Plasticizing and Strengthening Poly(vinyl chloride) with Structurally Different Ionic Liquids
摘要
This study simultaneously plasticizes and strengthens poly(vinyl chloride) (PVC) with structurally different ionic liquids (ILs), namely monomeric [Bmim]NTf2, linear polymerized PImC6NTf2, and branched polymerized P(VIm-4)NTf2. Notably, PImC6NTf2 exhibits the best performance. Dynamic mechanical analysis reveals that the glass transition temperature of PImC6NTf2/PVC composite film is lower than that of dioctyl phthalate (DOP)/PVC, indicating enhanced processability. Compared with neat PVC film, the 4% PImC6NTf2/PVC film exhibits 747.2%, 165.4%, and 49.1% increases in elongation at break, tensile strength, and Young’s modulus, respectively, along with a 27.4-fold rise in fracture energy. Additionally, the thermal stability, hydrophobicity, and wear resistance of PVC are also improved. These findings demonstrate the great potential of linear polymerized ILs as innovative PVC plasticizers.