摘要
天然橡胶因其表面非极性、低表面能及弱边界层效应,导致其与胶粘剂界面结合力不足,严重限制了其在复合结构中的应用。为此,采用了三氯异氰尿酸(TCCA)/甲基乙基酮(MEK)溶剂型卤化法对天然橡胶(NR)表面进行化学改性,通过引入极性氯基团提高其表面活性,并系统考察了TCCA浓度、处理时间及预处理方式对T型剥离强度的影响。结果表明,经机械打磨预处理后,在室温下涂覆质量分数为15%的TCCA/MEK溶液反应20 min,可获得最优粘接性能。采用801强力胶粘接处理后的表面,其T型剥离强度达到2.85 N/mm,显著高于未处理试样,且破坏模式由界面剥离转变为橡胶基体的内聚破坏,表明界面结合强度已超过橡胶本体强度。这表明该工艺操作简便、环境友好,为天然橡胶在轮胎、密封件及减振制品等领域实现高可靠性粘接提供了可行的技术路径。
Due to its non-polar surface,low surface energy and weak boundary layer effect,natural rubber has insufficient interfacial bonding force with adhesive,which seriously limits its application in composite structures.Therefore,the surface of natural rubber(NR)was chemically modified by trichloroisocyanuric acid(TCCA)/methyl ethyl ketone(MEK)solvent halogenation method,and the surface activity was improved by introducing polar chlorine groups.The effects of TCCA concentration,treatment time and pretreatment method on T-peel strength were systematically investigated.The results show that the optimal bonding performance can be obtained by coating 15%TCCA/MEK solution at room temperature for 20 min after mechanical grinding pretreatment.The T-peeling strength of the surface treated with 801 strong adhesive reached 2.85 N/mm,which was significantly higher than that of the untreated sample,and the failure mode changed from interfacial debonding to cohesive failure of the rubber matrix,indicating that the interfacial bonding strength had exceeded the strength of the rubber body.This shows that the process is simple and environmentally friendly,and provides a feasible technical path for natural rubber to achieve high reliability bonding in the fields of tires,seals and damping products.
作者
周博秘
ZHOU Bomi(Tongliao Vocational College,Tongliao 028000,Inner Mongolia China)
出处
《粘接》
2026年第2期356-358,362,共4页
Adhesion
关键词
化学处理
天然橡胶
粘接性能
影响
chemical treatment
natural rubber
adhesive performance
influence
