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Intercalation products of crosslinking agents such as 6-R-1, 3, 5-triazine-2, 4-dithiol monoanion (R is a substituent) into Mg-Al layered double hydroxide (RTD/LDH) have been synthesized with the calcination-rehydration reaction using Mg-Al oxide precursors calcined at 500°C for 2h. RTD/LDH has been modified by anionic surface active agent (AS/RTD/LDH). These organic-inorganic nanohybrids have been characterized by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. Vulcanization reaction of chlorinated acrylic rubber by AS/RTD/LDH has been investigated for the scorch time, the apparent cure rate constant and the induction period by a swing die rheometer at 170°C. The basel spacing (003) was found to be 0.83nm for the intercalated product of 1, 3, 5-triazine-2, 4, 6-trithiol monoanion (TT/LDH) and 0.81nm for that of 6-dibutyl-1, 3, 5-triazine-2, 4-dithiol monoanion (DB/LDH), 0.78nm for the carbonate anion-intercalated LDH by XRD. The absorption peaks due to triazine ring (1580cm-1) and methylene (2950cm-1) were shown in the FT-IR spectrum of the TT/LDH and DB/LDH. These results indicate that TT or DB was intercalated into the LDH. The AS/RTD/LDH has shown the diffraction peak similar to the RTD/LDH. The induction period (t10) was 0.7-1min using 1, 3, 5-triazine-2, 4, 6-trithiol monosodium salt, in contrast to 10min using AS/TT/LDH. The crosslinking of chlorinated acrylic rubber using the AS/TT/LDH showed a proper induction period.

Intercalation of Triazinethiol Molecules into Layered Double Hydroxide and Their Crosslinking Property for Halogenated Rubber