Preparation,Characterization and Properties of Peanut Shell Liquefied Resin Foam Material Modified with Polyethylene Glycol
Peanut shell liquefied resin(PLR)was modified by polyethylene glycol(PEG-400)to prepare PEG-400/PLR resin,further foaming to prepare PEG-400/PLF foam in order to improve the brittleness and mechanical properties of PLF foam.The modified products were analyzed and characterized by rotational rheometer,Fourier transform infrared spectroscopy,scanning electron microscope,and thermogravimetric analyzer.The effects of different amounts of polyethylene glycol(0,2%,4%,6%)on the compressive strength,pulverization rate,impact toughness,apparent density,sound insulation performance,and residual carbon rate of the foam material were investigated.The results showed that the addition of polyethylene glycol not only facilitated the stirring operation during foaming process,but also improved the flexibility of the resin,helping to reduce the occurrence of adverse conditions such as foam slagging and brittleness.Hydroxyl groups in the polyethylene glycol structure partially reacted with hydroxyl groups in the resin,successfully introducing flexible long chains into the molecular structure of resin,which played a toughening effect.After the polyethylene glycol modification,the pore size of the foam increased,and the distribution became more uniform,with the cell type of the foam changing from majority of closed-cell structures before modification to partially open-cell structures.When the PEG-400 addition amount was 4%,the comprehensive performance of the prepared foam 4%PEG-400/PLF was optimal.Compared to the unmodified foam PLF,the pulverization rate of 4%PEG-400/PLF decreased by 61.0%,the impact toughness increased by 32.6%,the apparent density increased by 8.4%,the compressive strength increased by 11.4%,the sound insulation performance increased by 8.6%,and the residual carbon rate remained above 55%,demonstrating of excellent heat resistance and fire resistance.
peanut shell liquefied resinpolyethylene glycolfoam materialmodificationincrease of toughness
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维普
