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지성완,홍진후,최재곤 조선대학교 생산기술연구소 1998 生産技術硏究 Vol.20 No.2
Recycling of thermoplastic polyolefins bumper has been carried out by stirring a coarse-crushed plastic material inside a chemical reactor using dichloromethane(MC) to release the paint film and drying the solvent. Chemical method adversely affects the physical properties or surface quality of the final product. It was found that wettability and surface tension of these polymers did not influence coating properties significantly. The diffusion coefficient of MC in PP/EPR blend has been monitored using an attenuated total reflection FT-IR. The test also demonstrated both the accuracy and quickness of FT-IR ATR experiment for measuring the diffusion coefficient of chemical recycling system Crystallinity and fractional free volume were very sensitive to the diffusion rates of small molecules in polymers as well as to the composition in recycled PP/EPR blends. It was suggested that concentration of the PP/EPR resins obtained from recycling process must be lower than 40wt percent in compounding.