Unique Interphase and Cross-Linked Network Controlled by Different Miscible Blocks in Nanostructured Epoxy/Block Copolymer Blends Characterized by Solid-State NMR
Unique Interphase and Cross-Linked Network Controlled by Different Miscible Blocks in Nanostructured Epoxy/Block Copolymer Blends Characterized by Solid-State NMR
复制标题
通过固态 NMR 表征的纳米结构环氧树脂/嵌段共聚物共混物中不同混溶嵌段控制的独特相间和交联网络
DOI：
10.1021/jp5036772
复制
发表时间：
2014-06-19
影响因子：
3.7
通讯作者：
Xue, Gi
中科院分区：
文献类型：
--
作者：
He, Xin;Liu, Yuan;Xue, Gi
A variety of multiscale solid-state NMR techniques were used to characterize the heterogeneous structure and dynamics of the interphase and cross-linked network in nanostructured epoxy resin/block copolymer (ER/BCP) blends, focusing on the role of ER-miscible blocks containing poly(e-caprolactone) (PCL) or poly(ethylene oxide) (PEO) blocks having different intermolecular interactions with ER. 1H spin-diffusion experiments indicate that the interphase thickness of PEO-containing blends is obviously smaller than that of PCL-containing blends. High-resolution 1H fast magic-angle spinning (MAS) spin-exchange experiments reveal detailed interfacial mixing between ER and BCPs for the first time, and two different types of interphase structure are found. 1H fast MAS double-quantum filter experiments provide a fast and convenient detection of interphase composition, including immobilized BCPs and partially cured or local damaged ER network. The driving force for the interphase formation and miscibility in PCL-con...
