(338ac) Exploring the Sustainable Potential of LDH-Supported Metallocene Catalysts for LLDPE Production: A Promising Approach

Layered double hydroxides (LDHs) are versatile layered materials facilitate profound research applications. The modification of these layered materials with surfactant like sodium dodecyl sulfate(Na-DDS) could enhance the interfacial properties and also enlarges the basal spacing. This work reports heterogenization of metallocene(Zr) catalysts over range of LDH-DDS for LLDPE synthesis. The LDH supports offered great compositional tunability which influenced the catalytic properties of the heterogenized metallocene and exhibited appreciably high activity as that of the molecular Zr catalyst. The intercalated carbonate anion in the support exhibited relatively lower product yield however the polydispersity and the molecular weight was enhanced by 1.5 and 10 times, respectively. The intercalated DDS in the galleries of NiFe and ZnAl LDHs as support exhibited higher activity, molecular weigh and polydispersity than corresponding homogenous Zr catalyst. Additionally, the LLDPE synthesized where of relatively high thermal stability as demonstrated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The supported catalysts were characterized by ¹³C and ²⁷Al magnetic angle spinning (MAS) solid state NMR spectroscopy. The surface morphologies of the LDH and corresponding catalysts were analyzed by scanning electron microscope (SEM) and transmission electron microscope (TEM).

The molecular weight distribution attributed by the supported catalyst complex is represented in the attached figure. All the relevant information will be shared during the presentation.