丙烯酸丁酯/4-乙烯基吡啶共聚物与聚氯乙烯共混相容性的研究

合成了系列丙烯酸丁酯/4-乙烯基吡啶共聚物P(BAVP)].以四氢呋喃为溶剂,用溶剂浇铸法制备了一系列P(BAVP)与聚氯乙烯(PVC)的共混物.动态力学性能测试表明:共混物中吡啶环含量高于1%(摩尔百分含量)的共混物呈均相,即共聚物与PVC相容.P(BAVP)/PVC共混物的T_g随PVC含量和乙烯基吡啶链段含量增加而提高.由红外光谱分析推论出:P(BAVP)分子间的作用力比PBA分子间作用力弱,从而使P(BAVP)与PVC的相容性提高.

Compatibility of Butyl Acrylate-4-vinyl Pyridine Copolymer with Polyvinyl Chloride

The butylacrylate-4-vinyl pyridine copolymers P(BAVP)] with different proportions of 4-vinyl pyridine were synthesized by radical polymerization. A series of mixtures with different proportions of P(DAVP) and PVC were prepared by solvent casting from tetrahydrofuran (THF). Then we assessed their compatibility with dynamical measurements.We found that blends were homogeneous, i. e. these copolymers were miscible with PVC, as long as the content of vinyl pyridlne was more than 1% (molar percent). However, the mixture of polybutyl acrylate (PBA) and PVC was inhomogeneous, which means, these two were immiscible. As the contents of PVC and vingl pyridine sigments in mixture were increasing, the T_g of P(BAVP)/PVC increased. By analyzing the relevant FTIRspectra, we Inferred that the boost of misclbility of P(BAVP) and PVC might due to the fact that the interaction of the P(BAVP) molecules is weaker than that of PBA.