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设计并合成一类含三联苯液晶基元的甲壳型液晶聚乙炔(—{HC C—[(CH2)mOOC-terpheyl-(OC6H13)2]}n—,m=5,PHA5TP(OC6)2;m=9,PHA9TP(OC6)2),研究了聚合物的热稳定性、液晶性能和发光性能,考察了间隔基的长度对其性能的影响.结果表明,三联苯液晶基元赋予单体和聚合物良好的液晶性能,单体均呈现出互变的SmC相,而聚合物具有互变的SmA相.将三联苯以重心位置连接于聚合物主链上形成的甲壳效应,使得聚合物PHA5TP(OC6)2和PHA9TP(OC6)2具有高的热分解温度(Td≥370℃)和良好的发光性能,其光致发光最大发光波长为410 nm.研究还发现,长柔性间隔基更有助于提高聚合物的液晶性能和发光性能.
Design and synthesis of a family of terbium liquid crystal polyacetylene (- {HC C - [(CH2) mOOC-terpheyl- (OC6H13) 2]} n-, m = 5, PHA5TP (OC6) 2; m = 9, PHA9TP (OC6) 2), the thermal stability, the liquid crystal and the luminescent properties of the polymer were investigated, and the influence of the length of the spacer on the properties was investigated. The polymer has good liquid crystal properties, the monomers all exhibit the intermixing SmC phase, and the polymer has the intermixing SmA phase.The terphene effect that the terphenyls are attached to the polymer backbone at the center of gravity makes the polymer PHA5TP (OC6) 2 and PHA9TP (OC6) 2 have high thermal decomposition temperature (Td≥370 ℃) and good luminescence properties, the maximum luminescence wavelength of photoluminescence is 410 nm.The study also found that the long flexible spacer is more helpful To improve the liquid crystal polymer properties and light-emitting properties.