Abstract: A silane coupling agent 3-methacryloxypropyltrimethoxysilane (KH570) was used to modify multi-walled carbon nanotubes (MWNTs) to graft allyl functional groups on the surface, and in situ polymerization with acrylate monomers was performed to prepare a high temperature-resistant acrylate pressure sensitive adhesive (PSA). The structure and properties of MWNTs and PSA were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The effects of the mass fraction of modified MWNTs on PSA′s heat resistance and adhesive properties were studied. The results show that when the mass fraction of the modified MWNTs is 1.5%, the heat resistance and adhesive properties of the modified PSA are the best. The thermal decomposition temperature increases from 360 to 382 ℃, the heat resistant temperature increases from 80 to 155 ℃, and the initial adhesion, the holding power and the 180° peel increase from ball No.12, 2 h and 13.66 N/25 mm to ball No.17, 27 h and 17.34 N/25 mm, respectively.

Key words: multi-walled carbon nanotubes, surface functionalization, acrylate pressure sensitive adhesive, heat-resistance