Synthesis and Characterization of PET-Based Liquid Crystalline Copolyesters Containing 6-Oxynaphthalene-2-carboxylate and 6-Oxyanthracene-2-carboxylate Units
作者:Michael R. Hibbs、Marian Vargas、Jeremy Holtzclaw、Wendy Rich、David M. Collard、David A. Schiraldi
DOI:10.1021/ma034425s
日期:2003.10.1
terephthalate-co-4-oxybenzoate), PET-co-OB. Whereas 40 mol % of the OB unit is required to induce liquid crystallinity in PET-co-OB, only 20 mol % of OA or 30 mol % of ON units are required. This is also in contrast to copolymers containing similar amounts of symmetrical arenedicarboxylate structural units which do not form liquid crystalline phases.
含有6-氧-2-羧基蒽(OA)和6-氧-2-羧基萘(ON)结构单元的聚对苯二甲酸乙二醇酯(PET)的共聚物通过将乙酰氧基芳烃羧酸共聚单体与PET反应性共混来制备。新的共聚物的特征在于1 H和13 C NMR,DSC,稀溶液粘度测定法,光学显微镜,和宽角X-射线衍射,并与聚(对苯二甲酸乙烯共-4-羟苯甲酸酯),PET- CO -OB 。而需要40 mol%的OB单元来诱导PET- co中的液晶性-OB,仅需要20 mol%的OA或30 mol%的ON单元。这也与含有相似量的不形成液晶相的对称的芳构二羧酸酯结构单元的共聚物相反。