Nanostructures and nanoporosity in thermoset epoxy blends with an amphiphilic polyisoprene-block-poly(4-vinyl pyridine) reactive diblock copolymer |
| |
Authors: | Qipeng Guo Jing Liu Ke Wang |
| |
Affiliation: | a Centre for Material and Fibre Innovation, Deakin University, Pigdons Road, Geelong, Victoria 3217, Australia b Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602, Singapore |
| |
Abstract: | Nanostructured thermoset blends were prepared based on a bisphenol A-type epoxy resin and an amphiphilic reactive diblock copolymer, namely polyisoprene-block-poly(4-vinyl pyridine) (PI-P4VP). Infrared spectra revealed that the P4VP block of the diblock copolymer reacted with the epoxy monomer. However, the non-reactive hydrophobic PI block of the diblock copolymer formed a separate microphase on the nanoscale. Ozone treatment was used to create nanoporosity in nanostructured epoxy/PI-P4VP blends via selective removal of the PI microphase and lead to nanoporous epoxy thermosets; disordered nanopores with the average diameter of about 60 nm were uniformly distributed in the blend with 50 wt% PI-P4VP. Multi-scale phase separation with a distinctly different morphology was observed at the air/sample interface due to the interfacial effects, whereas only uniform microphase separated morphology at the nanoscale was found in the bulk of the blend. |
| |
Keywords: | Nanoporous epoxy Thermoset blend Block copolymer |
本文献已被 ScienceDirect 等数据库收录! |
|