2,4-TDI含量对聚氨酯弹性体性能的影响

摘要

以不同2,4-甲苯二异氰酸酯(2,4-TDI)含量的TDI分别和聚酯二元醇(ODX-218)、聚四亚甲基醚二醇(PTMG)经预聚、3,3'-二氯4,4'-氨基二苯甲烷(MOCA)扩链制备聚氨酯弹性体,讨论了2,4-TDI含量对制品性能的影响.结果表明,在PTMG/TDI/MOCA体系中,TDI中2,4-TDI质量分数在97.5％ ～99.0％之间变化对制品的各项力学性能影响不大,耐磨性能随2,4-TDI含量增加有所提高.在ODX-218/TDI/MOCA体系中,TDI的2,4-TDI质量分数在97.5％ ～98.5％之间制品的综合性能最好.%The polyurethane elastomers( PUE ) were prepared from polyester poyol( ODX-218) or PTMG, chain extender MOCA and TDI which had different 2,4-TDI contents.The influences of 2,4-TDI content on PUE properties were discussed.The result showed that, in the system of PTMG/TDI/MOCA, the different 2,4-TDI contents between 97.5% to 99.0% had little impact on mechanical properties, and the abrasion resistance was increasd with 2,4-TDI contents increasing.In the system of ODX-218/TDI/MOCA, the PUE combination property was the best when 2,4-TDI content was 97.5% to 98.5%.