Recently,much attention has been paid to photodeformable cross-linked liquid crystal polymers (CLCPs) containing azobenzenes,as the azo-CLCPs can convert light energy to mechanical energy directly.Generally,there are two major methods to prepare azo-CLCPs:the one step method and the two step method.In the former,the CLCPs are usually synthesized in conventional liquid crystal cells through common free radical copolymerization of acrylic monomers and crosslinkers,thus the size and the shape of the acquired CLCPs are limited and well-defined CLCPs are not easily obtained.In the latter,well-defined weak networks are synthesized in the first step,then these networks are stretched unidirectionally to align mesogens and establish order;in the second step,cross-linking reactions fix the network anisotropy.