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用碳酸钠作缚酸剂制备出含硫聚醚型侧链液晶聚合物——聚[1-({(4-甲氧基偶氮苯-4′-氧)烷基}硫醚)-2.3-环氧氯丙烷](POnM),其中亚甲基数(n)为3,4,5。所制备聚合物的结构由核磁共振(1H NMR)测试确定,其液晶性能由示差扫描量热法(DSC)及偏光观察进行研究。结果表明:聚合物的取代度随亚甲基的增大而减小,PO3M的取代度为89%,呈液晶性,为相列相;PO4M取代度为61%显很弱液晶性;PO5M的取代度为42%,不表现出液晶性。聚合物PO3M、PO4M的分解温度分别为300、260℃左右。
Sulfated polyether side chain liquid crystal polymer - poly [1 - ({(4-methoxyazobenzene-4’-oxy) alkyl} thioether) -2.3 - epichlorohydrin] (POnM) in which the number of methylene groups (n) is 3, 4, 5. The structure of the prepared polymer was confirmed by 1H nuclear magnetic resonance (1H NMR) measurement. The liquid crystal properties were investigated by differential scanning calorimetry (DSC) and polarized light observation. The results showed that the degree of substitution of the polymer decreased with the increase of methylene group. The degree of substitution of PO3M was 89%, which was in liquid phase and the phase was in phase. The degree of PO4M substitution was 61% The degree of substitution is 42%, showing no liquid crystallinity. The decomposition temperatures of PO3M and PO4M were about 300 and 260 ℃, respectively.