Synthesis of amorphous copoly(thioether sulfone)s with high refractive indices and high Abbe numbers
Synthesis of amorphous copoly(thioether sulfone)s with high refractive indices and high Abbe numbers
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DOI：
10.1016/j.eurpolymj.2009.09.006
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发表时间：
2010
影响因子：
6
通讯作者：
Suzuki Yasuo;Tomoya Higashihara;S. Ando;M. Ueda
中科院分区：
文献类型：
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作者：
Suzuki Yasuo;Tomoya Higashihara;S. Ando;M. Ueda
通过在聚合物链中同时引入硫化物、砜和脂环单元，合成了一种高折射率、高阿贝数的热塑性无规共聚物(硫醚砜)S。它们是由2，5-二(磺酰甲基)-1，4-二硫杂环已烷(BMMD)和环己烷-1，4-二硫醇(CHDT)与二乙烯基砜(DVS)通过Michael多加成反应合成的。制得了韧性、柔韧性、无色、透明的聚(BMMD/CHDT-DVS)(聚(BMMD/CHDT-DVS))薄膜，在氮气中300℃以上失重率为5%，玻璃化转变温度为42~50℃。差示扫描量热仪证实了薄膜的非晶态特性。与热塑性塑料相比，聚(BMMD/CHDT-DVS)具有较高的折射率和阿贝数，其折射率和阿贝数分别在1.6512-1.6022和42.6-50.6之间。在经验密度预测的辅助下，密度泛函理论计算很好地再现了实验折射率及其波长色散。
New thermoplastic random copoly(thioether sulfone)s with high refractive indices and high Abbe numbers have been developed by the simultaneous introduction of sulfide, sulfone, and alicyclic units in the polymer chains. They were prepared by random copolymerization of 2,5-bis(sulfanylmethyl)-1,4-dithiane (BMMD) and cyclohexane-1,4-dithiol (CHDT) with divinyl sulfone (DVS) based on the Michael polyaddition. Tough, flexible, colorless and transparent copoly(thioether sulfone) (poly(BMMD/CHDT–DVS)) films were obtained, and they showed good thermal stability with the 5% weight-loss at temperatures over 300°C in nitrogen, and the glass transition temperatures of 42–50°C. The inherent amorphous nature of films was confirmed by differential scanning calorimetry. Poly(BMMD/CHDT–DVS) exhibited quite high level of refractive indices and Abbe numbers as thermoplastics, in the range of 1.6512–1.6022 and 42.6–50.6, respectively. The experimental refractive indices and their wavelength dispersions were well reproduced by the DFT calculations with the aid of empirical density prediction.