Adhesion and thermal properties of rosinamideimide modified with polysiloxane

Rosin maleic anhydride adduct (RMA) was prepared by Diels-Alder reaction of rosin with maleic anhydride. Methylphenylcyclotrisiloxane (D-3(Me,Ph)) was synthesized from methylphenyldichlorosilane in the presence of zinc oxide catalyst, and then polymerized at 90 degrees C for 24 h to obtain amino group terminated polymethylphenylsiloxane prepolymer (APPS). Rosinamideimide was prepared from the polycondensation of RMA with APPS at 120 degrees C for 6 h in the presence of triphenylphosphite catalyst. The structure and thermal properties of the polymer were characterized by FT-IR, NMR(H-1, C-13, Si-29), DSC, and TGA. Rosinamideimide showed good thermal stability and adhesion to aluminum metal substrate. T-g was 259 degrees C, however T-m was not observed. The residual weight (W-tr) at 500 degrees C was 55%, and the adhesion strength was 1.45 MPa.