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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温度下的压缩性能进行测试。结果表明:在213 K时,SFRFRC的压缩性能发生明显变化,已经由高弹态转变为玻璃态,而玻璃化转变温度在213~233 K之间。纤维体积分数和发泡率均对SFRFRC的耐低温性能有很大影响。短纤维的添加和适当改变发泡率都明显改善了SFRFRC在低温下的压缩性能。在定160 N和5 mm条件下,同一发泡率、不同纤维体积分数的SFRFRC,压缩永久变形随着纤维体积分数的增加而呈指数下降;而5%纤维体积分数、不同发泡率的SFRFRC,压缩永久变形随着发泡率的增大而增大。
In order to provide a theoretical basis for the development of new high temperature and low temperature resistant materials, for the same foaming rate, different fiber volume fraction and the same fiber volume fraction, different foam ratio of nylon staple fiber reinforced rubber foam composites (hereinafter referred to as SFRFRC) ~ 398 K temperature compression test. The results show that the compressibility of SFRFRC changes obviously at 213 K, and it has been transformed from high elastic state to glassy state, while the glass transition temperature is between 213 and 233 K. Both fiber volume fraction and foaming rate have a great influence on the low temperature resistance of SFRFRC. The addition of short fibers and the proper change of foaming ratio all significantly improve the compressibility of SFRFRC at low temperatures. Under the condition of 160 N and 5 mm, the SFRFRC and compression set with the same foaming rate and different fiber volume fraction decreased exponentially with the increase of fiber volume fraction. However, SFRFRC with 5% fiber volume fraction and different foaming rate , Compression set increases with increasing foaming rate.