聚己内酯型聚羟基氨基甲酸酯的合成

以聚己内酯二元醇(PCL Diol)、丁二酸酐以及碳酸甘油酯为原料，合成了端基为五元环碳酸酯的聚己内酯功能性大单体(PCL 2GC)；以PCL 2GC、己二胺及硅烷偶联剂为原料，研究了反应条件对合成线性聚羟基氨基甲酸酯(PHU)相对分子质量及其分布的影响，以及交联密度和交联方式对PHU/SiO2热力学性能的影响.结果表明：线性PHU的相对分子质量随PCL 2GC浓度和反应温度的升高而先增后减，随反应时间、胺用量的增大而降低；PHU的耐热温度相比于类似结构的传统聚氨酯提高了30~40 ℃，PHU/SiO2交联聚合物的结晶度及热稳定性随交联密度的增大而降低；交联聚合物中无定形SiO2的分布较为均匀.

Synthesis of Poly Hydroxyurethanes Based on Poly (Caprolactone)

Functionalized poly (caprolactone) diol (PCL-Diol) end capped with five-membered cyclic carbonate (PCL-2GC) was synthesized from PCL-Diol, succinic anhydride and glycerol-1, 2-carbonate. The relative molecular mass and its distribution of linear polyhydroxyurethanes (PHU) prepared from the reaction of PCL-2GC with 1,6-hexanediamine decrease as the reaction time and the dosage of amine increase, while first increase with increasing PCL-2GC concentration and reaction temperature and then decrease. The heat-resistance temperature of PHU is 30—40 ℃ higher than traditional polyurethane with analogous structure. The crystallization and thermal stability of crosslinked PHU/SiO2 polymers decrease with the increase of crosslink density. The amorphous SiO2 is homodispersed in the matrix of PHU/SiO2 polymers characterized from X-ray diffraction (XRD) and scanning electron microscope (SEM).Key words：