顺丁橡胶硫化胶的高温拉伸性能研究

研究炭黑用量和硫化体系[普通硫化（CV）体系、半有效硫化（SEV）体系、有效硫化（EV）体系和过氧化物（DCP）硫化体系]对顺丁橡胶（BR）硫化胶的高温拉伸性能的影响。结果表明：不同炭黑用量的BR硫化胶的50%和100%定伸应力均随着温度的升高而逐渐增大，拉伸强度和拉断伸长率均随着温度的升高而逐渐减小，拉伸强度保持率随着炭黑用量的增大而增大；各种硫化体系的BR硫化胶的50%和100%定伸应力均随着温度的升高而逐渐增大，拉伸强度和拉断伸长率均随着温度的升高而逐渐减小；过氧化物硫化体系硫化的BR硫化胶拉伸强度较小，但高温下的拉伸强度保持率较大。;The effects of carbon black content and curing system[curing system（CV），semi-effective curing system（SEV），effective curing system（EV）and peroxide（DCP）curing system] on the high temperature tensile properties of BR vulcanizates were investigated.The results showed that，with the increase of temperature，the stress at 50% and 100% elongation of BR vulcanizates with different carbon black content increased，the tensile strength and elongation at break decreased，and the tensile strength retention rating was enlarged with the increase of carbon black content.With the increase of temperature，the stress at 50% and 100% elongation of BR vulcanizates with all kinds of curing system increased，and the tensile strength and elongation at break decreased.The tensile strength of BR vulcanizate with peraxide curing system decreased，but the retention rate of tensile strength was larger at high temperature