Maleic anhydride grafted linear low-density polyethylene/waste paper powder composites with superior mechanical behavior

The present work aims to study the perspectives of an efficient utilization of waste products as fillers for the thermoplastic polymer. Maleic anhydride grafted linear low-density polyethylene (LLDPE-g-MA), without any compatibilizers, has been used as polymer matrix to prepare composites with different contents (0–50 phr) of waste paper powder (WPP). Mechanical properties assessment has shown up to 88% improvement in tensile strength and a huge increment of 409% in Young's modulus for the composites prepared at 30 phr WPP. The reinforcement effect of WPP in the polymer matrix was also assessed by Guth-Gold and modified Guth-Gold equations. Microstructural analysis of the fractured surfaces revealed good interfacial adhesion with fewer voids and fiber pull out up to 30 phr WPP loading. Interfacial interaction between maleic anhydride group of LLDPE-g-MA and OH groups present dominantly in the cellulosic component of WPP was established through Fourier transform infrared spectroscopy. The thermal properties of prepared composites were analyzed by differential scanning calorimetry. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45167.