摘要
使用红外光谱（IR）、差示扫描量热法（DSC）,热失重（TGA）等方法研究氢化丁腈橡胶（HNBR）分子结构与其低温、高温下物理性能之间的关系。研究结果显示,HNBR橡胶在720~730cm-1处具有明显的（CH2）n（n〉4）红外特征吸收峰,由此可以鉴别HNBR与丁腈橡胶（NBR）;随丙烯腈含量及氢化度的增大,HNBR的初始热分解温度升高;分子结构中丙烯腈含量越大,玻璃化转变温度越高,其硫化胶的拉伸强度和恒定压缩永久变形越大,这与HNBR分子中交替结构单元增多引起的结晶有关。
A relationship of molecular structure and physical properties at low and high temperatures of hydrogenated nitrile rubber（HNBR）was investigated by Infrared（IR）Spectroscopy,Differential Scanning Caloricity（DSC）and Thermo Gravimetric Analysis（TGA）.It is shown that HNBR has characteristic peak of the（CH2）n（n4）in the backbone at 720-730cm-1 for identified HNBR from NBR.The initial decomposition temperature rose with the increase of the acrylonitrile content and hydrogenation.It is also concluded that the higher acrylonitrile content,the higher Tg,tensile strength and compression set of HNBR,which could be attributed to the crystallization caused by more content of repeat units.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2011年第2期31-34,51,共5页
Journal of Materials Engineering
关键词
氢化丁腈橡胶
分子结构
低温性能
高温性能
物理性能
hydrogenated nitrile rubber
molecular structure
low temperature property
high temperature property
mechanical performance
