X-ray crystallographic structure of meta- and para-dimethyl ester of pyromellitic acid
文献类型：期刊论文
| 作者 | Huang WX ; Liu TX ; Gao LX ; Zhang X ; Xu JP ; Ding MX |
| 刊名 | chinese journal of polymer science
 |
| 出版日期 | 1997 |
| 卷号 | 15期号:1页码:40-49 |
| 关键词 | AROMATIC POLYIMIDES IMIDIZATION DIANHYDRIDE PRECURSORS |
| ISSN号 | 0256-7679 |
| 中文摘要 | the polycrystalline powder of para- and meta-dimethyl ester of pyromellitic acid (pmde) have been prepared by fractional crystallization, and their crystal structures have been determined by wide-angle x-ray diffraction (waxd). both p-pmde and m-pmde was found to be orthorhombic crystal system, and their unit cell parameters a = 0.840 nm, b = 0.707 nm, c = 1.136 nm and a = 1.032 nm; b = 0.835 nm, c = 0.714 nm, respectively. space group all belongs to p-mmm. p-pmde has two molecules per unit cell with crystal density 1.388 g . cm(-3), while m-pmde has two molecules per unit cell with crystal density 1.522 g . cm(-3). indices of crystal diffraction peaks are also detailed in the present work. the difference in crystal structures between p-pmde and m-pmde has thus been used to explain the curing behavior of isomerically pyromellitic dianhydride-based poly(amic ester)s. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| 公开日期 | 2010-12-22 ; 2011-06-09 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/24429]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Huang WX,Liu TX,Gao LX,et al. X-ray crystallographic structure of meta- and para-dimethyl ester of pyromellitic acid[J]. chinese journal of polymer science,1997,15(1):40-49. |
| APA | Huang WX,Liu TX,Gao LX,Zhang X,Xu JP,&Ding MX.(1997).X-ray crystallographic structure of meta- and para-dimethyl ester of pyromellitic acid.chinese journal of polymer science,15(1),40-49. |
| MLA | Huang WX,et al."X-ray crystallographic structure of meta- and para-dimethyl ester of pyromellitic acid".chinese journal of polymer science 15.1(1997):40-49. |
入库方式： OAI收割
来源：长春应用化学研究所
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