Linear polybenzyls of high molecular weight and high crystallinity suitable for use in films or moulding compositions are obtained by polymerizing aralkyl halides in the presence of a Friedel-Crafts catalyst complexed with a nitroarene or a nitroalkane complexing agent in a halogenated solvent. The complex catalyst allows the polymerization to be run at higher rates. The polymerizable a-alkyl-benzyl halides which can be readily employed are represented by the following structural formula:
wherein R1 is a C1-C4 alkyl group, R2 and R3 are the same or different and are each selected from the group consisting of I hydrogen and C1-C4 alkyl groups, and X is halogen.
在弗里德尔-卡夫斯催化剂与硝基烯烃或硝基
烷烃络合剂络合的情况下,在卤化溶剂中使芳基卤化物聚合,可获得适用于薄膜或模塑组合物的高分子量和高结晶度的线性聚苄基烯烃。 络合催化剂可使聚合反应以更高的速率进行。 可聚合的 a-烷基-苄基卤化物可用以下结构式表示: 其中 R1 是 C1-C4 烷基,R2 和 R3 相同或不同,且各自选自氢和 C1-C4 烷基组成的组,X 是卤素。