羧基碳纳米管对尼龙1010与乙烯-醋酸乙烯酯橡胶酯-酰胺交换反应的影响

Effect of Carboxylic Carbon Nanotubes on the Ester-amide Exchange Reaction between Nylon 1010 and EVM Rubber

研究了羧基碳纳米管（CNT—C00H）对尼龙1010与乙烯-醋酸乙烯酯共聚物的酯-酰胺交换反应的影响。采用核磁共振氢谱（1HNMR），透射电子显微镜（TEM）研究了羧基碳纳米管对反应程度的影响以及作用机理。采用差示扫描量热法（DSC）研究了CNT—COOH的加入对共混物热性能的影响。结果表明，CNT—C00H对酯一酰胺交换反应有催化作用，将CNT—COOH的质量分数从0％提高到3％，反应程度从0．052提高到0．083。CNT—COOH主要分布在尼龙相和界面上，CNT—COOH的加入提高了尼龙的结晶温度，起到了成核剂的作用。

The effect of carboxylic carbon nanotubes on the ester-amide exchange reaction of nylon 1010/ ethylene-vinyl acetate rubber （EVM） blends was studied. Proton-nuclear magnetic resonance （1H NMR） and transmission electron microscopy （TEM） were used to analyse the effect of carboxylic carbon nanotubes （CNTs-COOH） on the reaction extent and the catalytic mechanism. Differential scanning calorimeter （DSC） was used to study the effect of CNTs-COOH on the thermal properties of the blends. The results show that the CNTs-COOH in the composites could promote the ester-amide exchange reaction and the reaction extent increases from 0. 052 to 0. 083 with increasing CNTs-COOH content from 0wt% to 3wt%. TEM images show that the carbon nanotubes are mainly distributed in nylon phase and the interface of the two phases. And the addition of CNTs-COOH could evaluate the crystallization temperature and CNTs-COOH acts as a nuclear agent in the blends.