For such materials the initial macromolecule tends to be a polyester or polyether; it is the crosslinks that involve the formation of a polyurethane structure.
对于这种材料的初始高分子往往是聚酯或聚醚，它是涉及聚氨酯结构的形成的交联。
Finally, if the ribbons around the equators of the initial drops were narrow, the coalescence resulted in formation of a structure, which could be called a Janus ring.
若最初液滴的形成的赤道带比较拥挤，合并则会形成一个所谓的两面神环。
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