SEMI-CRYSTALLINE PROPERTIES AND PHOTOPOLYMERIZATION KINETICS OF MODIFIED DENDRITIC POLY(ETHER-AMIDE)

摘要

The dendritic poly (ether-amide) (DPEA-OH) was modified with octadecyl . isocyanate, toluene-2,4-diisocyanate and β-hydroxylethyl acrylate, producing a UV curable resin with crystalline molecular shell and amorphous interior. The ratio of these modifiers can adjust the products' final properties to fulfil the requirements of UV curable powder coatings. The degree of crystallinity is higher with more crystallizable moieties grafted from the XRD measurements. The crystallizable resins obtained have a T_g of 41- 45℃ and a T_m of around 120℃. Their photopolymerization kinetics was also investigated.