废硬质聚氨酯泡沫塑料的回收利用技术研究

Study on recycling technology of waste RPUF

采用物理化学回收方法回收废硬质聚氨酯泡沫塑料,探讨了再生硬质聚氨酯泡沫塑料(RRPUF)、马来酸酐(MAH)接枝聚丙烯(PP)(PP-g-MAH)的用量及不同类型降解剂对PP/RRPUF/PP-g-MAH共混材料性能的影响,用傅里叶变换红外光谱和偏光显微镜表征了RRPUF和PP/RRPUF/PP-g-MAH。在适当温度下,以四乙烯五胺/二乙二醇为降解剂,RRPUF用量为150 phr,PP-g-MAH用量为5 phr时,PP/RRPUF/PP-g-MAH的表面平整,性能最佳;RRPUF的加入完全破坏了PP的球晶结构,使PP的结晶形态发生了变化。

The waste rigid polyurethane foam（RPUF） was recycled by physical and chemical recycling method. The effect of the mass content of recycled RPUF（RRPUF） and polypropylene grafted by maleic anhydride（PP-g-MAH） and different kinds of degradants on the properties of PP/RRPUF/PP-g-MAH was studied. RRPUF and PP/RRPUF/PP-g-MAH were characterized by Fourier transform infrared spectroscopy （FTIR） and polarized light microscopy（PLM）. The recycled product prepared at an appropriate temperature showed flat surface and optimum properties when adding tetraethylene pentamine/diethylene glycol as degradant, 150 phr of RRPUF and 5 phr of PP-g-MAH. The introduction of RRPUF completely destroyed the spherulite structure and changed the crystallization morphology of PP.