As explained in Chapter 1, the urethane group is the product of the reaction of a hydroxy compound with an isocyanate group (reaction 4.8).
正如第1章解释，聚氨酯组是羟基化合物与异氰酸酯组的反应(反应4.8)的产品。
The authors conclude that this may be due to the interaction between the lanthanide ions and the polar group in urethane.
对该体系的流变行为的研究，进一步证实稀土与聚氨酯间的相互作用的存在。
The authors conclude that this may be due to the interaction between the lanthanide ions and the polar group in urethane.
对该体系的流变行为的研究，进一步证实稀土与聚氨酯间的相互作用的存在。
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