蓖麻油型聚氨酯IPN的结构与性能研究

INVESTIGATION ON STRUCTURE AND PROPERTIES OF INTERPENETRATING POLYMER NETWORK BASED ON CASTOR OIL-POLYURETRANES

本文用蓖麻油,甲苯二异氰酸酯和甲基丙烯酸β-羟乙酯组成的加聚型网络(Ⅰ)和蓖麻油,甲苯二异氰酸酯和聚丙二醇组成的缩聚型聚氨酯(Ⅱ),以同步法形成了一组新型的IPN。用动态力学法和固体核磁共振法研究了它们的结构和性能,形成IPN后,力学数据显示出机械强度的提高,动态力学损耗谱上表现出,tanδ的增宽,固体核磁共振谱计算的结果是界面层的比例增高,但界面层比例并不随配比的改变而变化,它揭示出此IPN可能具有壳核结构。

A new series of interpenetrating polymer network based on castor oil, toluene diisocyanate and hydroxyethyl methacrylate (HEMA) (Network I) and castor oil, TDI and polypropylene glycol (PPG) (Network II) was prepared. Their structure and properties were studied by solid NMR and dynamic mechanical analysis. Mechanical and dynamic mechanical measurements show that the tensile properties increase and tan 6 peaks broaden. Solid NMR results indicate that the interface ratio increase but it does not vary with relative amount of network I and network II whtch reveals that the samples might exhibit a core-shell structure.