电场对聚肽液晶相行为的影响  

EFFECT OF ELECTRIC FIELD ON PHASE BEHAVIOR OF POLYPEPTIDE LIQUID CRYSTALS

作　　者：陈涛[1] 林嘉平[1] 田晓慧[1] 刘培海[2] 林绍梁[1] 鲁习文[2] 周达飞[1] 

机构地区：[1]华东理工大学高分子材料系,上海200237 [2]华东理工大学应用数学系,上海200237

出　　处：《高分子学报》2004年第1期145-148,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目(基金号 50 2 73 0 11);教育部博士点基金资助项目 (基金号 2 0 0 10 2 510 0 8)

摘　　要：Phase transitions of polymer liquid crystals may be i nduced not only by changes of temperature or polymer concentration,but also b y external electric,magnetic or other orientational fields.In this paper the pha se behavior of polypeptide liquid crystal solutions,such as PBLG/TCE and PBLG/CH Cl 3/TFA solutions,was studied in the presence of an external electric field.It was found that the liquid crystal phase was stabilized when the external electr ical field was applied and the area of liquid crystal phase was broadened.Qualit atively,the experimental results are in good agreement with the theoretical resu lts calculated by a lattice model previously.The information obtained may be use d to develop new routes for processing rigid flexible block copolymers with be tter mechanical properties and to construct molecular devices for processing and storing information.Phase transitions of polymer liquid crystals may be i nduced not only by changes of temperature or polymer concentration,but also b y external electric,magnetic or other orientational fields.In this paper the pha se behavior of polypeptide liquid crystal solutions,such as PBLG/TCE and PBLG/CH Cl 3/TFA solutions,was studied in the presence of an external electric field.It was found that the liquid crystal phase was stabilized when the external electr ical field was applied and the area of liquid crystal phase was broadened.Qualit atively,the experimental results are in good agreement with the theoretical resu lts calculated by a lattice model previously.The information obtained may be use d to develop new routes for processing rigid flexible block copolymers with be tter mechanical properties and to construct molecular devices for processing and storing information.

关 键 词：电场 聚肽 相行为 聚合物液晶 相转变 分子链构象 

分 类 号：O753.2[理学—晶体学]