A New Approach to Reducing the Flammability of Layered Double Hydroxide (LDH)-Based Polymer Composites: Preparation and Characterization of Dye Structure-Intercalated LDH and Its Effect on the Flammability of Polypropylene-Grafted Maleic Anhydride/d-LDH Composites

Abstract

Dye structure-intercalated layered double hydroxide (d-LDH) was synthesized using a one-step method, and its intercalated behaviors have been characterized by Fourier transform infrared spectroscopy (FTIR), wide angle X-ray scattering (WAXS), scanning electron microscopy, thermogravimetric analysis (TGA), etc. As a novel functional potential fire-retarding nanofiller, it was used to prepare a polypropylene-grafted maleic anhydride (PP-g-MA)/d-LDH composite by refluxing the mixture of d-LDH and PP-g-MA in xylene, aiming to investigate its effect on the flammability of the PP-g-MA composite. The morphological properties, thermal stability, and flame retardant properties of the PP-g-MA/d-LDH composite were determined by FTIR, WAXS, transmission electron microscopy, TGA, and microscale combustion calorimetry. Compared with NO3-LDH (unmodified LDH) and LDH intercalated by sodium dodecylbenzenesulfonate (conventional organo-modified LDH), d-LDH can significantly decrease the heat release rate and the total heat release of the PP-g-MA composite, offering a new approach to imparting low flammability to LDH-based polymer composites.

Thermal and flammability properties influenced by Zn/Al, Co/Al, and Ni/Al layered double hydroxide in low‐density polyethylene nanocomposites

“…TGA is an effective technique for evaluating thermal stability performance of the polymer nanocomposite . Figure (a–c), Table , and Table S2 (Supporting Information) summarized the thermal analyses of LDPE/LDPE‐g‐MAH (PG) nanocomposite containing hydrophobic and hydrophilic Ni/Al, Co/Al, and Zn/Al‐LDH.…”

Structure and crystallization behaviour of syndiotactic polystyrene/layered double hydroxide nanocomposites

“…In recent days, MCC has been extensively used for measuring the flame‐retardant properties of polymer based nanocomposites . Figure shows HRR plots for pristine sPS and its nanocomposites.…”

Effect of phytic acid–modified layered double hydroxide on flammability and mechanical properties of intumescent flame retardant polypropylene system

“…Layered double hydroxides (LDHs) are considered as a new emerging class of the layered crystals inorganic fillers, which have yet to show promising effects on polymer properties in the preparation of LDH‐based multifunctional polymer nanocomposites because of their highly tunable properties and wide applications . The general molecular formula of LDH can be illustrated as [M 2 + 1 − x M 3+ x (OH) 2 ] x + · [(A n − ) x / n · y H 2 O] x − , where M 2+ , M 3+ , and A n − represent divalent metal cations, trivalent metal cations, and interlayer anions, respectively.…”