Study On Structure And Mechanical Of Polypropylene/Poly (Cis-butadiene) Blend.

Different polymer blends under different process condition were prepared through mechanical blending method. DMA had been employed to test the temperature of glass transtion (Tg) of iPP/PcBR alloys in order to study the compatibilisation of the two components. SEM and SALS(Vv) were used to study the alloys phase structure; Additionally, POM, SALS(Hv) and WAXD were used to study the crystallization of iPP/PcBR alloys; What's more, the mechanical of iPP/PcBR alloys was studied, too.The results from the DMA demonstrate that iPP/PcBR alloys were incompatible and the compatibilisation changed little under different process conditions. The results from the phase studied demonstrate that the average diameter and distribution of disperse particles become large with increase the content of disperse phase. In mixing 3 min, the dispersed phase breaks up into smaller pellets and it almost doesn't change with the increase of mixing time. The average diameter of disperse particles reduce at first and then increase suddenly with increasing the blend temperature or rotate speeds.The results from the crystallization studied demonstrate that the dimension of iPP spherulities and the degree of alloys increased with increase the content of iPP. Theβcrystallization appeared from iPP60% to iPP90% and it's content increased with increasing the content of iPP. The interplanar distance and crystallite dimension was affected, too. The dimension of iPP spherulities, the degree of alloys, the content ofβcrystallization, the interplanar distance and crystallite dimension changed much in mixing 2 min, and then become steady. The dimension of iPP spherulities and the degree of alloys reduced with increasing the blend temperature of rotate speeds.The mechanical properties of the alloys were tested and the results showed that the different process conditions affected the tensile properties and impact properties of alloys. The young modulus and yield strength of alloys reduced with increasing the content of PcBR or the blend temperature, however, they increased with increasing the mixing time or the rotate speed. The impact strength of alloys increased with increasing the mixing time, the blend temperature or rotates speed.