Looking for a cleaner alternative to halogenation in the preparation of rubber for bonding with leather in footwear, atmospheric pressure plasma treatments were applied on styrene–butadiene rubber (SBR). Its adhesive capacity was improved and the highest bond strength standards for footwear were met. Two optimal processes were identified: (1) Plasma polymerization of (3-aminopropyl)triethoxysilane coatings on flat SBR and (2) plasma-activation of mechanically roughened SBR. The improvement on coated, flat SBR was mainly due to its surface chemistry having greater concentrations of polar carbon–oxygen species than the untreated SBR. For plasma-activated, mechanically roughened SBR, combined contributions of mechanical roughening and roughening by plasma irradiation were found. Coating flat SBR at 100 mm/s showed the best balance between improved bond strength and durability.

中文翻译：

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通过表面活化和常压等离子体涂层沉积提高 SBR 对鞋外底的粘合能力

为了在制备用于与鞋类皮革粘合的橡胶时寻找一种更清洁的卤化替代方法，对丁苯橡胶 (SBR) 进行了大气压等离子体处理。它的粘合能力得到了提高，并且达到了鞋类的最高粘合强度标准。确定了两种最佳工艺：（1）（3-氨基丙基）三乙氧基硅烷涂层在平面 SBR 上的等离子体聚合和（2）机械粗糙化 SBR 的等离子体活化。涂层平坦 SBR 的改进主要是由于其表面化学性质比未处理的 SBR 具有更高浓度的极性碳-氧物质。对于等离子体激活的机械粗糙化 SBR，发现了机械粗糙化和等离子体照射粗糙化的综合贡献。