Abstract

In this research, graft copolymerization of Methyl methacrylate (MMA; hereafter) on to Polychloroprene rubber (CR; hereafter) has been processed in the presence of hydrogen peroxide as an initiator. Grafting reaction has been carried out in a mechanical mixer, and factors such as time, temperature, monomer, and initiator’s concentration were investigated and optimized. FTIR confirmed the grafting reaction occurred in the CR polymer as evident from a peak of a carbonyl group. The adhesive strength of grafted adhesive was analyzed by standard peel testing on canvas–canvas and leather–leather substrates. The effect of variation in environmental conditions such as storage time, exposure to elevated temperature, and immersion of adhesively joined substrates in the water on the peel strength of adhesive bonding was also studied. The results were compared with the strength of commercially available adhesives in local market. The solid content of grafted adhesive (55%) showed their greater applicability and high strength characteristics. The maximum peel strength achieved was 79 N/mm for canvas–canvas while 73 N/mm for leather–leather substrates. The percentage fall in peel strength after exposure to different environmental conditions was shallow as compared to commercially available adhesives. ‘GA-13’ the grafted adhesive has a high potential for the Leather-base industry and other applications.

摘要

在这项研究中，在过氧化氢作为引发剂的存在下，将甲基丙烯酸甲酯（MMA；下文）接枝共聚到聚氯丁二烯橡胶（CR；下文）上。接枝反应在机械混合机中进行，对时间、温度、单体、引发剂浓度等因素进行了考察和优化。FTIR 证实了在 CR 聚合物中发生了接枝反应，从羰基的峰可以看出这一点。通过在帆布-帆布和皮革-皮革基材上进行标准剥离测试来分析接枝粘合剂的粘合强度。还研究了环境条件的变化，例如储存时间、暴露在高温下以及将粘合连接的基材浸入水中对粘合剂粘合剥离强度的影响。结果与当地市场上市售粘合剂的强度进行了比较。接枝粘合剂的固含量（55%）显示出其更大的适用性和高强度特性。帆布-帆布的最大剥离强度为 79 N/mm，皮革-皮革基材的最大剥离强度为 73 N/mm。与市售粘合剂相比，暴露于不同环境条件后剥离强度的百分比下降幅度较小。'GA-13' 接枝粘合剂在皮革基工业和其他应用中具有很高的潜力。帆布-帆布的最大剥离强度为 79 N/mm，皮革-皮革基材的最大剥离强度为 73 N/mm。与市售粘合剂相比，暴露于不同环境条件后剥离强度的百分比下降幅度较小。'GA-13' 接枝粘合剂在皮革基工业和其他应用中具有很高的潜力。帆布-帆布的最大剥离强度为 79 N/mm，皮革-皮革基材的最大剥离强度为 73 N/mm。与市售粘合剂相比，暴露于不同环境条件后剥离强度的百分比下降幅度较小。'GA-13' 接枝粘合剂在皮革基工业和其他应用中具有很高的潜力。