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/m2 (pertaining to PVC-FRC-0) to 22 MJ/m2 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.
Abstract The objective of this study is to synthesis biomass‐based plasticizer epoxy p ‐phenylenedioleic acid ester (EPAE) using linoleic acid as raw materials via esterification and epoxidation. EPAE was used as main plasticizer of polyvinyl chloride (PVC) to replace diisobutyl phthalate (DIBP). The plasticizing effect of EPEA on the performance of PVC films was investigated. The results showed that epoxy groups were covalently bonded on branched chains of EPAE. EPAE play a plasticizing role by forming hydrogen bond between epoxy group and a‐hydrogen on PVC. When the mass of EPAE was 0.8 g in 2 g PVC, Tg of flexible PVC reached 36.1°C, the elongation at break of flexible PVC was 321.12 ± 6.13%, while the tensile strength reached 19.45 ± 1.35%. The transmittance of DIBP‐0.8 and EPAE‐0.8 at 800 nm is nearly 70%, indicating relatively high homogeneous amorphous aggregation structures. EPAE showed marginal resistance to volatilization and solvent extraction. The mechanism behind the results was discussed.
Abstract In this paper, we synthesized a kind of bio-based plasticizer epoxidized linoleic acid cardanol ester(ELCE) from cardanol and linoleic acid. Its chemical structure was characterized with FT-IR and 1 H NMR. Polyvinyl chloride(PVC) blends plasticized with ELCE were prepared via thermoplastic blending with torque rheometer. The performance including torque, mechanical property, thermal stability, plasticizing property and migration resistance of plasticized PVC blends were investigated and compared with plasticized PVC blends with commercial plasticizer dioctyl phthalate(DOP). The results showed that ELCE improved thermal stability of PVC blends. ELCE played more excellent plasticizing effect on PVC blends than DOP. The better solvent extraction resistance and volatile resistance of ELCE make it impossible to completely replace DOP in PVC products.
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