节点文献
多检测GPC/SEC技术在高分子表征中的应用 Ⅲ.新型聚炔类梳形液晶高分子
Use of Multiple Detectors GPC/SEC in Polymer Characterization Ⅲ. Novel Liquid Crystalline Polymer
【摘要】 采用体积排斥色谱法/ 示差折光指数/ 直角激光光散射/ 示差粘度三检测联用技术表征聚炔类梳形液晶高分子,阐述了在溶液中分子尺寸与结构的关系,计算了无扰尺寸( < r20 > / M)1/2 和Flory 特征比C∞,讨论了侧基的柔性和体积对主链柔性程度的影响。
【Abstract】 Novel liquid crystalline polymers of polyacetylenes with comb structure were studied by SEC/RI/RALLS/DV. The relationship between the molecular size and the polymer structure was formulated, and the theta condition of two samples was obtained. Flory′s characteristic ratios C ∞ and unperturbed dimensions (<r 2 0>/M) 1/2 were calculated. The effect of the side group size on chain flexibility was discussed. The results show that the technique of SEC/RI/RALLS/DV is a useful means for characterizing the novel liquid crystalline polymer of polyacetylenes with comb structure, which can not be effectively characterized by conventional SEC.
【Key words】 multi detector SEC; characterization; liquid crystalline polymer; comb structure; Flory′s characteristic ratio C ∞;
- 【文献出处】 功能高分子学报 ,JOURNAL OF FUNCTIONAL POLYMERS , 编辑部邮箱 ,1999年04期
- 【分类号】O631
- 【被引频次】2
- 【下载频次】187