Solubility parameters of maleic anhydride-modified propylene-butene copolymer

maleic anhydride;  grafting;  solubility parameters;  molecular polarity;  Polyolefins

The main purpose of grafting maleic anhydride on polyolefin molecules is to increase the polarity of the molecule. After comparing multiple treatment methods, a new two-dimensional method represented by associative force parameters and solubility parameters was proposed to treat the solubility data of propylene butene copolymer modified by maleic anhydride grafting. The associative force parameters of the solvent can be calculated using Hansen’s three-dimensional solubility parameters. It turns out that the shape of the soluble area is an ellipse, and this ellipse can be used to represent the range of polymer solubility parameters. The association force parameters of PPB-MAH can be used to quantify its molecular polarity, and the elliptic equation can be used as a prediction of solvent solubility.