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采用硬脂酸和乙酸酐对端羟基超支化聚酯的端基进行改性,并将其与端羟基聚丁二烯型聚氨酯(丁羟聚氨酯)形成互穿聚合网络。结果表明,硬脂酸改性超支化聚酯/丁羟聚氨酯互穿聚合物网络的最大强度和最大延伸率均比空白胶片提高了3倍以上,而乙酸酐改性的超支化聚酯与丁羟聚氨酯形成的互穿聚合物网络存在明显的相分离。
The terminal groups of terminal hydroxyl hyperbranched polyesters were modified by stearic acid and acetic anhydride and interpenetrated with hydroxyl-terminated polybutadiene polyurethane (PU). The results showed that the maximum strength and maximum elongation of stearic acid modified hyperbranched polyester / polybutadiene hydroxyapatite interpenetrating polymer networks were more than three times higher than those of blank films. However, acetic anhydride-modified hyperbranched polybutylene terephthalate There is a clear phase separation of the interpenetrating polymer network formed by hydroxy-urethane.