以液体聚硫聚脲齐聚物来增韧环氧-聚酰胺体系，用DMTA和SEM研究了固化后环氧树脂的形态结构、相分离程度和增韧效果。
The measurement of DMTA and SEM was used to study the morphology and structure of the cured epoxy, identifying the degree of phase segregation and the effect of toughening in the cured epoxy.
目前缓释农药制剂的载体材料大部分采用聚脲、聚酰胺、聚氨酯等非降解性材料，又给环境增加了新的问题。
Recently polyurea, polyamide, polyurethane and other non-degradable materials which take up most of carrier materials cause new environmental problems.
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