In this article, we have studied the thermal, chemical, and mechanical properties of the polyurethane artificial leather. Polyurethane artificial leathers were made from polyol, diisocyanate, chain extender, a catalyst, polyester circular knitted fabric, and warp knitted fabric. After manufacturing the artificial leathers, the properties of six different samples were investigated according to the NCO index. The equivalence ratios of the isocyanates to polyols containing a hydroxyl group are referred to as the NCO index. Samples were synthesized with an NCO index of 1.0, 1.4, and 1.8 by changing the weight ratio of diisocyanate. The result showed that as the NCO index increased, the unreacted NCO functional groups and cross-link increased and the mechanical properties of the polyurethane artificial leather were increased. The mechanical properties of circular knitted fabric polyurethane artificial leather were superior than warp knitted fabric polyurethane artificial leather.

中文翻译：

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NCO指数和针织面料基材对无溶剂配方聚氨酯人造革的热、化学和机械性能的研究

在本文中，我们研究了聚氨酯人造革的热学、化学和机械性能。聚氨酯人造革由多元醇、二异氰酸酯、扩链剂、催化剂、涤纶圆针织物和经编针织物制成。在制造人造革后，根据 NCO 指数研究了六个不同样品的性能。异氰酸酯与含有羟基的多元醇的当量比称为 NCO 指数。通过改变二异氰酸酯的重量比合成了 NCO 指数为 1.0、1.4 和 1.8 的样品。结果表明，随着NCO指数的增加，未反应的NCO官能团和交联度增加，聚氨酯人造革的力学性能提高。