短纤维-橡胶复合材料的发展前景

短纤维-橡胶复合材料的应用研究始于20世纪70年代。1972年，美国孟山都公司发表了第一个专利“纤维素短纤维补强弹性体”，并成功地将其应用于中、低压胶管等制品中。目前，短纤维的应用范围已经覆盖了几乎所有的橡胶制品，包括轮胎、胶管、胶带、胶鞋、密封件以及坦克履带挂胶等。最近几年，短纤维在轮胎中的应用研究尤为活跃，已经应用到各种不同类型的轮胎，包括工程越野轮胎、载重轮胎、无销钉防滑轮胎以及高性能子午线轮胎等，其增强部位也几乎包括了轮胎的所有部位。     

天然短纤维增强橡胶复合材料的研究进展

介绍了短纤维的预处理方法,总结了短纤维在橡胶中的混合、分散及取向状态,综述了短纤维-橡胶复合材料在轮胎、胶带和胶管中的应用进展,并提出了复合材料的研究方向.     

聚酯短纤维/橡胶复合材料及其在轮胎中的应用概况

简介聚酯短纤维/橡胶复合材料(SFRC)在制备过程中聚酯短纤维在橡胶基体中的混合与分散、聚酯短纤维的取向方法及短纤维用量对SFRC性能的影响,阐述SFRC在轮胎中的应用进展。     

短纤维增强橡胶复合材料在轮胎中应用的研究概况

本文介绍了短纤维增强橡胶复合材料（SFRC）的性能以及在轮胎中应用的理论研究概况,并重点介绍短纤维在胎面胶、带束层边部胶、胎侧胶、气密层胶等轮胎各部件中的使用情况及影响,指出我国在短纤维应用于轮胎中存在的一些问题和发展方向。     

短纤维在轮胎中的应用

简介短纤维-橡胶复合材料的一些特点,重点论述短纤维在轮胎中应用的依据及其在工程越野轮胎、载重轮胎、无销钉轮胎和高性能子午线轮胎中的应用开发情况和在实际应用中存在的一些问题,指出我国开展这一方面工作的必要性。     

短纤维补强橡胶在轮胎中的应用(一)

本文简单介绍了短纤维的种类、特点和优缺点,重点论述了短纤维补强橡胶的性能及其在轮胎中的应用,提出了有待解决的问题。     

短纤维胶料的疲劳耐久性和粘弹滞后性能

由短纤维和橡胶组合构成的材料(短纤维胶料或称 SERC),如同由连续帘布和橡胶构成的复合材料那样,其性能得到改善。例如,这些复合材料的刚性要比纯橡胶的高。对于短纤维,很多年来人们已对它作了深入的研究。将短纤维加到橡胶中要比在连续帘布上擦胶容易。因此,可望轮胎公司会在充气轮胎的结构中增加对短纤维胶料的使用。但是,目前轮胎制造厂还不曾大量使用短纤维胶料。其原因之一是,短纤维在作为橡胶的增强材料为产品提供某些理想性能的同时,还使周期性应变过程中的粘弹滞后现象(VH)加剧,耐疲劳性能     

定向短纤维橡胶复合轮胎和短纤维子午线农业轮胎分获实用新型专利权

近日,由青岛橡胶工业研究所研制的定向短纤维橡胶复合轮胎和短纤维子午线农业轮胎分别获得国家知识产权局实用新型专利权,专利号分别为ＺＬ98252050.6和ＺＬ00200529.8。这两项专利的最大特点是将定向短纤维橡胶复合材料应用于轮胎胎体,这无疑是轮胎结构材料调整的一大突破。其应用原理是,以不连续的化学纤维短纤维为骨架材料,以ＮＲ/ＳＲ并用橡胶为基质,将经特种助剂处理过的短纤维在基质中按轮胎的力学性能要求有规排列,定位交联后得到了强有力的有机统一体,可有效解决轮胎的肩空、胎体脱层、磨胎冠等问题,并能有效地降低轮胎内摩擦生热和…     

短纤维补强橡胶在轮胎中的应用

随着科学技术的飞速发展,短纤维逐渐被应用在各类橡胶物品中,例如汽车轮胎、生活日用品等,尤其是近几年,轮胎中短纤维的应用非常活跃,几乎已经到了各种型号的轮胎都有它的身影。     

短纤维—橡胶复合材料的开发应用

本文综述了近年来作为特殊性能材料的短纤维—橡胶复合材料在轮胎、胶管、胶带、胶鞋、密封件、坦克履带垫、减震件及其它方面的应用情况,以及国内外的发展近况,并对我国短纤维—橡胶复合材料的开发和研究提出了具体建议。     

短纤维用量对短纤维-橡胶复合材料混炼质量的影响

利用六棱同步变间隙转子进行聚酯短纤维用量实验。实验过程中通过添加不同份数的短纤维,对比分析了短纤维用量对短纤维-橡胶复合材料的混炼过程及混炼胶质量的影响。结果表明,当短纤维添加份数为3份时,混炼胶达到了最佳的物理机械性能。     

六棱同步变间隙转子混炼性能研究

研制适用于短纤维-橡胶复合材料混炼的六棱同步变间隙转子,在分析聚酯短纤维用量对胶料性能及混炼性能影响的基础上,对比六棱同步变间隙转子与其它类型转子的混炼效果。结果表明,随着聚酯短纤维用量的增大,混炼过程中消耗的最大功率和排胶温度升高,硫化胶的300%定伸应力、拉伸强度、拉断伸长率和撕裂强度均随短纤维用量的增大而先提高后下降,聚酯短纤维最佳用量为3份;六棱同步变间隙转子短纤维-橡胶复合材料混炼性能最佳。     

