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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of hyperbranched polyester-amides and their application as crosslinkers for polyurethane curing systems
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Synthesis of hyperbranched polyester-amides and their application as crosslinkers for polyurethane curing systems

机译：超支化聚酯酰胺的合成及其在聚氨酯固化体系中的交联剂应用

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摘要

A series of hyperbranched polyester-amides (S1, S2, S3) with trimethylolpropane as a core molecule were synthesized using core-dilution/slow monomer addition strategy. The products were characterized by FTIR, 13C NMR, GPC, TGA, hydroxyl value measurement, and viscosity measurement. The result showed that the hyperbranched polyester-amides synthesized had narrow molecular weight distribution and high degree of branching (DB). The hyperbranched polyester-amides synthesized were used as crosslinkers for polyurethane curing systems and the mechanical properties of the polyurethane curing systems were investigated. It was found that the best tensile property and tear strength were obtained when the S2 were used as crosslinkers and the molar ratio of -OH and -NCO was 1: 1. It was also found that the polyurethane curing systems had the highest hardness and T_g when the S3 were used as crosslinkers.
机译：采用核心稀释/慢速单体添加策略合成了一系列以三羟甲基丙烷为核心分子的超支化聚酯酰胺（S1，S2，S3）。通过FTIR，13 C NMR，GPC，TGA，羟值测量和粘度测量来表征产物。结果表明，合成的超支化聚酯酰胺分子量分布窄，支化度高。将合成的超支化聚酯-酰胺用作聚氨酯固化体系的交联剂，并研究了聚氨酯固化体系的机械性能。发现当将S2用作交联剂并且-OH和-NCO的摩尔比为1：1时，获得了最佳的拉伸性能和撕裂强度。还发现聚氨酯固化体系具有最高的硬度和T_g。当S3用作交联剂时。

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