Effect of triazine based silane coupling agent modified LDH on the thermal and mechanical properties of PVC based nanocomposites

First, a triazine-based silane coupling agent (TSCA) was synthesized through the reaction of 3-aminopropyl tri-ethoxy silane and cyanuric chloride. Then, zinc/aluminum layered double hydroxide (LDH) was modified by a synthesized TSCA to prepared TSCA-LDH. In the next step, the poly(vinyl chloride) (PVC) nanocomposites were prepared by adding 4, 8, and 12-wt% of TSCA-LDH through solvent processing with ultrasonic technique. The resulting nanocomposites were evaluated by FTIR, XRD, FE-SEM, and TEM. FT-IR and XRD studies confirmed that the KH550 had been linked to LDH nanoparticles. The FESEM and TEM results showed good dispersion of TSCA-LDH in the PVC matrix. The thermal and mechanical behavior of the NCs were studied, and the results show an improvement in these properties compare to neat PVC. Also, the thermal aging stability of the PVC was increased by adding the TSCA-LDH nanoparticles as a thermal stabilizer, and the results were confirmed with the Congo red test by decreasing the exiting of hydrogen chloride from PVC by adding the TSCA-LDH to the polymer matrix.

Automated summary

A triazine-based silane coupling agent (TSCA) was synthesized and used to modify zinc/aluminum layered double hydroxide (LDH) for preparing PVC nanocomposites, which showed improved thermal and mechanical behavior. The addition of TSCA-LDH nanoparticles as a thermal stabilizer also increased the thermal aging stability of PVC.