Influence of main-chain and molecular weight on the phase behaviors of side-chain liquid crystalline polymers without the spacer
作者:Ni Bin、Luo Yongbin、Liu Yujie、Chen Sheng、Zhang Hailiang
DOI:10.1039/c5nj01315a
日期:——
series of end-on side-chain liquid crystalline polymers (SCLCPs) based on a biphenyl mesogen, poly(4,4′-alkoxybiphenyl acrylate) (PBiA-m, m = 1, 4, 6, 10, 18), were successfully synthesized by free radical polymerization or reversible addition fragmentation chain transfer (RAFT) polymerization. The chemical structures of the monomers were confirmed by 1H NMR and mass spectrometry. The phase structures and
一系列基于联苯液晶元,聚(4,4'-烷氧基联苯丙烯酸酯)(PBiA- m,m = 1,4,4,6,10,18)的一系列末端侧链液晶聚合物(SCLCP)通过自由基聚合或可逆加成断裂链转移(RAFT)聚合成功合成。单体的化学结构通过1 H NMR和质谱确认。使用DSC,POM和1D WAXD研究了相结构和跃迁行为。实验结果表明,与聚(4,4'-烷氧基联苯甲基丙烯酸甲酯)(PBiMA- m)相比,PBiA- m具有双层近晶相和更高的透明点(T i)。)。此外,具有不同分子量(M n)和低分子量分布的聚(4,4'-己氧基联苯甲基丙烯酸甲酯)(PBiMA-6)和聚(4,4'-己氧基联苯丙烯酸丙烯酸酯)(PBiA-6)已成功开发通过RAFT聚合合成。结果表明,所有聚合物均表现出双层近晶相,并且随着PBiMA-6和PBiA-6的M n的增加,T i增加。此外,PBiA-6具有更高的Ť我与PBiMA-6相