Provides Administrative /Purchase technology support to PU Administrative Assistants;
为县办行政助理提供行政、采购方面的技术支持和培训;
By mechanical property testing, showing that there is not much changing comparing to PU, the modified PUA still have good mechanical properties.
通过力学性能测试,表明改性后的PUA较PU没有太大的变化,依然具有PU的良好力学性能。
The preparation and the biodegradable properties of the PUs were introduced. It was emphasized that starch is a kind of more desirable additive to PU.
对现行的几种方法作了比较,指出淀粉是一种比较理想的添加剂,由此可制备生物可降解聚氨酯材料。
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