Phosphorus Containing Rubber Seed oil as a Flame Retardant Plasticizer for Polyvinyl Chloride

Abstract

The application of phthalate plasticizers has been restricted around the world due to their poor migration and potential harm to the human body. Hence, producing functional bio-based plasticizers via exploiting clean and reusable resources meets the satisfaction of current demands. In this study, flame-retardant rubber seed oil-based plasticize (FRP) was prepared via epoxidation reaction and ring opening addition reactions, which was used as a flame-resistant plasticizer for polyvinyl chloride to replace petroleum-based phthalate plasticizer. When DOP was replaced with FRP, the torque of PVC blends increased from 11.4 to 18.4 N⋅m, the LOI value increased from 24.3% for PVC-FRP-0% to 33.1% for PVC-FRP-20. The THR value diminished from 39 MJ/m 2 (pertaining to PVC-FRC-0) to 22 MJ/m 2 Tg increased from 23°C to 47°C, the weight loss of plasticized PVC blends significantly reduced from 22.6% to 2.8% in leaching tests. The study provided a new way to prepare flame retardant plasticizer using rubber seed oil as raw material.

Synthesis and properties of chlorine and phosphorus containing rubber seed oil as a second plasticizer for flame retardant polyvinyl chloride materials

“…The chemical structure of RSO, ERSO and NPFP was investigated with FTIR and 1 H NMR. FTIR and 1 H NMR of RSO and ERSO has been reported in our previous study 20 . FTIR and 1 H NMR of NPFP are shown in Figure 2 and Figure 3.…”

“…FTIR and 1 H NMR of NPFP are shown in Figure 2 and Figure 3. As seen in Figure 2, the absorption peak of -C=O is found at 1742 cm -1 , the absorption peaks at 2853 and 2921 cm -1 are attributed to -CH-and -CH 2 -in the fatty acid chain of NPFP [19][20] . The most obvious absorption peak in the infrared spectrum of NPFP appears at 1099 cm -1 , where is the vibration absorption peak of P-O-C, the vibration absorption peak of P-O appears at 823 cm -1 21 .…”

“…Temperature was heated from 50 o C to 600 o C at a heating rate of 10 o C/min. Solvent extraction tests were carried out according to our recent study 19 .Volatility of ERSO were carried out according to our recent study [19][20] , which was evaluated by placing plasticized PVC samples in a convection oven at 70 o C for 24 h and cooled to room temperature in a desiccator for 2 h. The weight changes were measured before and after the heating. Mechanical properties were determined according to ISO 527-5:2009 on an electronic tensile testing machine (Xinsansi Co., China).…”

“…RSO is relatively cheap compared with petrochemical raw materials, and it is a plasticizer in itself. Based on RSO and combined with other chemical reagents, various plasticizers with different functions can be synthesized 20 . ERSO has epoxy groups in its molecular structure and shows strong reactivity.…”