A novel crosslinking agent of polymethyl(ketoxime)siloxane for room temperature vulcanized silicone rubbers: synthesis, properties and thermal stability

Abstract

A novel cross-linker polymethyl(ketoxime)siloxane was synthesized and then was cured with hydroxyl-terminated polydimethylsiloxane matrix to fabricate a series of novel RTV silicone rubber. Their properties was comparatively investigated.

Vulcanization of chlorinated polyethylene / chloroprene rubber compounds at lower temperatures in the presence of reactive silanes

“…Then the rubber compounds were kept in a water bath at 70°C for 24 h to provide humidification. In literature, humidification step was found to be essential to obtain silane grafting onto polymer matrix prior to cross‐linking 9,12,16,18 …”

“…There are some studies on silane vulcanization met in literature and most of these studies focus on cross‐linking of polyethylene 8,9,12,16–20 . Sirisinha and Meksawat evaluated peroxide and silane cross‐linking systems for ethylene‐octene copolymers in terms of their mechanical properties 8 .…”

“…Compounds taken from the extruder were subjected to water treatment in a 70°C of water bath. Zhan et al cross‐linked silicone rubber at room temperature by using polymethyl(ketoxime) siloxane 18 . They achieved sufficient amount of cross‐links by keeping the samples in a water bath at 25 °C for 36 h. N 2 was supplied into the reaction media to remove condensation by‐products.…”

“…5,8,16 There are some studies on silane vulcanization met in literature and most of these studies focus on cross-linking of polyethylene. 8,9,12,[16][17][18][19][20] Sirisinha and Meksawat evaluated peroxide and silane cross-linking systems for ethyleneoctene copolymers in terms of their mechanical properties. 8 To ensure silane vulcanization, they kept the silane containing polymer compound in a water bath at 70 C and under N 2 purge.…”

Cyclic siloxanes conjugated with fluorescent aromatic compounds as fluoride sensors

“…In terms of synthesis, cyclic siloxanes are frequently used as precursors for the synthesis of high performance polysiloxane elastomers, 12,13 and as cross-linking agents to strengthen materials. [14][15][16] Recently, polysiloxanes and cyclic siloxanes functionalized with fluorophores have exhibited excellent sensing ability to detect specific chemical species. For example, Ren et al reported tetraphenylethene units modified into polysiloxane chains possessing fluorescence ability and capable of detecting the vapor-phase of explosive compounds.…”