聚己内酰胺-锌盐相互作用的研究  

Interaction between Polyamide and Zinc Salt

作　　者：黄保贵[1] 陶栋梁[1] 徐怡庄[1] 王家君[2] 翁诗甫[1] 郭婧[1] 吴瑾光[1] 徐端夫[2] 徐光宪[1] 

机构地区：[1]北京大学化学系 [2]中科院化学所

出　　处：《光谱学与光谱分析》2003年第3期506-508,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金重点项目 (39730 1 60 );面上项目 (2 0 0 2 30 0 5 ;2 990 1 0 0 2 );国家重点基础研究发展规划项目 (G1 9980 61 30 7);科技部973预研 (2 0 0 2CCA0 1 90 0;2 0 0 1DEA2 0 0 2 3B 0 3;2 0 0 1DEA30 0 4 3 0 7)资助。

摘　　要：本文用X 射线衍射和傅里叶变换红外光谱法研究了聚己内酰胺与氯化锌的相互作用。实验结果表明 ,当把聚己内酰胺的甲酸溶液加入饱和氯化锌水溶液 ,沉淀析出物与在纯水中析出的聚己内酰胺有明显的不同。X 射线衍射结果表明在纯水中沉淀析出的聚己内酰胺分子链发生结晶而在饱和氯化锌水溶液中析出的聚己内酰胺却未观察到尖锐衍射峰。红外光谱研究证明 ,在饱和氯化锌水溶液中析出的聚己内酰胺中所含的锌离子与酰胺基团发生相互作用 ,致使酰胺Ⅰ ,Ⅱ带发生巨大变化。酰胺Ⅰ带发生红移证明锌离子与酰胺基团上的羰基发生络合配位 ,这种作用抑制尼龙分子链之间通过CO和N—H基团形成氢键 ,阻碍聚己内酰胺分子的自由运动和整齐堆砌 ,从而使尼龙无法结晶。尼龙与锌盐之间的这种相互作用可能为发展一种尼龙加工制造新方法提供种新的机会。X-ray diffraction and FTIR spectroscopic method have been used to investigate the interaction between the amide group of nylon 6 and zinc chloride. The nylon sample obtained by adding formic acid solution of nylon into aqueous solution saturated by znic chloride is significanty different from the nylon precipitated after mixing formic acid solution of nylon and water. X-ray diffraction results demonstrate that nylon precipitated from water has crystallization while the sample acquired from saturated solution of ZnCl2 remains amorphous. FTIR spectroscopic study shows that the interaction between zinc ion and the amide group of nylon 6 brings about significant variation of amide I and II bands and prevents the crystallization of nylon. The interaction between nylon and zinc ions may be helpful in the development of a new method of manufacturing new nylon material with superior performance.

关 键 词：聚己内酰胺 相互作用 氯化锌 锌离子 酰胺基团 尼龙 X-射线衍射 傅里叶变换红外光谱 

分 类 号：O633.22[理学—高分子化学] O641[理学—化学]