虽然用阴离子引发可以得到接近单分散线型聚苯乙烯,但还没有人能合成具有α-苯基乙基端基的聚苯乙烯。对低分子量聚合物来说,端基可以影响某些物理性能例如粘度,玻璃化温度,熔体粘度。一个“理想”结构的聚苯乙烯分子的两端,应该都是氢原子,只有当引发剂中终止部分是一个质子才有可能达到这目的。 While anionic initiators can result in nearly monodisperse polystyrene, no one can synthesize polystyrenes with alpha-phenylethyl end groups. For low molecular weight polymers, the end groups can affect certain physical properties such as viscosity, glass transition temperature, melt viscosity. The polystyrene molecules of an “ideal” structure should have hydrogen atoms at both ends, and this may be possible only if the terminator in the initiator is a proton.