Cationic polymerization of trioxane and a mixture of α,α- and α,β-isomers of glycerol formal (or their ester derivatives) yields acetal terpolymers having pendant functional groups (i.e., hydroxyl or ester groups pendent from the polymer's backbone). The glycerol formal monomers employed in this invention may include functional groups selected from hydroxyl or ester moieties which are protected from, and thus survive, the polymerization process with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block polymers and/or to chemically bind modifiers to the acetal terpolymer backbone, for example.
三氧杂
环己烷与α,α-和α,β-异构体的
甘油醛(或其酯衍
生物)混合物进行阳离子聚合,可得到具有悬垂官能团(即从聚合物骨架上悬垂下来的羟基或酯基)的
缩醛三元共聚物。本发明中使用的
甘油醛单体可包括从羟基或酯分子中选出的官能团,这些官能团在与三氧
乙烷的聚合过程中受到保护,因此可以存活下来。这些基团可作为功能性反应位点,用于随后合成嵌段聚合物和/或将改性剂与
缩醛三元共聚物主链等
化学结合。