Thermotropic and lyotropic liquid crystallinity of main-chain polysilane and polysiloxane(including linear,ring and ladder structure )were reviewed with 19 references.

• 综述了主链液晶聚硅烷和主链液晶聚硅氧烷（包括线型、环形和梯形结构）的热致和溶致液晶行为。