【摘要】 成功地利用超声波对天然橡胶进行了硫化 ,所得试件展示了与传统硫化方法制得的试件相同的性能 ,但该工艺表现出许多传统硫化方法所不具备的优点 .用滞后能量损失理论及声化学作用 ,解释了超声硫化的机理 .用温频转换法 ,得到了天然橡胶混炼胶在高频条件下的动态力学性能 ,由此得到硫化开始阶段的温升曲线 ,该曲线与实验结果吻合更多还原

【Abstract】 Conventionally rubbers are vulcanized in the presence of sulphur or peroxide at high temperature and pressure. This process has several significant shortcomings. In the present paper, natural rubber is vulcanized with the application of ultrasonic energy. The products of ultrasonic process exhibit the same properties as those that are vulcanized by using conventional process. However,the ultrasonic vulcanization process demonstrates many advantages over the traditional vulcanization methods such as high production rate, energy saving, uniform cure, etc. Energy generated due to phase difference between strain and stress,and sonochemical reaction within the compound are considered responsible for the vulcanization of rubber. The dynamic properties of unvulcanized natural rubber under ultrasonic frequency are obtained by means of the method of reduced variables of Ferry and Fitzgerald.Temperature rise curves at the beginning stage of the vulcanization are calculated from such properties.The calculated curves agree with the experimental results.更多还原