The molecule structure of polyvinyl butyral contains large part of OH group
which could be uesed to modify the nonpolartiy of polypropylene. Different structures of polyvinyl butyral (PVB: B-98
B-76 and B-72) were selected to modification impact polypropylene (ICPP) by melt blending method (PVB/ICPP: 5/95). The blend system of PVB/ICPP was studied by SEM
POM
DSC and mechanical properties test. The SEM result confirms that PVB shows party miscibility with ICPP
in which B-98 is the best. The results from POM and DSC show that PVB has a remarkable inhibitory effect on the crystallization rate of ICPP; The results from mechanical tests indicate that the comprehensive mechanical properties of B-98/ICPP are better than B-76/ICPP and B-72/ICPP. The better miscibility of PVB of B-86 with polypropylene is mainly due to its small molecular weight.