均匀剂作用机理的研究

Study on Action Mechanism of Homogenizing Agent

采用接触角测定仪、傅立叶变换红外光谱仪、差示扫描量热仪及透射电镜分析手段，研究了均匀剂ＨＡ２对ＮＲ／ＣＩＲ（共混比３０／７０）共混胶料的表面张力、官能团及界面层的影响。提出了其作用机理：由极性不同的多种物质组成的均匀剂在两胶相界面层上通过对橡胶分子的物理或化学作用起到一种“桥”的作用，从而加快了不同胶相间的渗透与扩散速度；均匀剂中的树脂成分在低温下处于玻璃态，对橡胶可以起到一定的补强作用，而在加工温度下树脂处于粘流态，流动性大大高于橡胶，可降低橡胶分子间摩擦，具有“润滑”作用。

The influence of the homogenizing agent HA2 on the surface tension,functional group and boundary layer of NR/CIIR (30/70) blend was studied by using contact angle tester,FTIR,DSC and TEM.An action mechanism of HA2 was proposed that the homogenizing agent HA2 consisting of various substances with different polarities acted as a physical or chemical “bridge” on the boundary layer between two rubber phases to accelerate the penetration and diffusion of two phases to each other;the resin component in HA2 was in the glass state at low temperature and had reinforcing effect on rubbers,but it was in the viscous flow state at processing temperature and had lubricating effect on rubbers because it had a higher flowability than those of rubbers and could decrease the friction between rubbers.