Abstract
The waste cooking oil (WCO) production from the catering industry and food processing industry causes serious environmental, economic and social problems. However, WCO can be used for the preparation of fine chemicals such as internal plasticizer. With this aim, this work is focused on preparing internal plasticizer by using WCO and determining technical viability of non-migration poly (vinyl chloride) (PVC) materials. The mannich base of waste cooking oil methyl ester (WCOME) was synthesized from WCO via esterification, interesterification and mannich reaction, which was used to produce self-plasticization PVC materials as an internal plasticizer. The results showed that the PVC was plasticized effectively. Self-plasticization PVC films showed no migration in n-hexane, but 15.7% of dioctyl phthalate (DOP) leached from DOP/PVC(50/50) system into n-hexane. These findings transformed the traditional plastic processing technology and obtained cleaner production of no migration plasticizer from WCO.
Highlights
The production of internally plasticized PVC materials can transform the traditional plastic processing technology, which mainly includs hot mixing, dry mixing and solvent casting method
The internally plasticized PVC materials can be directly produced plastic products without further plasticization process, which will spur a revolution in plastic processing technology
Mannich base of waste cooking oil methyl ester (WCOME) was synthesized from WCO, the chemical structure was detected using Fourier transform infrared spectroscopy (FT-IR) and Hydrogen nuclear magnetic resonance spectroscopy (1H NMR), which was used as a novel non-migration plasticizer for self-plasticization PVC materials
Summary
The production of internally plasticized PVC materials can transform the traditional plastic processing technology, which mainly includs hot mixing, dry mixing and solvent casting method. The internally plasticized PVC materials can be directly produced plastic products without further plasticization process, which will spur a revolution in plastic processing technology. The properties of the PVC materials such as Tg, thermal stability, migration resistance and mechanical properties were investigated. These properties of self-plasticization PVC were compared with neat PVC and PVC/DOP system, and the internal plasticization mechanism was discussed. The modified PVC materials were expected to be commercial application in producing these products with high requirement in migration resistance such as food packing, toys and medical devices. The technical viability of non-migration PVC was determined, and the strategy was expected to improving the traditional plastic processing technology
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