本研究引入了第二组分-聚乙二醇对其进行改性。peg作为材料的一部分，可以弥补PHB在亲水性、降解性等方面的不足。

We introduce poly (ethylene glycol) (PEG) as a second component to modify PHB. The incorporation of PEG into a PHB matrix can improve the hydrophilicity, flexibility and degradation rate.

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本论文是通过化学接枝的方法，用聚乙二醇及其衍生物对聚氨酯表面进行修饰，研究改性前后聚氨酯表面的血液相容性。

In this study, the surfaces of polyurethane films were modified by poly (ethylene glycol) (PEG) and PEG-derivatives, and blood compatibility of resulting surfaces was investigated.

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本论文是通过化学接枝的方法，用聚乙二醇及其衍生物对聚氨酯表面进行修饰，研究改性前后聚氨酯表面的血液相容性。

In this study, the surfaces of polyurethane films were modified by poly (ethylene glycol) (PEG) and PEG-derivatives, and blood compatibility of resulting surfaces was investigated.

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