Interaction of Poly(dimethylsiloxane) and octamethylcyclotetrasiloxane with aluminum oxides comprising different acid-base properties

被引：9

作者：

Kochanke, Artur ^{[1
,2
]}

Uffing, Christoph ^{[1
]}

Hartwig, Andreas ^{[2
,3
]}

机构：

[1] Robert Bosch GmbH, Corp Sect Res & Adv Engn, Plast Engn, Robert Bosch Campus 1, D-71272 Renningen, Germany

[2] Univ Bremen, Dept Biol Chem 2, Leobener Str 3, D-28359 Bremen, Germany

[3] Fraunhofer Inst Mfg Technol & Adv Mat IFAM, Wiener Str 12, D-28359 Bremen, Germany

来源：

POLYMER DEGRADATION AND STABILITY | 2019年 / 161卷

关键词：

Silicone; Degradation; Aging; Polymer-filler composite; Aluminum oxide; Acid-base properties; THERMAL-DEGRADATION; SILICONE-RUBBER; FUMED SILICA; POLYDIMETHYLSILOXANE; ADHESION; SURFACE; FILMS; HEXAMETHYLCYCLOTRISILOXANE; POLYSILOXANES; DECOMPOSITION;

D O I：

10.1016/j.polymdegradstab.2019.01.010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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 Si-O 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 Si-O-Al 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. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：19 / 29

页数：11

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