腰果酚-木质素复合自催化型聚氨酯泡沫的制备及性能研究

摘要

Novel auto-catalytic cardanol-based polyols (CPO) with tert-butyl on the main chain were synthesized from cardanol and used to prepare the cardanol-based polyurethane foam(CPUF) with polyaryl polymethylene isocyanate (PAPI) under catalyst-free conditions.Subsequently, CPUFs were modified by lignin to prepare lignin and cardanol based polyurethane foam(LCPUF).The influences of lignin on the structure and performance of the polyurethane foam were further investigated.The results showed that lignin significantly improved the apparent density and mechanical properties of the CPUF.When the dosage of lignin was 20%, the cell diameter of the synthesized foam LCPUF slightly decreased and had the maximal apparent density and compressive strength of 81.48 kg/m3and 0.44 MPa.Thermogravimetric (TG) analysis demonstrated that lignin had no significant effect on the thermostability of polyurethane foam.%以腰果酚为原料,先合成一种分子主链结构上含有叔氨基的自催化型聚醚多元醇(CPO),然后与异多苯基多亚甲基多异氰酸酯(PAPI)在无催化剂下制备出一种腰果酚基自催化型聚氨酯泡沫(CPUF),再采用木质素对CPUF增强改性,制备腰果酚-木质素基复合自催化型聚氨酯泡沫(LCPUF),并研究了木质素添加量对此复合聚氨酯泡沫的结构与性能的影响.结果表明:采用木质素改性CPUF可有效提高泡沫的表观密度及压缩强度;当木质素添加量为CPO质量的20%时,所制备的LCPUF泡孔略有减小,表观密度和压缩强度最大,分别为81.48 kg/m3、0.44 MPa;TG分析显示,木质素的加入对CPUF的热降解过程无显著影响.