共查询到18条相似文献,搜索用时 156 毫秒
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研究了间苯二酚—80在于午线轮胎带束层胶中的应用情况。结果表明,在钢丝胶料中使用预分散的间苯二酚—80有效地提高了间苯二酚在橡胶中的分散效果,减小了混炼时间苯二酚因高温升华及早期反应造成的胶料物理性能下降和对环境的污染,对提高胶料的性能和稳定生产工艺有较大的好处。 相似文献
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研究改性间苯二酚-甲醛树脂RF90在轿车子午线轮胎带束层胶中的应用。结果表明:用改性间苯二酚-甲醛树脂RF90等量代替间苯二酚,胶料的门尼粘度略小,H抽出力增大,耐热老化性能提高;胶料在混炼过程中无烟雾和刺激性气味,表面光滑,在压延过程中与钢丝帘线粘合性能良好;成品轮胎的高速性能和耐久性能良好。 相似文献
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间苯二酚作为次甲基接受体,广泛用于全钢载重子午胎的钢丝帘布腔中,以增强胶料与钢丝的粘合。然而,纯态间苯二酚难以分散,且在高温炼胶时产生浓裂刺激性烟雾。为了克服这种缺点,可用预分散间苯二酚代替纯态间苯二酚,为此进行了试验。1.试验材料与配方预分散间苯二酚为灰米色丸粒,用丁苯橡胶作载体,其有效成分占SO%,莱茵化学(青岛)有限公司出品。纯态间苯二酚为晶片状,南京化工厂产品{试验配方:天然橡胶(SMRZO)10O;硫化剂7;防老剂2.5;炭黑55;间苯二酚(按有效成分计)1.5;氧化锌8;粘合剂RA5;其它2.5。2试验… 相似文献
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研究新型间苯二酚-甲醛树脂AR50在全钢载重子午线轮胎带束层中的应用。结果表明,新型间苯二酚-甲醛树脂AR50等量替代间苯二酚后胶料的t10延长约16%,有效提高了操作安全性,且有利于胶料中游离硫与钢丝帘线镀层中铜的界面粘合;硫化胶的定伸应力略增大,拉伸强度和拉断伸长率有所减小;耐热空气老化性能和耐疲劳性能更佳;粘合胶与钢丝帘线的初始粘合力提高了约7%,热氧老化后、湿热老化后和动态老化后的抽出力保持率均提高了约2%,盐水老化后的抽出力保持率相当。且加入间苯二酚-甲醛树脂AR50的胶料在混炼过程中,基本消除了烟雾和刺激性气味,大大改善了操作员的环境。 相似文献
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Investigation of the effects of adhesion promoters on the adhesion properties of rubber/steel cord by a new testing technique 下载免费PDF全文
The effects of adhesion promoters, cobalt decanoate and PN759 (modified resorcinol) on the static and dynamic adhesion properties of rubber/steel cord in a carcass recipe are examined. A new testing method with special rubber/steel cord specimens was developed. It was found that cobalt decanoate could improve the static adhesion and favored the dynamic adhesion of rubber/steel cord so that adhesive failure mainly occurred in rubber phase. A resorcinol‐formaldehyde‐silica promoting system was deleterious to adhesion stability, but improved initial adhesion strength. PN759 improved the dynamic mechanical properties compared with resorcinol for the carcass vulcanizates at strains less than 10%. PN759 instead of resorcinol slightly improved the static and dynamic adhesion and the probability that adhesion failure occurred in the interphase was similar to that occurring in the rubber phase. The dynamic “pull‐out forces” for samples with 1.0 phr cobalt decanoate first increased and then decreased with the increase in the number of fatigue cycles and reached a maximum at 100,000 fatigue cycles. The covered rubber on the “pulled‐out” cord after fatigue appeared to form a screw thread form and the greater pull‐out force corresponded to more uniform and narrower screw threads. SEM images indicated that un‐dispersed filler agglomerates could be the initiating factor for adhesive failure. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 39460. 相似文献
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Nylon 6,6 cord is used as reinforcement in rubber products (e.g., tires, hoses, and belts). The problem of bonding rubber to textile cords is due to the big difference between the surface properties. To obtain a durable reinforced rubber product, it is necessary to produce a bond strong enough to resist the different conditions, for example, high temperature, cyclic tension, compression loads, and shock, depending on the applied rubber product. Choosing a suitable adhesive system and addition of an adhesion promoter into the rubber compound are factors which play a very important role. Many other factors are known to affect the bond strength obtained with resorcinol formaldehyde latex (RFL) adhesives. For example, method of RFL preparation, its composition, amount of adhesive applied to cords, its distribution on the cord, heat treatment conditions after dipping, method of storing dipped cord, composition of rubber compound, and vulcanization conditions are factors affecting the cord-to-rubber bonding. The scope of this research is to study the effect of the heat treatment conditions (temperature and time) after dipping and the effect of the presence of an adhesion promoter in the rubber compound on the adhesion between nylon 6,6 cord and chloroprene rubber. On studying the static adhesion (H-pull-out test) for this system, the test results showed that RFL dipping solution increases adhesion by about a factor of 2, while the heat treatment conditions have only a moderate effect. The resorcinol/hexamethylene tetramine based adhesion promoting material in the rubber compound gave a significant improvement, with both undipped and dipped cords. 相似文献