PIPA多元醇制备硬质聚氨酯泡沫

合成了聚氨酯改性聚醚多元醇（PIPA多元醇），采用傅里叶变换红外光谱法、凝胶渗透色谱法等方法对其进行表征，发现聚醚多元醇A（TMN-450）/三乙醇胺/甲苯二异氰酸酯为110/10/9（质量比，下同）时，所合成的PIPA多元醇固含量为15 %左右，黏度约为3 400 mPaos，其作为发泡原料性能较好。采用此多元醇制备硬质聚氨酯泡沫塑料，考察泡沫稳定剂对体系发泡时间、泡沫塑料的泡孔结构、压缩强度、弯曲强度、冲击强度等力学性能的影响，发现加入1.0份泡沫稳定剂的样品泡孔平均直径约为0.5 mm，孔径分布窄，约40 s起泡，与未改性多元醇制备的泡沫塑料相比，冲击强度提高了23 %，压缩强度和弯曲强度略有上升，同时提高了泡沫塑料的强度和韧性。

Preparation of Rigid Polyurethane Foam with PIPA Polyol

Polyisocyanate polyaddition (PIPA) polyol was synthesized and was characterized with Fourier transform infrared spectrometry (FTIR) and gel permeation chromatography (GPC). The optimal recipe was found to be determined as polyol A/TEA/TDI=110/10/9（w）. The rigid polyurethane foam was prepared with PIPA polyol, and the effect of foam stabilizer on the foaming time, cell structure, and mechanical properties like compression, bending and impact strengths of the product were studied. When the content of foam stabilizer was 1.0 pphp, the impact strength was 23% higher than that based on unmodified polyol.