新型含联萘基团的旋光聚氨酯的制备与性能表征  

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

作　　者：南秋利[1] 周钰明[1] 陈景[1] 郭玲香[1] 王志强[1] 

机构地区：[1]东南大学化学化工学院,南京211189

出　　处：《高等学校化学学报》2007年第7期1393-1397,共5页Chemical Journal of Chinese Universities

基　　金：江苏省"六大人才高峰"人才支持计划(批准号:06-A-033);教育部新世纪优秀人才支持计划(批准号:NCET-04-0482);国家自然科学基金(批准号:50377005)资助

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.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] D^25 of the optically act/re 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.

关 键 词：聚氨酯 联萘二酚 氢转移加成聚合 旋光性 

分 类 号：O632.7[理学—高分子化学]