中文摘要：

采用熔融共混法制备了聚偏氟乙烯/乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯共聚物（PVDF/PTW）共混物,利用流变仪考察了PVDF/PTW共混物的相互作用及两者的相容性.观察共混物在200℃下的流变曲线,发现在低频区,共混物中PTW含量越大,共混物的流变曲线越偏离经典流变理论,这个结果与cole-cole图相一致.通过时温叠加原理（时温等效主曲线、Han曲线和v GP曲线）系统研究了不同组成的PVDF/PTW共混体系在均相区和相分离区的黏弹行为.结果表明,在均相区,不同温度下,共混体系的动态模量利用时温叠加原理,通过水平位移就可以很好地叠加在一起,无论是储能模量还是损耗模量,在低频末端均近似地符合经典低频末端标度关系;在相分离区,动态模量偏离了经典的低频末端标度关系,其中储能模量的偏离尤为明显,从而导致了时温叠加原理的＂失效＂,相应的Han图、v GP图也表现出不同于均相体系的特征,这些特征的响应可以用来表征共混体系的相容性,表明在研究的一系列配比（PVDF/PTW 100/0、90/10、70/30、50/50、30/70、10/90、0/100,W/W）中,当PVDF/PTW=90/10（W/W）时,两者的相容性较好.SEM也证实了这个结论.

英文摘要：

PVDF/PTW blends were directly prepared by melt blending and the phase behavior of PVDF/PTW blends was expored by using the dynamic rheology and scanning electron microscopy（ SEM）. As was shown in the plot of dynamic modulus versus frequency for PVDF/PTW blends at 200 ℃,with increasing the content of PTW,the rheological behavior of the PVDF/PTW blends at low frequency deviated from the classical rheological theory,which was corresponding to cole-cole curves of PVDF/PTW blends at 200 ℃. The viscoelastic properties of PVDF/PTW blends were systematically investigated by using master curves of blends obtained from time-temperature superposition（ t TS） principle,Han plots and v GP plots. The results showed that t TS principle worked well for PVDF/PTW blends in homogeneous region. On the other hand,in the phaseseparated region,the viscoelastic properties of PVDF/PTW blends were different from characteristic thermorheological responses,especially for the characteristic deviations of the storage modulus at low frequencies,and the Han plots and v GP plots also showed the different shapes corresponding to the homogeneous system. These results showed that PVDF/PTW（ PVDF/PTW = 90 /10）（ W/W） blend had better miscibility than the others and it was also confirmed by SEM.