**Morphology, Thermal Stability, and Flammability Properties of Polymer-Layered Double Hydroxide (LDH) Nanocomposites: A Review**

**Mokgaotsa Jonas Mochane 1,\*, Sifiso Innocent Magagula 1, Jeremia Shale Sefadi 2,\*, Emmanuel Rotimi Sadiku 3 and Teboho Clement Mokhena 3**


Received: 15 May 2020; Accepted: 1 July 2020; Published: 14 July 2020

**Abstract:** The utilization of layered nanofillers in polymer matrix, as reinforcement, has attracted grea<sup>t</sup> interest in the 21st century. This can be attributed to the high aspect ratios of the nanofillers and the attendant substantial improvement in di fferent properties (i.e., increased flammability resistance, improved modulus and impact strength, as well as improved barrier properties) of the resultant nanocomposite when compared to the neat polymer matrix. Amongst the well-known layered nanofillers, layered inorganic materials, in the form of LDHs, have been given the most attention. LDH nanofillers have been employed in di fferent polymers due to their flexibility in chemical composition as well as an adjustable charge density, which permits numerous interactions with the host polymer matrices. One of the most important features of LDHs is their ability to act as flame-retardant materials because of their endothermic decomposition. This review paper gives detailed information on the: preparation methods, morphology, flammability, and barrier properties as well as thermal stability of LDH/polymer nanocomposites.

**Keywords:** nanocomposites; nanofillers; thermal stability; flammability; polymer matrix
