聚醚-聚酯混合型聚氨酯微孔弹性体的性能研究  

Performance of Polyurethane Microporous Elastomers Prepared by Blended Polyether-polyester Polyol

作　　者：汪乐春 沙浩鹏 徐强 WANG Lechun;SHA Haopeng;XU Qiang(Shanghai Huide Technology Co.Ltd,Shanghai 201512,China)

机构地区：[1]上海汇得科技股份有限公司,上海201512

出　　处：《聚氨酯工业》2022年第6期35-38,共4页Polyurethane Industry

摘　　要：以聚四氢呋喃二醇(PTMG)、聚己内酯二醇(PCL)、聚四氢呋喃-己内酯共聚二醇(PTM-CL)、1,4-丁二醇、水及催化剂等助剂的混合物作为A组分,以PTMG和4,4′-二苯基甲烷二异氰酸酯(MDI)为原料合成的半预聚体作为B组分,A、B组分按异氰酸酯指数1.0混合后制备微孔聚氨酯弹性体。讨论了在聚醚-聚酯混合体系中PTM-CL用量对微孔弹性体的工艺、泡孔形态、力学性能和低温性能的影响。结果表明,在聚醚-聚酯混合A组分中,PTM-CL的用量增加,PTMG与PCL互溶性增加,体系反应速度加快,制得的微孔聚氨酯弹性体的泡孔更加细腻;当混合低聚物二醇(PEE)中PTM-CL质量分数为40%时,材料拉伸强度和撕裂强度最大;同时PTM-CL的加入提高了微孔弹性体链段的低温柔顺性,当PTM-CL质量分数大于30%时,微孔弹性体的低温柔性较好。A mixture of polytetrahydrofuran diol(PTMG), polycaprolactone diol(PCL),polytetrahydrofuran and caprolactone copolymer diol(PTM-CL), butylene glycol, water and catalysts was used as component A, and a semi-prepolymer synthesized from polytetrahydrofuran diol(PTMG) and 4,4′-Diphenylmethane diisocyanate(MDI) was used as component B. Then the polyurethane microporous elastomers were prepared by mixing components A and B with isocyanate index 1.0. The effects of the amount of PTM-CL in the polyether-polyester hybrid system on the process, bubble morphology, mechanical properties and low-temperature properties of the microporous elastomer were discussed. The results showed that, with the increase of PTM-CL content in the polyether-polyester blend, the mutual solubility of PTMG and PCL increased, the reaction speed of the system was accelerated, and the cells of polyurethane microporous elastomer were more delicate. When the mass fraction of PTM-CL in the mixed oligomeric diol(PEE) was 40%, the tensile strength and tear strength were the maximum. Meanwhile, the addition of PTM-CL improved the low-temperature flexibility of the chain segments of the microporous elastomer. When the PTM-CL mass fraction was more than 30%, the low-temperature flexibility of microporous elastomer was better.

关 键 词：聚氨酯微孔弹性体 聚四氢呋喃二醇(PTMG) 聚己内酯二醇(PCL) 混溶性 低温性能 

分 类 号：TQ333.95[化学工程—橡胶工业]