重载条件下填料体系对胎面橡胶复合材料耐磨性的影响  

Effect of Filler System onWear Resistance of Tread Rubber Composites Under Heavy Load Conditions

作　　者：刘欢欢 庞松 肖佶海 吴友平[1] Huanhuan Liu;Song Pang;Jihai Xiao;Youping Wu(Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《高分子材料科学与工程》2022年第4期103-110,118,共9页Polymer Materials Science & Engineering

摘　　要：重载条件下,胎面胶的力学性能直接影响到飞机轮胎的耐磨性。采用TAS-130轮胎磨耗模拟试验机,设定转速为800 r/min(15 Hz)及保持总填料用量为60 phr,探究了重载条件(>1.5 MPa)下不同炭黑/白炭黑并用比对天然橡胶(NR)/反式聚异戊二烯橡胶(TPI)复合材料耐磨性的影响,并结合硫化胶静、动态性能进行分析。结果表明,随载荷增大和白炭黑用量的增加,胶料的磨耗量逐渐增加;纯炭黑体系的硫化胶耐磨性最好,这主要是由于其高的300%定伸应力和高硬度以及在高载荷下形变小的原因。橡胶加工分析仪测试结果表明,随白炭黑用量增加,硫化胶的“Payne效应”逐渐减弱,损耗因子峰逐渐降低;压缩疲劳生热和屈挠疲劳测试结果表明,与纯炭黑体系相比,炭黑/白炭黑并用比为40/20的硫化胶的动态生热降低了27.5%,出现一级和六级裂纹的疲劳寿命分别提高了287.5%和261.1%。综合来看,硬度和300%定伸应力的降低是导致耐磨性能下降的主要原因。磨屑的红外光谱分析结果表明,硫化胶的磨耗是以机械力作用下的热氧降解磨耗为主。Under heavy load conditions,the mechanical strength of tread rubber directly affects wear performance of aircraft tires.Keeping the total filler amount at 60 phr,the influence of different carbon black/silica ratios on wear resistance of natural rubber(NR)/trans-polyisoprene rubber(TPI)composites under heavy load(>1.5 MPa)was investigate by TAS-130 tire wear simulation tester with a rotational speed of 800 r/min(15 Hz),and the static and dynamic properties of vulcanizates were analyzed.The results show that the abrasion of rubber increases with the increase of the load and amount of silica.The vulcanizate of pure carbon black system exhibits the best wear resistance,which is mainly due to its high stress at 300%and high hardness,the deformation is small under high load.The results of the rubber processing analyzer show that with the increase of the amount of silica,the"Payne effect"of the vulcanizates and peak of the loss factor gradually decrease.The compression fatigue heat generation and flexural fatigue test results show that,compared with pure carbon black system,the dynamic heat generation of the vulcanizate with a carbon black/silica ratio of 40/20 is reduced by 27.5%,and the fatigue life of grade 1 and grade 6 cracks is increased by 287.5%and 261.1%,respectively.In general,the decrease of hardness and stress at 300%is the main reason for the decline of wear resistance.The results of FT-IR of the wear debris show that the wear of the vulcanizates is mainly caused by the thermal oxygen degradation under mechanical force.

关 键 词：重载 炭黑/白炭黑并用比 耐磨性 天然橡胶 

分 类 号：TQ336.1[化学工程—橡胶工业]