刚性链芳香聚酰胺片晶结构  

LAMELLAR STRUCTURE OF RIGID AROMATIC POLYAMIDE

作　　者：陈寿羲[1] 金永泽[1] 

机构地区：[1]中国科学院化学研究所

出　　处：《高分子学报》1995年第2期212-216,共5页Acta Polymerica Sinica

基　　金：国家基础性重大关键项目

摘　　要：应用透射电子显微术直接观察了刚性链芳香聚酰胺结晶取向膜的结晶形态结构．结果表明了，在聚对苯二甲酰对苯二胺（ＰＰＴＡ）和聚对苯甲酰胺（ＰＢＡ）的结晶取向膜中均存在有片晶结构．片晶的厚度对ＰＰＴＡ为２０ｎｍ；而对ＰＢＡ为４０ｎｍ，其大小恰好分别与该高聚物分子链的相关长度相当．最后提出一伸直链构象的结构模型来描述这类刚性链高聚物形成片晶结构的分子链堆砌排列方式．The lamellar structure in the oriented films with and without bandedtexture of a lyotropic aromatic polyamide sheared from the anisotropic solutions hasbeen investigated by mean of'transmission electron microscopy. The lamellar structure of 20 urn in thickness for poly (1,4-phenylene terephthalamide) (PPTA) and of40 urn in thickness for poly (1,4-benzamide) (PBA) was observed. These periodicities of lamellar structure are corresponding to the persistance length of both polymers. The molecular chain is only in extended comformation for these rigid polymers. A model was suggested to describe the packing arrangement of the molecularchain in the crystalline region of the rigid polymers.

关 键 词：片晶结构 刚性链 高聚物 PPTA PBA 

分 类 号：O633.22[理学—高分子化学] O631.13[理学—化学]