耐低温氟醚橡胶结构和基本物理性能研究

Study on Structures and Properties of Fluororubber of Improved Low Temperature Property

研究了耐低温氟醚橡胶的结构特征和基本物性，结果表明：１９Ｆ核磁共振谱中２０～３０×１０－６处化学位移是醚键的特征，－８×１０－６和－２×１０－６是－ＣＮ基团的指纹峰；ＶｉｔｏｎＧＬＴ和СКФ－２６０МПАН耐高温老化性能不低于Ｆ２４６氟橡胶，但低温性能远优于Ｆ２４６，二者均可满足－５０℃低温使用要求，而且СКФ－２６０МПАН可以在更低温度下保持柔顺性。

Structures and main properties of the fluororubber of improved low temperature property have been investigated The results show that the fluororubber mentioned above could beused in an environment of -50～300℃ and the structure characteristics of them could be showed clearly in 19 F NMR spectrum,-O- in 20～30×10 -6 and -CN group in -8×10 -6 and -2×10 -6