Poly(butadiene-styrene) rubber latexes (SBRL) modified by poly(n-butyl acrylate)(PBA) were used as seeds (SBA)

then SBA/PVC composite resins were prepared through seeded emulsion copolymerization with vinyl chloride monomer.Diameter distributions

morphological structure of the latex particles and morphology of composite materials were characterized with the aid of particle diameter analyzer and transmission electron microscope (TEM).Dynamic mechanical properties of the samples and breaking surfaces’ morphology of the notched bars were determined and characterized via a dynamic mechanical analyzer (DMA) and scanning electron microscope(SEM)

respectively.TEM and particle diameter analysis showed that the PVC was assuredly coated onto the SBA particles

and the SBA/PVC particles presented clearly core-shell morphology.TEM studies indicated that the composite particles of the SBR modified by the PBA were uniformly dispersed in the PVC matrix.DMA results revealed that the SBA/PVC sample showed a weak and extensive glass-transition in low-temperature range.It was suggested that there should be a transition layer of microstructure where the SBA-grafted PVC macromolecules were embedded.The mechanical properties’ research showed that the SBA/PVC composite resin had good impact strength at a low level of the PBA.SEM studies showed that the fractured surface of the composite sample exhibited better toughness than that of the SBR/PVC sample.