Sandwich layer structure of a novel polyimide with methylene spacing groups in biphenyl side chain

Sandwich layer structure of a novel polyimide with methylene spacing groups in biphenyl side chain
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联苯侧链带有亚甲基间隔基团的新型聚酰亚胺的夹层结构

DOI:
10.1016/j.eurpolymj.2008.08.040
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发表时间:
2008-11
影响因子:
6
通讯作者:
--
中科院分区:
化学2区
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--
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采用偏光显微镜(POM)、宽/小角x射线衍射(WAXD/SAXD)和分子模拟方法研究了联苯侧链上具有6个亚甲基柔性间距基团的新型聚酰亚胺(PI-6)的聚集结构。随着温度的升高,PI-6的夹层聚集结构由热可逆凝胶发展而来。骨架为层状堆积,厚度为11.5Å。侧链随机填充到主链层间,主链和侧链的层间宽度均约为23.1Å,与模拟结果一致。
The aggregation structure of a novel polyimide (PI-6) with six methylene flexible spacing groups in biphenyl side chain was investigated using polarized optical microscope (POM), wide/small-angle X-ray diffraction (WAXD/SAXD) and molecular simulation approach. Depending on increasing temperature, the sandwich layer aggregation structure of PI-6 was developed from the thermo reversible gel. The backbones are lamellar stacking with 11.5Å thickness. The side chains are randomly packed into the backbone lamellar intervals and the width of this layer for both backbone and side chain is about 23.1Å which is consistent with the simulation data.
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