聚氨酯是由异氰酸酯与多元醇反应制成的一种具有氨基甲酸酯链段重复结构单元的聚合物。
PU is a polymer with urethane segment repetitive structure unit formed after the reaction of TDI and PPG.
它与传统高分子相比分子中都含有重复的结构单元，但性质却表现出了很大的差异。
As compared with the traditional "macromolecular, they all consist of the same structural units, but it shows to be very different in properties."
它与传统高分子相比分子中都含有重复的结构单元，但性质却表现出了很大的差异。
As compared with the traditional "macromolecular, they all consist of the same structural units, but it shows to be very different in properties."
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