Optical, mechanical and thermal behavior of Poly(vinyl chloride) composite films embedded with modified TiO2 usingvitamin B1 as modifier agent

Poly(vinylchloride) (PVC) is the most widely used polymer after polyethylene and polypropylene. One of the major problems that limit the practical use of the PVC is its lower thermal stability and brittleproperties [1]. Utilizing metal nanoparticles (NPs) into polymeric matrices has been studied extensively to improve features and capacities [2]. According to the agglomeration of NPs, different organic or inorganic materials can be used as modifiers to surface modification of NPs [3]. In this study, vitamin B1 (VB1) asbiosafe and naturally synthesized molecule, was used to surface modification of NPs for the first time. In addition, TiO2NPs due to their nontoxicity, chemical and biologicalineffective and low cost, was used as modifier for PVC matrixand the effect of various amounts of modified NPs on prepared nanocomposites (NCs) was studied (figure 1).