高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

新型含联萘基团的旋光聚氨酯的制备与性能表征

南秋利, 周钰明, 陈景, 郭玲香, 王志强   

  1. 东南大学化学化工学院, 南京 211189
  • 收稿日期:2006-11-02 修回日期:1900-01-01 出版日期:2007-07-10 发布日期:2007-07-10
  • 通讯作者: 周钰明

Synthesis and Properties of Optically Active Polyurethanes Containing 1,1'-Binaphthyl Unit

NAN Qiu-Li, ZHOU Yu-Ming*, CHEN Jing, GUO Ling-Xiang, WANG Zhi-Qiang   

  1. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
  • Received:2006-11-02 Revised:1900-01-01 Online:2007-07-10 Published:2007-07-10
  • Contact: ZHOU Yu-Ming

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被引次数

10

摘要：

以旋光联萘二酚(BINOL)和甲苯-2,4-二异氰酸酯(TDI)为原料, 采用氢转移加成聚合法制备了含联萘基团的新型旋光聚氨酯(S-BPU和R-BPU), 并用FTIR, 1H NMR, UV-Vis, CD和DSC/TGA等手段对该聚氨酯进行了结构和性能表征. 结果表明, 当BINOL的光学纯度逐渐增加时, BPU的旋光度和特性粘度逐渐增大, S-BPU和R-BPU的旋光度最高可分别达到-78°和＋54.6°, 具有较高的旋光能力; S-BPU和R-BPU的玻璃化转变温度(Tg)分别达到258.4和286.6 ℃, 热分解温度(Td)分别为305.6和323.6 ℃, 热分解温度比通常的PU材料提高了100 ℃ 左右, 显示了较好的热稳定性; R-BPU和S-BPU的红外发射率分别为0.682和0.618, 显示了较低的红外发射率.

关键词: 聚氨酯, 联萘二酚, 氢转移加成聚合, 旋光性

Abstract:

A new type of optically active polyurethanes (R-BPU and S-BPU) containing 1,1'-binaphthyl were prepared from chiral 1,1'-binaphthol(BINOL) and 2,4-toluene diisocyanate(TDI) by the hydrogen transfer addition polymerization. The polymers obtained were characterized with FTIR, 1H NMR, UV-Vis, CD, DSC/TGA and so on. The results showed that in the polymeric process, the intrinsic viscosity and the [α]25D of the optically active polyurethanes obtained increased with the enhancement of the optical purity of the BINOL. And the polymers showed an optical stability, the optically rotation of both of the S-BPU and R-BPU could reach -78.0° and +54.6°(DMF, L=10 cm, c=0.25 g/100 mL). The glass transformation temperatures(Tg) of S-BPU and R-BPU reached 258.4 and 286.6 ℃ respectively, meanwhile the thermal decomposition temperatures(Td) got to 305.6 and 323.6 ℃ and both of whose thermal decomposition temperatures improved more than 100 ℃ according to general PUs. Therefore, the target polymers exhibited good thermal properties, the infrared emissivity reached 0.618 and 0.682, and they displayed a low infrared emissivity.

Key words: Polyurethanes, Binaphthol, Hydrogen transfer addition polymerization, Optical activity

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