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设计合成了三种具有不同主链化学结构的二阶非线性光学功能化环氧聚合物，并对其化学结构进行了表征，考察了聚合物近程结构对材料极化后二次谐波产生弛豫特性的影响。极化后线型聚合物链节的扭转弹性回复是二次谐波产生弛豫的主要原因，在温度处于Ｔｇ 以下或Ｔｇ 附近时玻璃化转变温度的高低决定了二次谐波产生弛豫的快慢；聚合物交联后有助于提高二次谐波产生的稳定性，但此时聚合物单个链节结构的柔顺性成为影响二次谐波产生弛豫的主要原因，刚性越大，材料将具有更稳定的二次谐波产生性能。极化聚合物的二次谐波产生弛豫过程非常复杂，需要综合考虑聚合物材料的近程和远程结构因素。
Three kinds of second-order nonlinear optically functionalized epoxy polymers with different main chain chemical structures were designed and synthesized. Their chemical structures were characterized. The effects of polymer short-range structure on the second harmonic generation Effect of relaxation characteristics. The torsional elastic recovery of the linear polymer chain links is the main reason for the relaxation of the second harmonic. The glass transition temperature at or below Tg determines the relaxation of the second harmonic Fast and slow; polymer cross-linked help to improve the stability of the second harmonic generation, but at this time the flexibility of the polymer structure of a single link has become the main reason for the second harmonic relaxation, the greater the rigidity, the material Will have more stable second harmonic generation performance. The relaxation process of the second harmonic generation of polarized polymers is very complicated and needs to take into account the short-range and long-range structural factors of the polymer material.