Properties And Preparation On ABS/PP Alloy Composite Filled With Modified Nano-BMC

This thesis proposes a new way of making alloy material ABS/PP through following steps. First, nano-BMC was self-made in lab from industrial bittern by brine and ammonia method. Then BMC was surface-treated by y-MPS. Finally, ABS/PP was obtained by alloying the graft-modified BMC with melt ABS and PP. The main research details and results are as follows:Nano-BMC was self-made in the lab from industrial bittern by brine and ammonia method. Research results indicate that BMC obtained by brine and ammonia method in the laboratorial condition is white power in appearance, loose in macrostructure. In electron microscope its whisker is needle-like, and the length of whisker is 10-20μm, diameter 0.1-1μm, and draw ratio is larger than 30.BMC was first surface-treated by y-MPS with absolute ethyl alcohol as reaction medium. And then BMC took grafting reaction with MMA, with initiator of K2S2O8 (KPS). Research result shows that desired MMA grafting effect can be obtained while the appearance of BMC whisker is preserved by adjusting the reaction condition in the experiment. The grafting effect is best in the condition that ethyl alcohol/water ratio is 8:2, reaction temperature is 82℃, and reaction time is 6h. And whisker appearance of BMC is well preserved (characterized by FT-IR,SEM,XRD), and the grafting effect is fine, with grafting efficiency up to 56.1%.ABS was added with BMC master batch which was made of graft-modified BMC and TPE to study the influence of master batch content and BMC content in master batch on ABS performance. Study shows tensile strength of ABS/BMC composite material increases with BMC content. The best impact performance is achieved when BMC master batch content is 15% and BMC content in master batch is about 55%. And ABS/PP alloy material was obtained by blending melting BMC master batch, ABS, PP and PP-g-MAH together, while keeping the ratio of BMC master batch and ABS constant. The influence of PP content and BMC content on ABS/PP alloy material was studied in the experiment. The result shows tensile strength and impact strength of ABS/PP alloy material are best when PP content is 9%-10%, and BMC filler content contributes little to tensile strength of ABS/PP alloy material, but influences the impact strength in direct proportion. Fondant flowing performance of alloy material is best when PP content is about 10%,. but decreases when BMC content increases.