Method of sampling and test for carbonaceous materials used in aluminium manufacture - electrode pitch - determination of mesophase content 制铝工业用炭素材料取样与试验方法.第1部分:电极硬柏油脂.第12节:介晶相含量测定
The synthesis and the effect of the molecular structure on the liquid crystalline property were discussed when the mesogenic unit was grafted on the backbone of cellulose and its derivatives 主要包括其合成方法和刚性介晶基元接枝到纤维素及其衍生物大分子链上以后对其液晶性质的影响及可能的理论解释。
Based on the liquid crystal polymer theory , two kinds of polyacrylates were synthesized by choosing biphenyl group as rigid nucleus of mesophase group and six methylene chain as flexible spacing group . an important chiral additive was synthesized by choosing l ( - ) ~ 2 - octanol as chiral group . mixture was made of the additive and liquid crystalline polymer , which structure was identified by ftit , " ii nmr , dsc and pom 本论文根据液晶分子结构理论，选择联苯基作为介晶基元的刚性核、柔性的六亚甲基脂肪链为柔性间隔基，与丙烯酸反应，合成了两种丙烯酸酯型聚合物；以拆分的l ( - ) 2 -辛醇为手性基团合成了一种液晶手性添加剂，并将所合成的手性添加剂与液晶聚合物共混，采用ftit 、 ~ 1h - nmr 、 dsc 、 pom等手段对合成的化合物、共混物进行了表征。
Side chain polyurethanes with azo group are characterized and confirmed by ftir , uv - vis , dsc , vpo , z - scan , polarize microscope . the results show that the end - group and the flexibility of main chain affects the growing up of liquid crystalline phase greatly . because the determinable way of detection is defective , it was not founded the liquid crystalline behavior obviously contributes to the non1inear optical thection 最后，在分析讨论实验结果的基础上，指出侧链型聚氨酯液晶中侧链介晶基元的末端基团及主链的柔性对其液晶态的形成有重要影响；由于检测手段的不齐备，未能观察到熔致型聚氨酯液晶的液晶行为对其非线性光学效应的贡献作用。
