Synthesis of Hyperbranched Aromatic Poly(amide−imide): Copolymerization of B‘B<sub>2</sub> Monomer with A<sub>2</sub> Monomer
作者:Yao-Te Chang、Ching-Fong Shu
DOI:10.1021/ma021499f
日期:2003.2.1
copolymerization of 4-(3,5-dicarboxyphenoxy)phthalic anhydride, a B‘B2 type monomer, and 1,4-phenylenediamine, an A2 type monomer. The rapid reaction between the anhydride and amino group led to the formation of the dominant imide intermediate which can be regarded as a new AB2 type of monomer. The intermediate, without isolation, was subjected to further polymerization in the presence of TPP/pyridine, as condensing
通过使B'B 2型单体4-(3,5-二羧基苯氧基)邻苯二甲酸酐与A 2型单体1,4-苯二胺共聚制备超支化芳族聚(酰胺-酰亚胺)。酸酐和氨基之间的快速反应导致形成主导的酰亚胺中间体,该中间体可被视为新型的AB 2型单体。中间体未经分离,在作为缩合剂的TPP /吡啶存在下进行进一步聚合,得到含有羧酸链端的超支化聚(酰胺-酰亚胺)。相比之下,AB 2单体是单独制备的,并且还研究了该单体的常规自聚合。所得聚合物的结构通过FTIR和1 H NMR光谱进行表征。光谱数据表明,由两种不同的合成方法制备的这两种聚合物具有几乎相同的结构。超支化聚(酰胺-酰亚胺)的分支度估计为60-61%。通过与多种芳族胺反应来修饰末端羧酸基团,得到相应的酰胺衍生物。链端的性质显示出对超支化聚(酰胺-酰亚胺)的溶解度和T g有显着影响。