【摘要】 用红外光谱法对基于 4,4′ 二苯基甲烷二异氰酸酯 (MDI)、乙二胺 (ED)和聚己二酸丁二醇酯 (PBA)的嵌段聚酯型聚脲氨酯 (PUU)弹性体及其氘化产物进行了研究。结果表明氘化反应对PUU中涉及氢键化N—H振动红外吸收光谱带的影响较大 ,受氘化影响较大的那些谱带分别在 3 332 ,3 190 ,16 0 0 ,15 39,1317,12 5 7和 12 30cm- 1 附近。另外也发现不同硬段含量和不同聚酯软段分子量的PUU受氘化影响的程度基本相似。更多还原

【Abstract】 Segmented polyester polyurethaneurea (PUU) based on 4,4′-disphenylmethane diisocyanate (MDI),ethylene diamine (ED) and polybutylene adipate (PBA) elastomers and their deuterated polymers were studied by means of IR spectroscopy.The results indicated that IR bands of hydrogen bonded N—H vibrations involved in PUU were greatly affected by deuteration.The bands which were sensentive to deuteration were those near 3 332,3 190,1 600,1 539,1 317,1 257 and 1 230 cm -1 ,respectively.In addition,it was also found that PUU samples with different hard segment contents and polyester soft segment molecule weights were similarly affected by deuteration in degree.更多还原