【摘要】 利用低场核磁交联密度测定仪分析不同硫化时间下橡胶材料的交联密度,并与相同时刻下盘式硫化仪测得的扭矩对比,定量地发现扭矩与交联密度近似成线性关系。通过有限元传热分析和硫化程度场分布的二次算法开发,圆柱形橡胶试样表面和芯部的温升历程和硫化程度的仿真结果与实验数据高度吻合。该研究对于橡胶制品的硫化工艺设计提供参考。更多还原

【Abstract】 Vulcanization plays a key step in rubber forming and processing. In this work,a low-field nuclear magnetic resonance instrument was used to analyze the crosslinking density of rubber materials at different curing times,and the obtained results were compared with the torque measured by the disc-type curometer at the same time. The results indicated that the relationship between the torque and crosslinking density is approximately linear. The degree of cure distribution was calculated by means of the finite element heat transfer analysis and self-written algorithm,and the simulation results for temperature-rising curves and degrees of cure on the surface and in the heart of cylindrical rubber specimens were highly consistent with the experimental data. This work provides a design reference for the vulcanization process of rubber articles.更多还原