Abstract
A novel core-shell-structured carboxylated-styrene butadiene rubber (XSBR)-functionalized nanodiamond (ND-XSBR) was synthesized and characterized. Epoxy (EP) nanocomposites toughened by pristine ND and ND-XSBR were investigated and compared. The ND-XSBR-reinforced nanocomposite exhibited mechanical properties superior to those of the one filled by pristine ND. At a low-filler loading, the ND-XSBR exhibited an impressive toughening effect. The maximum flexural strength was shown when the filler loading was as low as 0.1 wt % for the EP/ND-XSBR nanocomposite. Furthermore, enhanced fracture toughness and fracture energy were shown by surface functionalization, representing enhanced compatibility between the ND-XSBR and EP matrix. The glass transition temperature (Tg) and storage modulus of the nanocomposites were studied, and the EP/ND-XSBR0.1 nanocomposite exhibited the highest Tg owing to the stronger interfacial interaction. The EP/ND-XSBR0.2 exhibited higher storage modulus and Tg than the EP/ND0.2, because the higher interfacial interaction can restrict the molecular mobility of the EP by the functionalized ND-XSBR.
| Original language | English |
|---|---|
| Pages (from-to) | 1890-1898 |
| Number of pages | 9 |
| Journal | Journal of Polymer Science, Part B: Polymer Physics |
| Volume | 55 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 15 Dec 2017 |
| Externally published | Yes |
Keywords
- epoxy
- interfaces
- interfacial interaction
- mechanical properties
- nanocomposites
- nanodiamond
- thermosets
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