In the melt blending process, PB-g-MAH reacts with PA66 through their maleic anhydride groups and the amino end groups, which is confirmed by FTIR and the melt How index.
1] appears indicating the formation of maleimide by the reaction of MAH groups with the amino end groups of PA66 (Fig.
Then during the melt blending process the MAH groups of PB-g-MAH can react with the amino end groups of PA66 and form a new graft polymer PB-g-PA66, as being proved by the FTIR and MFI analysis.
PB-g-MAH promotes the compatibility of PA66/ABS blend and enhances the interfacial adhesion greatly by the entanglement with PB chain in ABS and graft of PA66 through its amino end groups.
Alpha-helices are green cylinders; arrows point from the free amino end to the free carboxyl end.
Beta-pleated sheets (strands) are orange arrows pointing from the free amino end to the free carboxyl end.
In the sequence/alignment viewer, the free amino end is on the left and the free carboxyl end is on the right.