Liu Jing-Ru, Chao Ling-Ling, Yu Qiang, Zhu Meng-Bing, Gu Chun-Miao
School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Apr;31(4):983-7.
In order to enhance the mechanical properties of polyethylene glycol (PEG) polyurethane elastomer, the modified hyperbranched polyester (HBP) was introduced. The chemical structures of HBP/PEG polyurethane films were analyzed by attenuated total reflection-Fourier transfoum infrared spectrum (ATR-FTIR). The results indicate that with the modified hyperbranched polyester added, the tensile strength and elongation at break of PEG polyurethane elastomer are improved obviously. When the content of hyperbranched polyester of the third generation is 0.4%, the resultant elastomer has the best tensile strength, which increases 2.53 times. When the content of hyperbranched polyester of the first generation rises up to 1.6%, the resultant elastomer has the best elongation at break, which increases 1.43 times. The degree of the total hydrogen bonding and the degree of microphase separation are increased, which enhance the mechanical properties of PEG polyurethane elastomer.
为了提高聚乙二醇（PEG）聚氨酯弹性体的力学性能，引入了改性超支化聚酯（HBP）。通过衰减全反射傅里叶变换红外光谱（ATR-FTIR）分析了HBP/PEG聚氨酯薄膜的化学结构。结果表明，添加改性超支化聚酯后，PEG聚氨酯弹性体的拉伸强度和断裂伸长率明显提高。当第三代超支化聚酯的含量为0.4%时，所得弹性体具有最佳的拉伸强度，提高了2.53倍。当第一代超支化聚酯的含量升至1.6%时，所得弹性体具有最佳的断裂伸长率，提高了1.43倍。总氢键程度和微相分离程度增加，从而提高了PEG聚氨酯弹性体的力学性能。