转子构型对短纤维－橡胶复合材料混炼性能的影响

短纤维－橡胶复合材料有特殊的混炼要求,为满足其特殊要求,研发并试制了新型六棱同步转子,并将其与四棱同步转子及原六棱同步转子进行了对比研究。实验结果表明,新型六棱同步转子的混炼性能优于四棱同步转子和原六棱同步转子。     

Interfacial adhesion in sisal fiber/SBR composites: an investigation by the restricted equilibrium swelling technique

Short sisal fiber-reinforced styrene butadiene rubber (SBR) composites were prepared and characterized by the restricted solvent swelling technique. The solvent swelling characteristics of SBR composites containing untreated and bonding agent-added mixes were investigated in a series of aromatic solvents, such as benzene, toluene, and xylene. The diffusion experiments were conducted by the sorption gravimetric method. The adhesion between the rubber and short sisal fibers was evaluated from the restricted equilibrium swelling measurements. The anisotropy of swelling of the composite was confirmed by this study. The effect of fiber orientation in controlling the anisotropy of restricted swelling was also demonstrated. As the fiber content increased, the solvent uptake decreased, due to the increased hindrance and good fiber-rubber interactions. Bonding agent-added mixes showed enhanced restriction to swelling, due to the strong interfacial adhesion. The bonding system containing hexa-resorcinol in the mix produces an in-situ resin, which binds the fiber and the rubber matrix firmly. In addition, as the penetrant size increases from benzene to xylene, the uptake decreases. The swelling index values of the composites support this observation. Due to the improved adhesion between the short sisal fiber and SBR, the ratio of the volume fraction of rubber in the dry composite sample to the swollen sample (V _T) decreases. The extent of fiber orientation of the composites was also analysed from the restricted swelling method. SEM studies of the composite revealed the orientation of short fibers. The sorption data support the Fickian diffusion trend, which is typical in the case of cross-linked rubbers.     

Effect of short polyethylene terephthalate fibers on properties of ethylene-propylene diene rubber composites

The alteration in some properties of electron beam (EB) cured ethylene-propylene diene rubber (EPDM) reinforced by polyethylene terephthalate (PET) fiber was investigated in this study. Bonding system Resorcinol/Hexamethylenetetramine/Silica (RHS) was used to enhance the fiber/EPDM adhesion and to maintain optimum composite strength properties. Mechanical properties of composites namely; tensile strength, hardness and modulus at 100 % elongation have been enhanced by adding PET fibers and increasing irradiation dose. Moreover, the effect of fiber loading and irradiation dose on the soluble fraction behavior of the composite in benzene was also investigated. The soluble fraction of the composites decreased with increasing the fiber loading and irradiation dose. The extent of fiber alignment and strength of fiber-rubber interface adhesion were analyzed from the anisotropic swelling measurements. In addition, thermal stability of the composites was increased. Besides, the mechanical properties like tensile strength and stiffness were improved by thermal ageing. Scanning electron microscopy (SEM) for the fractured surfaces and Wide- angle X- ray diffraction (WAXD) of the investigated samples confirmed that the adhesion occurred between fibers and EPDM.     

Stress relaxation in short sisal-fiber-reinforced natural rubber composites

Stress relaxation behavior of chemically treated short sisal fiber-reinforced natural rubber composite was studied. The effect of bonding agent, strain level, fiber loading, fiber orientation, and temperature has been studied in detail. The existence of a single relaxation pattern in the unfilled stock and a two-stage relaxation mechanism for the fiber-filled composite is reported. The relaxation process is influenced by the bonding agent, which indicated that the process involved fiber-rubber interface. The rate of stress relaxation increased with fiber loading, whereas it decreased with aging. © 1994 John Wiley & Sons, Inc.     

Fiber properties required for tires

Contrary to what the appearances would suggest, a pneumatic tire is basically an engineered textile object rather than a rubber one. The functional characteristics and performance of tires are chiefly determined by the properties of the textile fibers and by the way in which they are disposed in the tire structure. The specific roles of some of these properties (e.g., modulus, tensile strength, fatigue resistance, hysteresis) will be related to tire performance. Different tire constructions require a different balance of textile properties for optimum performance. Belted tires, and especially radial ply tires, present a different set of requirements for optimum textile fiber performance in tires. The nature of the differences are discussed.     

短纤维-橡胶复合材料的混炼工艺

研究了转子转速和短纤维用量对短纤维-橡胶复合材料混炼过程及硫化胶质量的影响。结果表明,随着转子转速和短纤维用量的增加,混炼过程中消耗的最大功率、单位能耗等增加,当转子转速为70r/min,聚酯短纤维用量为3份时,硫化胶的拉伸强度、撕裂强度等物理机械性能出现最佳值。     

Fracture of an epoxy polymer containing recycled elastomeric particles

The fracture behavior of elastomer-modified epoxy was investigated using compact-tension geometry. The elastomeric modifiers included a liquid carboxyl-terminated butadiene acrylonitrile and solid rubber particles of different sizes which were obtained from recycled automobile tires. When used with solid rubber alone, no significant improvement in the fracture toughness was observed. However, when used in combination with the liquid rubber modifier, it was observed that the fracture toughness of these hybrid epoxies was higher than that of those toughened with liquid rubber alone. This synergistic effect is explained in terms of crack deflection and localized shear yielding. Furthermore, we observed a slight improvement in the fracture toughness as the size of the solid rubber particles increased. Although using a combination of both reactive rubber liquids and solid rubber particles as toughening agents had been investigated previously, in this study, the solid rubber particles used were from recycled rubber tires. Therefore, we have clearly demonstrated an application of producing high-quality engineering epoxy systems using toughening modifiers that are relatively low in cost and created higher-value products for recycled solid rubber. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 271–277, 1997