Abstract
Nanocomposite of polyurethane (PU), Nylon66 (nylon), and montmorillonite (MMT) was prepared by a twin screw extruder, and the dispersion of MMT and the mechanical properties of the nanocomposite were analyzed. Dimethyl hydrogenated tallow 2-ethylhexyl ammonium modified Cloisite 25A (C25A) and methyl tallow bis-2-hydroxyethyl ammonium modified Cloisite 30B (C30B) were used as MMT. XRD and TEM analysis indicated that the continuous melt mixing by a twin screw extruder was effective in MMT dispersion. C30B having hydroxyl group on its surface has better dispersion than C25A in the PU/nylon matrix. Maximum stress and strain at break were the maximum at 1 wt% MMT regardless of matrix composition, and decreased at higher MMT content. Best MMT dispersion was also observed at 1 wt% MMT for the entire matrix composition. Aggregation of MMT occurred at MMT content higher than 1 wt%. Nylon addition also induced the aggregation of MMT because of the high polarity of nylon surface. Dispersion of MMT was very important in improving the mechanical properties of PU/nylon nanocomposite.
| Original language | English |
|---|---|
| Pages (from-to) | 43-49 |
| Number of pages | 7 |
| Journal | Fibers and Polymers |
| Volume | 8 |
| Issue number | 1 |
| DOIs | |
| State | Published - Feb 2007 |
| Externally published | Yes |
Funding
The authors of this paper would like to thank the Korea Science and Engineering Foundation (KOSEF) for sponsoring this research through the SRC/ERC Program of MOST/ KOSEF (R11-2005-065), Authors also wish to express thanks to Dr. Robert Cieslinski of Dow Chemical for his TEM work.
| Funders | Funder number |
|---|---|
| Ministry of Science and Technology | R11-2005-065 |
| Korea Science and Engineering Foundation |
Keywords
- Mechanical property
- Montmorillonite
- Nanocomposite
- Nylon
- Polyurethane