Influence of alkoxy tail length on the phase behaviour of mesogen-jacketed liquid crystalline polymers with fan-shaped pendants
作者:Chang-An Yang、Guo Wang、He Lou Xie、Hai Liang Zhang
DOI:10.1016/j.polymer.2010.08.007
日期:2010.9
synthesized. Then, their corresponding polymers P-tri-OCmH2m + 1 (m = 1, 2, 4, 6, 8, 10, 12) were synthesized by free radical polymerization. The chemical structure of the monomers was confirmed by elemental analysis, 1H NMR and 13C NMR. The molecular characterization of polymers was performed with 1H NMR, gel permeation chromatography (GPC). The thermal stability of polymers was investigated by thermogravimetric
一系列2、5-双[[3、4、5-三烷氧基苄基)氧羰基]苯乙烯的新单体(表示为M-tri-OC m H 2m + 1,m = 1,2,4,4,6,8 ,10、12,其中m表示烷氧基中的碳原子数)被设计并合成。然后, 通过自由基聚合合成它们相应的聚合物P-tri-OC m H 2m +1(m = 1、2、4、6、8、10、12)。单体的化学结构通过元素分析,1 H NMR和13 C NMR确认。用1对聚合物进行分子表征1 H NMR,凝胶渗透色谱法(GPC)。通过热重分析(TGA)研究了聚合物的热稳定性。使用差示扫描量热法(DSC),偏振光显微镜(PLM),一维和二维(一维和二维)广角X射线衍射(WAXD)研究了相结构和跃迁行为。我们发现,P-三OC米ħ 2米 + 1(米 短= 1,2)ñ -烷氧基的取代基的尾部形式柱状向列型(Φ Ñ)相; 与烷氧基尾部的增加的长度,P-三OC米ħ 2米 +