为开发新型耐高温和耐低温材料提供理论依据,对同一发泡率、不同纤维体积分数和同一纤维体积分数,不同发泡率的锦纶短纤维增强发泡橡胶复合材料(以下简称SFRFRC)在213～398 K温度下的拉伸性能进行测试.结果表明:常温下,增大短纤维体积分数和减小发泡率均能提高材料的拉伸性能;在不同温度下,短纤维增强发泡橡胶复合材料的初始模量、断裂强度均随着温度的升高而减小,而断裂伸长率随着温度的升高先增大后减小,玻璃化转变温度在213～233 K之间.同时,短纤维的添加虽未改变SFRFRC的玻璃化转变温度,但使玻璃化转变温度范围变宽.温度为398 K时,SFRFRC的初始模量、断裂强度、断裂伸长率均达到最低值,这与橡胶的硫化温度有关,橡胶的硫化温度为423 K,越接近硫化温度,SFRFRC的拉伸性能就越差.
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