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How to synthesize polymer liquid crystals in silicone hoses and make them into silicone hoses

Synthesis method of polymer liquid crystal in silicone hose How to make silicone tube
(1) Use hydrogen-containing silicone polymer in silicone hose to synthesize side chain type silicone polymer liquid crystal The siloxane addition reaction of oxane to prepare polysiloxane liquid crystal is the most widely used method at home and abroad. The first organosilicon liquid crystal reported by Finkelmann was synthesized by this method. Therefore, many products in silicone rubber products are This process is extracted, and extruded products such as silicone tubes and silicone hoses are also processed in this way.
 
The success of this method of synthesis of silicone liquid crystals in silicone tubes has undoubtedly created conditions for the study of the relationship between the structure and performance of silicone liquid crystals. Different workers use the method of silicon hydrogen addition to select organopolysiloxanes with different silicon hydrogen content Thousands of polysiloxane liquid crystals were synthesized using alkanes and mesogens as raw materials, and the concentration of mesogens in siloxane in silicone hoses, molecular weight, different mesogens, and mesogens were also studied. The connection mode between the crystal group and the silicone main chain, the flexibility and length of the spacer, the polarity and length of the tail group, and the chemical structure of the mesogens affect the phase transition behavior of polysiloxane liquid crystals, Liquid crystal texture, liquid crystal photoelectricity and other physical properties have been extensively studied, and these performance studies have laid a solid foundation for the application and development of silicone hoses and silicone liquid crystals. This method is also used in the reaction of other silicone tubes containing silicon backbone polymers. In 1993, Bialecka Florjanczyk et al. reported that polysilicane was obtained by ring-opening polymerization of 1,1,3.3-tetramethyl-1,3-disilacyclobutane, which was reduced to hydrogen-containing polysilicane and combined with mediated The terminal alkenes of the crystal units undergo hydrosilylation to obtain polysilicane liquid crystals.






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