尼龙6的络合与解络合

为了用超高分子质量尼龙6制备高强高模纤维,对超高分子质量尼龙6分子间的酰胺基氢键的屏蔽和再生进行了研究. 以三氯化镓在硝基甲烷中络合超高分子质量尼龙6以屏蔽氢键,提高拉伸倍数;考察了水、氢氧化钠水溶液和乙醇对络合体系再生的效果;采用XRD、元素分析、DSC以及FTIR法对溶液体系和再生物进行了表征. 结果表明:采用上述方法可以制得无定型三氯化镓-硝基甲烷-超高分子质量尼龙6络合物,超高分子质量尼龙6分子间的氢键被屏蔽,络合物薄膜能拉伸到近20倍;上述3种解络合剂对络合物解络合得到的再生物可以恢复其常规尼龙6的结晶性能.

Complexation and Decomplexation of Nylon 6

Focused on the disruption and regeneration of hydrogen bonds between amides groups of adjacent nylon 6 chains to prepare high strength and high modulus fiber by ultra high molecular weight nylon 6.The gallium chloride dissolved nitromethane was used as complex agent to disrupt the hydrogen bonds between amides groups of adjacent ultra high molecular weight nylon 6 chains and improve the tensile performance.The regeneration effect of complexed polymer in water,sodium hydroxide solution and ethanol,respectively,was studied.X-ray diffraction,elemental analysis,FTIR and DSC were used to characterize the complexation and the regeneration effect.Results showed that the complexation of ultra high molecular weight nylon-6-nitromethane-gallium chloride could be realized by the above methods and the hydrogen bonds could be disrupted so the tensile ratio of the complexed polymer's film could attain to 20 times.Common crystal performance of nylon 6 could be reformed through decomplexation by water,sodium hydroxide solution and ethanol.