ABSTRACT The production of silica masterbatches with reduced mixing energy consumption and enhanced mechanical properties has been developed. The unit operations in the process are the preparation of silica slurry in the presence of a suitable surfactant (in this case are ammonium laurate and diethylene glycol), the addition of the slurry to the fresh natural rubber latex (NRL) under stirring, coagulation of the mixture by the addition of 5 wt-% formic acid, dewatering of the coagulum and drying in an oven at 60˚C for 48 h to obtain the silica-incorporated NR. The amount of silica in silica/NR masterbatches was also investigated. Cure characteristics and mechanical properties of vulcanisates prepared from the masterbatches were compared with those prepared by a conventional direct mixing method. Silica/NR masterbatches gave higher maximum torque, shorter cure time, greater modulus, tensile strength and hardness due to better filler dispersion evidenced from scanning electron micrograph studies.

中文翻译：

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新鲜天然胶乳混合制备白炭黑母料的硫化特性及力学性能

摘要 已开发出具有降低混合能耗和增强机械性能的二氧化硅母料的生产。该过程中的单元操作是在合适的表面活性剂（在这种情况下是月桂酸铵和二甘醇）存在下制备二氧化硅浆料，在搅拌下将浆料添加到新鲜的天然胶乳（NRL）中，将通过添加 5 wt-% 甲酸，将凝结物脱水并在 60°C 的烘箱中干燥 48 小时，获得掺入二氧化硅的 NR。还研究了二氧化硅/NR 母料中二氧化硅的量。将由母料制备的硫化橡胶的硫化特性和机械性能与通过传统直接混合方法制备的硫化橡胶的硫化特性和机械性能进行比较。二氧化硅/NR 母料提供更高的最大扭矩，