UFPR粒子提高胎面胶复合材料抗滑性能的基础研究

发布时间：2018-01-30 11:20

  本文关键词： UFPR 抗滑性能 损耗因子 表面性能　出处：《青岛科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文分别应用超细全硫化粉末羧基丁腈橡胶(UFPCNBR)、超细全硫化粉末丁苯橡胶(DB-50,DB-70)、超细全硫化粉末丁腈橡胶(UFPNBR)四种粒子制备了UFPR/天然橡胶(NR)/丁苯橡胶(SBR)胎面胶复合材料,在研究UFPR粒子胎面胶复合材料硫化性能和物理机械性能的基础上,重点研究了UFPR粒子对胎面胶复合材料的动态力学性能和表面性能的影响,进而优化选择UFPR粒子,制备具有高抗滑、低滚阻的胎面胶复合材料,完善抗滑性能作用机制,并提出了抗滑性能的基本经验理论模型,为高温高速下安全行驶轮胎胎面胶的制备提供了新的研究思路。机械力学性能研究表明,非极性DB-50、DB-70粒子改性胎面胶复合材料的断裂伸长率明显提高,二者的拉伸程度和撕裂强度均可达到20MPa和50N/mm,能够满足胎面胶力学性能的要求。极性UFPCNBR和UFPNBR改性胎面胶的断裂伸长率也明显提高,但拉伸、撕裂强度有一定程度的降低。动态力学性能(DMA)实验结果表明,UFPNBR、DB-50、DB-70粒子能够明显提高胎面胶复合材料在-10～10℃温度范围内的损耗因子(tan8),提高了胎面胶的抗湿滑性能,抗湿滑性能可分别提高31.71%、56.64%、21.43%；UFPCNBR粒子不能够提高胎面胶复合材料的抗湿滑性能。在上述研究的基础上,本文重点研究了4种UFPR粒子胎面胶复合材料的表面性能,发现UFPR粒子能够改善胎面胶的表面性能。其中,DB-50粒子能够明显降低DB-50/NR/SBR复合材料表面的水接触角,且摩擦后胎面胶表面形貌更为粗糙；此外,DB-50粒子还能够提高胎面胶的模量(宏观、微观)。胎面胶的微观粗糙度、润湿能力、宏观模量和微观模量的提高能够降低水膜厚度、破坏水膜,从而提高胎面胶的抗湿滑性能。在前人抗湿滑性能的理论研究基础上,本文充分考虑影响水膜厚度的各种因素,对现有采用损耗因子作为评价抗湿滑性能的单一方式进行补充,提出了抗湿滑性能的简化经验函数表达式：橡胶加工分析仪(RRA)实验结果表明,10%应变条件下,25份UFPCNBR粒子改性胎面胶的tanδ(30℃)增大了13.98%,虽然提高了抗干滑性能,但同时提高了胎面胶的滚动阻力；25份DB-50粒子改性胎面胶的tanδ(30℃)增大了4.66%,而60℃下的tanδ降低了16.18%,既提高了抗干滑性能,又降低了滚动阻力；UFPNBR和DB-70粒子改性胎面胶对抗干滑性和滚动阻力的改善效果不明显。胎面胶复合材料的表面能研究发现,UFPR粒子能够提高胎面胶复合材料的表面能。其中,DB-50粒子改性橡胶的表面能是基体橡胶的6倍左右,增强了橡胶与路面之间的粘附能力,从而可进一步提高胎面胶的抗干滑性能。在前人研究胎面胶的抗滑性能和摩擦理论的基础上,本文指出采用损耗因子和表面性能来评价胎面胶的抗干滑性能的合理性,并结合实验结果和橡胶的摩擦系数公式,提出了抗干滑性能的简化经验函数表达式：
[Abstract]:In this paper, ultrafine fully-vulcanized powder carboxylic acrylonitrile butadiene rubber (UFPCNBRN) and ultrafine fully vulcanized powder butadiene rubber (DB-50 / DB-70) were used respectively. UFPNBR4 particles of ultrafine fully vulcanized powder nitrile butadiene rubber (UFPNBR) were used to prepare UFPR / NRN / SBR tread composites. Based on the study of the vulcanization and physical mechanical properties of UFPR particle tread composites, the effect of UFPR particles on the dynamic mechanical properties and surface properties of tread composites was studied. Then the UFPR particles were optimized to prepare the tread rubber composites with high sliding resistance and low roll resistance. The mechanism of the anti-slide properties was improved and the basic empirical theoretical model of the skid resistance was put forward. It provides a new research idea for the preparation of tread rubber for safe driving tire at high temperature and high speed. The study of mechanical properties shows that non-polar DB-50. The elongation at break of DB-70 particle modified tread composite was improved obviously. The tensile degree and tear strength of the two composites could reach 20MPa and 50Nm / mm. It can meet the requirements of mechanical properties of tread rubber. The elongation at break of the tread modified by polar UFPCNBR and UFPNBR is also obviously increased, but the tensile properties are also improved. The tear strength is reduced to some extent. The dynamic mechanical properties of DMA show that UFPNBR-DB-50. DB-70 particles can obviously improve the loss factor of tread rubber composites in the temperature range of -10 鈩，

本文编号：1476115