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丁基橡胶是由异丁烯和少量异戊二烯合成的共聚物。引入异戊二烯是为硫黄和其它硫化剂硫化橡胶时,能有反应所需的双键。丁基橡胶的硫化胶具有低透气性和高减震性.而且对于热、臭氧和化学药品具有良好的抗耐性。与一般的丁基橡胶相比,卤化改性的丁基橡胶,无论是氯化丁基橡胶还是溴化丁基橡胶,其硫化反应速度和交联灵活性都会有大幅度的提高,且与通用橡胶有良好的相容性,粘合性能也能得以改善。丁基橡胶.特别是卤化丁基橡胶的优异性能和多方面的适应性.大大地拓展了该胶种在轮胎和非轮胎制品中的应用范围:轮胎内胎和气密层、轮胎硫化胶囊和水胎、医用橡胶密封、化工设备衬里、防护服装和防护用品、空调器胶管、管道缠绕带、汽车车身支座缓冲胶垫和缓冲器、电容器密封、模压制品和耐热输送带。本文仅限于讨论丁基橡胶和卤化丁基橡胶在非轮胎制品中的应用。 相似文献
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丁基橡胶发展现状及市场分析 总被引:3,自引:0,他引:3
本文介绍了丁基橡胶和卤化丁基橡胶国内外主要生产厂家及生产方法。对丁基橡胶市场、需求、应用情况进行分析,并对国内的市场前景进行了预测。 相似文献
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介绍了国内外多家公司丁基橡胶(包括卤化丁基橡胶)的生产和技术现状以及产能扩充情况,分析了国内丁基橡胶的市场环境,展望了丁基橡胶的发展前景。 相似文献
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With an aim to probe some of the safe and commercially available nonsulfur chemicals as simulants of sulfur mustard for testing of protective materials, the sorption of bis(2‐chloroethyl) ether (2‐CEE), 1,6‐dichlorohexane, bis(4‐chlorobutyl) ether, n‐octane (OCT), dimethyl methylphosphonate, and ethylene glycol through butyl rubber (IIR) and polyisoprene (PI) rubber was studied at 30 ± 2°C using gravimetric method. Among these compounds, sorption of OCT was maximum while bis(4‐chlorobutyl) ether was sorbed least. The sorption of dimethyl methylphosphonate was intermediate between 2‐CEE and 1,6‐dichlorohexane. With the exception of OCT/IIR, OCT/PI, and 2‐CEE/PI, all other simulant/elastomer systems showed non‐Fickian behavior, implying the potential of OCT as a model compound. The diffusivity of OCT was investigated in IIR and PI; the diffusion coefficient values for OCT/IIR and OCT/PI systems differed by one order of magnitude, being 6.95 × 10?15 m2/s and 3.74 × 10?14 m2/s, respectively, indicating the relative impermeability of IIR. The magnitude and dynamics of sorption in OCT/IIR as a function of its concentration and the amount of filler were further studied using the automated gravimetric analyzer. Incorporation of carbon black in IIR further reduced the extent of sorption, thereby implying an improvement in barrier performance. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1801–1806, 2007 相似文献
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将新型旋转填充床反应器(RPB)应用于阳离子聚合制备丁基橡胶(IIR)过程。实验初步考察了旋转填充床转子转速(N)和聚合温度(Tp)等工艺参数对聚合产物IIR分子量和分子量分布的影响规律。研究结果表明:在实验条件下,当N=1200 r·min-1、Tp=-100℃时,采用超重力法新工艺制备的IIR的数均分子量达到2.89×105,分子量分布指数达到1.99。同时,物料停留时间小于1 s (现工艺30~60min),单位设备体积的生产效率提高了2~3个数量级。随着N的增大和Tp的降低,聚合产物IIR的分子量升高,而分子量分布变化不大。 相似文献
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Antonio C. Rodrigo Karthik Vikram Siva Shanmugan Ralph A. Whitney J. Scott Parent 《加拿大化工杂志》2018,96(1):83-90
The development of new peroxide‐curable poly(isobutylene‐co‐isoprene) (IIR) elastomers is described, wherein pendant oligomerizable C=C groups are introduced in combination with a range of serviceable functional groups. Ring‐opening of itaconic anhydride with functional alcohols or amines, followed by esterification of the resulting acids with brominated IIR, yield macromonomers that crosslink efficiently under the action of dicumyl peroxide alone. More importantly, the additional graft functionality improves the physical and chemical properties of the resulting thermosets. The introduction of fluorocarbon functionality is shown to lower surface energy and improve the material's extrusion characteristics, and trialkoxysilane functionality is used to improve filler dispersion within silica‐reinforced composites. This strategy is extended to prepare thermosets bearing polymer‐bound phenolic antioxidant. Details of macromonomer production are followed by demonstrations of their utility as engineering materials. 相似文献
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本文主要研究了炭黑N330、N660和N990对丁基橡胶(IIR)硫化动力学的影响。研究表明,用三种不同炭黑填充的IIR其硫化反应均包含n=1级反应和n≠1级反应两个阶段。当n=1级反应时,反应速率常数K1均随着温度的升高而增大;当n≠1级反应时,反应速率常数K2则随着温度的升高而减小。同时,在硫化反应过程中活化能Ea随着炭黑粒径的增大而增大。 相似文献
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