摘要
以薄荷醇为手性剂,设计与合成了六种含薄荷基的(甲基)丙烯酯类手性液晶单体(M1～M6),然后再以偶氮二异丁腈为引发剂,将六种单体通过自由基聚合,获得了对应的聚合物(P1～P6),采用FT-IR与1 H-NMR表征了所合成的中间体、单体及其聚合物的化学结构,所获得聚合物的分子量及分布通过了凝胶色谱仪(GPC)的测试分析。此外,采用旋光仪测定了单体与聚合物的旋光度,研究表明:它们均为左旋化合物,其比旋光度绝对值随结构中芳环数或柔性间隔基数的增加而降低,与单体对比,对应聚合物的比旋光度均降低。
Six new chiral （meth）acryalte liquid crystalline monomers （M1 - M6 ） derived from menthol were synthesized. The corresponding polymers （P1 - P6 ） were obtained by means of free radical polymerization of these monomers with azobisisobutyronitrile （AIBN） as an initiator and toluene as a solvent. The chemical structures of the obtained intermediate, monomers and polymers were characterized by FT-IR, or ^1H NMR. The average molecular weight was determined by gel permeation chromatography （GPC）. The specific optical rotations were evaluated with a polarimeter. The experimental results showed that the specific optical rotations of M1 - M6 and P1 - P6 were all left- handed, which indicates that the configuration or rotation direction of these chiral new compounds is hardly affected by a series of chemical reaction. In addition, the specific optical rotation values decreased with increasing the number of phenyl ring or the length of flexible spacer. However, the specific optical rotation absolute values of P1 -P6 were less than those of the corresponding monomers.
出处
《高分子通报》
CAS
CSCD
北大核心
2012年第7期73-78,共6页
Polymer Bulletin
基金
中央高校基本科研业务专项资金项目(No.N090505002)
