Interactions between polymer matrices and inorganic mineral surfaces are especially relevant in polymer-filler composites and in adhesion science. Knowledge about underlying mechanisms at the interphase is a prerequisite for understanding functionality and aging. Therefore, interactions of poly(dimethylsiloxanes) (PDMS) and octamethylcyclotetrasiloxane (D4) with aluminum oxides comprising different acid-base properties were studied. For this purpose, thin layers of siloxanes were applied on aluminum oxides and analyzed by Raman spectroscopy and thermogravimetric analysis. It was observed that aluminum oxides are able to react with PDMS and D4 by heterolytic bond cleavage of SiO bonds, either by reactions with physisorbed water under catalysis of aluminum oxide or by direct reaction of the surface with siloxanes. Both reaction paths can yield SiOAl bonds and thus chemisorption which lead to strong interactions between siloxanes and aluminum oxides. However, the shown reaction paths concomitantly act as aging mechanisms leading to degradation of polymer.

聚合物基体与无机矿物表面之间的相互作用在聚合物填料复合材料和粘合科学中尤为重要。有关相间基本机制的知识是了解功能和老化的先决条件。因此，研究了聚（二甲基硅氧烷）（PDMS）和八甲基环四硅氧烷（D4）与具有不同酸碱性质的氧化铝的相互作用。为此，将硅氧烷薄层涂在氧化铝上并通过拉曼光谱和热重分析进行分析。观察到，氧化铝能够通过Si的异质键裂解与PDMS和D4反应通过在氧化铝的催化下与物理吸附的水反应或通过表面与硅氧烷的直接反应来形成O键。两种反应路径均可产生Si O Al键，从而产生化学吸附作用，从而导致硅氧烷和氧化铝之间发生强烈的相互作用。然而，所示的反应路径同时充当导致聚合物降解的老化机理。