Abstract In this contribution, we reported the investigation of epoxy toughening via the formation of nanostructures by the use of poly(e-caprolactone)-block-polyisoprene (PCL-b-PI) diblock copolymer. The novel diblock copolymer was synthesized via the combination of ring-opening polymerization and reversible addition-fragmentation chain transfer polymerizations. This diblock copolymer can be used to access the nanostructures of epoxy thermosets. Transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS) showed that the nanostructured thermosets were successfully obtained. In the nanostructured thermosets, the spherical or vesicular polyisoprene microdomains were dispersed in continuous epoxy matrix. It is the formation of the PI nanophases that endowed the thermosets with significantly improved fracture toughness.

中文翻译：

---

通过与两亲性二嵌段共聚物形成聚异戊二烯纳米相的环氧树脂增韧

摘要 在这篇文章中，我们报道了通过使用聚（ε-己内酯）-嵌段-聚异戊二烯（PCL-b-PI）二嵌段共聚物形成纳米结构对环氧树脂增韧的研究。新型二嵌段共聚物是通过开环聚合和可逆加成-断裂链转移聚合的组合合成的。这种二嵌段共聚物可用于获得环氧树脂热固性材料的纳米结构。透射电子显微镜 (TEM) 和小角 X 射线散射 (SAXS) 表明成功获得了纳米结构的热固性材料。在纳米结构的热固性材料中，球形或囊状聚异戊二烯微区分散在连续的环氧树脂基质中。正是 PI 纳米相的形成赋予了热固性材料显着提高的断裂韧性。