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氯丁橡胶/氯磺化聚乙烯共混胶的性能研究 总被引:1,自引:0,他引:1
《世界橡胶工业》2015,(8)
主要研究了氯丁橡胶(CR)与氯磺化聚乙烯(CSM)的共混比对其共混胶的硫化特性、物理性能、耐老化性能及不同填充体系对CR/CSM共混胶物理性能的影响。实验结果表明:随着CSM用量的增加,CR/CSM共混胶的硬度、拉伸强度逐渐增加,撕裂强度和拉断伸长率呈下降趋势;老化后共混胶的拉伸强度和硬度均有提高,共混胶的撕裂强度和拉断伸长率均有降低。当CR与CSM的共混比为60:40时,随着高岭土用量的增加,共混胶的物理性能呈现下降趋势。 相似文献
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将高密度聚乙烯(HDPE)与氯磺化聚乙烯(CSM)共混制备热塑性动态硫化弹性体(TPV),并采用高密度聚乙烯接枝马来酸酐(HDPE-g-MAH)作为相容剂来改善HDPE与CSM的相容性,研究HDPE/CSM共混比和HDPE-g-MAH用量对TPV性能的影响。结果表明:随着CSM用量的增大,TPV的力学性能先降低后提高,玻璃化温度(Tg)升高,阻燃性能改善;添加HDPE-g-MAH后,TPV的力学性能提高,Tg降低,HDPE与CSM的相容性较好,CSM粒子在体系中分散更均匀,TPV的拉伸断面更平整。 相似文献
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研究氯磺化聚乙烯(CSM)和氯化聚乙烯(CM)对三元乙丙橡胶(EPDM)物理性能及耐热老化性能的影响。结果表明:CSM具有独特的氯磺酰基,添加CSM的EPDM胶料定伸应力与拉伸强度增大,耐热老化性能明显提高;添加CM的EPDM胶料耐热老化性能无明显改善;添加气固法CSM3570与溶剂法CSMTS530的EPDM胶料耐热老化性能相近;气固法CSM3570用量为5份时,EPDM胶料耐热老化性能较好,性价比较高。 相似文献
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橡胶型氯化聚乙烯的并用 总被引:1,自引:0,他引:1
研究了不同橡胶型氯化聚乙烯(CM)并用时硫化体系及条件、增强体系和增塑剂对并用胶硫化行为及性能的影响.结果表明,将不同的CM并用改善了硫脲-硫黄硫化体系的硫化行为,出现了硫化平坦区.硫化温度为160℃、硫化时间为50 min时,CM并用硫化胶的拉伸强度达到14.8 MPa;将质量比为50/50的炭黑N 375与N 774用于增强CM并用胶时,其硫化胶的永久变形最小;增塑剂有助于改善CM并用硫化胶的弹性及硬度,但其用量不宜过多,以30份(质量)为好;CM并用胶的各项性能指标均可以满足制备大型橡胶制品的要求. 相似文献
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将氯化聚乙烯弹性体(CM)与笼型八乙烯基倍半硅氧烷(OV-POSS)进行共混,制备POSS改性CM胶料;采用过氧化二异丙苯(DCP)为硫化剂,三烯丙基异氰脲酸酯(TAIC)为助硫化剂,利用无转子硫化仪对该改性胶料的硫化行为及硫化动力学进行研究。利用动态力学热分析仪(DMA)以及热机械分析仪(TMA)对硫化胶的力学性能、热稳定性能,及其动、静态热机械性能进行了研究。结果表明:随着OV-POSS用量的增加,改性胶料的硫化反应活化能逐步降低,硫化速度加快,硫化胶的拉伸强度、玻璃化温度(Tg)相应提高。表明OV-POSS对CM的硫化具有促进作用,加入OV-POSS,可改善其硫化胶的力学性能以及提高热稳定性能。 相似文献
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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
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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
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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
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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
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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
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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