蓖麻油聚氨酯基网状聚合物的动态力学性质

DYNAMIC MECHANICAL PROPERTIES OF POLYMER NETWORKS BASED ON CASTOR OIL POLYURETHANE

研究了蓖麻油聚氨酯基AB型交联聚合物(ABCP)及同步法合成互穿聚合物网络(IPN)的动态力学谱。ABCP的两组分近似互容,在动态力学谱上呈现出单一T_g松弛,用透射电子显微镜观察,聚氨酯相区尺寸小于 2 nm;而其化学组成相同的 IPN则呈现出两相结构,其动态力学谱上有两个 T_g松弛,两组分间虽有链段互穿,但其相容性仍次于 ABCP。

The synthesis and dynamic mechanical properties of AB crosslinked Polymer(ABCP) and simultaneous interpenetrating polymer networks (IPN) based on castor oil polyurethane were studied. The results show that ABCP has a single Tg relaxation on the dynamic mechanical spectrum, and the dimension of castor oil polyurethane domains is less than 2 nm. Therefore, the two components in ABCP are nearly compatible. While IPN which has the identical chemical composition with ABCP described above has two Tg relaxations o...