| 초록 |
Dimer-acid based polyamide (DAPA) is one of popular hot melt adhesives for packaging, book binding and inks. For the improvement of adhesive strength to different substrate, we have investigated chemical modifications via graft copolymerization with olefinic resin. Graft coplymerization of DAPA were carried out through the reaction of maleated olefinic resin with amine group of DAPA (Ⅰ) or radical reactions (Ⅱ) of double bonds in the olefinic resin and DAPA. It was found that the modified DAPA by the radical reactions (Ⅱ) showed excellent adhesions and relatively low viscosity. On the other hand, the modified DAPA by the reaction of maleated olefinic resin (Ⅰ) have advantage of excellent mechanical properties while the viscosity of the modified DAPA was relatively high. Structure-property relationships of the DAPA based graft copolymer were studied based on the tensile properties, melt viscosities, thermal properties, and adhesion properties of the modified DAPA. |
