화학공학소재연구정보센터
Kautschuk Gummi Kunststoffe, Vol.56, No.4, 159-165, 2003
Influence of silanisation of precipitated silica on dynamic-mechanical properties and the filler partition in NBR/BR blends
The influence of surface modification of precipitated silica by defined silanization on filler-rubber interaction and filler distribution in NBR/BR blends is investigated. The distribution of silica in the different phases of blends is estimated from the height of the loss modulus in the glass transition range. The linear increase of the maximum value of the loss modulus is not only caused by the increase in the volume fraction of the silica, but is also governed by the strength of the filler-matrix interaction. There is a greater linear increase with increasing phase bonding, i.e. with decreasing interface tension; more energy is dissipated in the glass transition range. It is shown that with increasing phase bonding the extent of the dependence G"=(phi) rises and, due to the surface modification, the filler distribution, the dispersion and the dynamic-mechanical properties can be selectively influenced.