聚α-蒎烯羟基化和聚α-蒎烯大分子单体的聚合性能

Hydroxylation of Poly( α pinene)and Polymerization of Poly( α Pinene) Based Macromonomer

用ＨＣＢｒｏｗｎ硼氢化－氧化反应对聚α－蒎烯环内双键进行羟基化，获得了羟基化结构单元为３３％～５０％的产物。羟基化产物与丙烯酰氯反应，得到了带丙烯酸酯基的聚α－蒎烯大分子单体。大分子单体（平均每条分子链上丙烯酸酯基的数目为２．７）在偶氮二异丁腈引发下进行聚合时，生成交联聚合物，聚合转化率为２０％。在相同条件下与甲基丙烯酸甲酯共聚时，大分子单体的聚合转化率可达６０％。所得聚合物中８７．５％是以甲基丙烯酸甲酯为主链、大分子单体为侧链的接枝共聚物；１２．５％是体型共聚物。

α Pinene polymers were hydroxylated with H C Brown hydroboration oxidation process,to give polymers with 30%～50% hydroxylated repeating units The poly( α pinene) based macromonomer with acrylate groups was also obtained via the reaction of hydroxylated poly( α pinene)and acryloyl chloride Homopolymerization of the macromonomer initiated by AIBN resulted in a cross linked polymer in 20% yield A higher conversion of macromonomer(60%)was achieved in the copolymerization of macromonomer with MMA The obtained polymers contained 12 5% cross linked copolymers and 87 5% graft copolymers with a PMMA main chain and poly( α pinene) based branch chains