CAJ | 학술논문

采用聚己二酸丁二醇酯（PBA）和聚四亚甲基醚二醇（PTMG）作为聚氨酯软段，与1，5?萘二异氰酸酯（ NDI）、乙二胺（ EDA）、丁二醇（ BDO）反应合成了PBA?PTMG嵌段聚氨酯弹性体。通过示差扫描量热法分析了不同伸长率下聚氨酯弹性体内部结构及其耐磨性能的变化。结果表明，随着伸长率的增大，聚氨酯中软段相与硬段相间的氢键和C—N化学键发生断裂，降低了软、硬段相间的结合强度；当聚氨酯的伸长率小于10％时，PBA?PTMG嵌段聚氨酯弹性体具有良好的动态耐磨性能。
채용취기이산정이순지（PBA）화취사아갑기미이순（PTMG）작위취안지연단，여1，5?내이이청산지（ NDI）、을이알（ EDA）、정이순（ BDO）반응합성료PBA?PTMG감단취안지탄성체。통과시차소묘량열법분석료불동신장솔하취안지탄성체내부결구급기내마성능적변화。결과표명，수착신장솔적증대，취안지중연단상여경단상간적경건화C—N화학건발생단렬，강저료연、경단상간적결합강도；당취안지적신장솔소우10％시，PBA?PTMG감단취안지탄성체구유량호적동태내마성능。
The polybutylene adipate?polytetramethylene ether glycol ( PBA?PTMG ) block polyurethane elasto?mer was synthesized by PBA and PTMG(as the alternating soft segment), 1,5?naphthalene diisocyanate (NDI), ethylenediamine(EDA) and 1,4?butanediol(BDO). Using different scanning calorimetry, changes in the structure and wear resistance of polyurethane in different elongation was analyzed. Experiments showed that the hydrogen bond and the C—N chemical bond between soft segment phase and hard phase were ruptured with the elongation in?creases,which reduced the binding strength of soft and hard segment. The PBA?PTMG block polyurethane elastomer had excellent dynamic abrasion resistance when the elongation was less than 10%.