Klat Darja, Karimi-Varzaneh Hossein Ali, Lacayo-Pineda Jorge
Continental Reifen Deutschland GmbH, Jaedekamp 30, 30419 Hanover, Germany.
Polymers (Basel). 2018 May 8;10(5):510. doi: 10.3390/polym10050510.
The morphology of natural rubber/styrene⁻butadiene rubber blends (NR/SBR) was characterized by atomic force microscopy (AFM), with regard to curing temperature and curing time. The changes in blend morphology were directly visualized by AFM which confirmed the results of indirect experiments like differential scanning calorimetry (DSC). Comparing the phase morphologies at different curing temperatures indicated that the domain size of SBR increases with temperature at lower curing temperatures, but domain growing stops at the latest scorch time. This effect is explained by longer scorch times at low curing temperatures which facilitate phase separation, while the short scorch times at higher temperatures meant that the coalescence of SBR phases was hindered by cross-linking between polymer chains.
通过原子力显微镜（AFM）对天然橡胶/丁苯橡胶共混物（NR/SBR）在不同硫化温度和硫化时间下的形态进行了表征。AFM直接观察到共混物形态的变化，证实了差示扫描量热法（DSC）等间接实验的结果。比较不同硫化温度下的相形态表明，在较低硫化温度下，SBR的微区尺寸随温度升高而增大，但在最晚焦烧时间时微区生长停止。这种现象的解释是，较低硫化温度下焦烧时间较长，有利于相分离，而较高温度下焦烧时间较短，这意味着聚合物链之间的交联阻碍了SBR相的聚结。
