), which we found to be related to the mineral sarcopside. At temperatures 950°C, the solutions that contained 5–15 mol% of copper (the "β-phase") had the structure of β-Zn3 (PO4 )2, whereas at 800°–850°C, solutions with 5 mol% of copper (the "-phase") exhibited the structure of γ-Zn3 (PO4 )2. Attempts to synthesize Cu+ ZnPO4 and Cu+ Cu2+ Zn3 (PO4 )3 were unsuccessful. 相似文献
13.
14.
为了提高油田的生产效率,设计最佳的油气集输处理的工艺流程,更好地完成油气水分离处理的任务。对油气集输工艺技术进行优化,发挥高效油气水分离处理设备的优势,提高油气水处理的质量,保证油气集输工艺顺利实施,获得最佳的油田产量外输。 相似文献
15.
建设创新型国家是我们中华民族的历史责任。“自主创新、重点突破、支撑发展、引领未来”的16字方针应当成为我们未来创新活动的指南。建设创新型国家把自主创新放在首位,并提出了引领未来的高标准要求。钢铁科技创新必须突出重点,抓住创新成果产业化这个关键,支撑起行业和国民经济的发展。 相似文献
16.
17.
18.
相比已经完善丰富的开采和勘探技术,油气的运输以及储存却仍然存在不足之处。我国对能源安全提出更加严格要求的同时,对区域经济的发展规划也有足够重视。因此,保障油气管道的安全则成为了我国能源安全战略的重中之重。在阐释油气管道现阶段在储运安全保障技术发展状况的基础上,分析了现存的问题及解决问题的手段,并指出未来可能使用的目标策略,为今后研究者提供一定程度上的借鉴经验。 相似文献
19.
膜的污染和劣化及其防治对策 总被引:25,自引:0,他引:25
较为系统地介绍了膜污染和劣化的定义和特点,因膜污染和劣化而造成的膜性能变化,以及如何预防、减少或清除膜污染和劣化的一些通用方法。 相似文献
20.
James L. White David G. Salladay David O. Quisenberry Donald L. MacLean 《应用聚合物科学杂志》1972,16(11):2811-2827
Gel permeation chromatographic (GPC) and thin-layer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtaining absolute molecular weight distributions for BR and SBR based upon variations of the Strasbourg Universal Calibration procedure are described. In particular, [η]–M relationships in both the GPC solvent (THF) and in a second solvent (toluene) were used; in addition, results of statistical mechanical calculations for \documentclass{article}\pagestyle{empty}\begin{document}$\overline {s^2 }$\end{document} (based on the assumption of negligible steric hindrance and freely rotating bonds) were applied. An experimental comparison of these methods was carried out, and use of the [η]–M relationships for both solvents was found to give satisfactory results. The predictions of the statistical theory were too low. A detailed study of polymer–solvent–gel interaction in the GPC unit was made through investigation of ternary phase equilibrium in the (polystyrene)–THF–(polymer) system. The polymers studied included BR and SBR with varying styrene contents. Experimental techniques for TLC separations of BR, SBR, and polystyrene according to the composition are described. 相似文献