Structure-property-processing studies of polymer nanocomposites
A novel amorphous polyamide/montmorillonite nanocomposite based on poly(hexamethylene isophthalamide) was successfully prepared by melt intercalation. Wide angle X-ray diffraction and transmission electron microscopy showed that organoclay containing quaternary amine surfactants with phenyl and hydr...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Research Report |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/42262 |
| _version_ | 1811687333057003520 |
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| author | Loo, Leslie Sun Sun Zhang, Xingui |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Loo, Leslie Sun Sun Zhang, Xingui |
| author_sort | Loo, Leslie Sun Sun |
| collection | NTU |
| description | A novel amorphous polyamide/montmorillonite nanocomposite based on poly(hexamethylene isophthalamide) was successfully prepared by melt intercalation. Wide angle X-ray diffraction and transmission electron microscopy showed that organoclay containing quaternary amine surfactants with phenyl and hydroxyl groups was delaminated in the polymer matrix, resulting in well-exfoliated morphologies even at high montmorillonite content. Differential scanning calorimetry results indicated that clay platelets did not induce the formation of a crystalline phase in this amorphous polymer. Tensile tests demonstrated that the addition of nanoclay caused a dramatic increase in Young’s modulus (almost twofold) and yield strength of the nanocomposites compared to the homopolymer. The nanocomposites exhibited ductile behavior up to 5 wt% of nanoclay. The improvement in Young’s modulus is comparable with semicrystalline aliphatic nylon 6 nanocomposites. Both the main chain amide groups and the amorphous nature of the polyamide are responsible for enhancing the dispersion of the nano-fillers, thereby leading to improved properties of the nanocomposites. The structure-property relationship for these nanocomposites was also explored. Thermal oxidative degradation of the polymer nanocomposites was studied by thermogravimetric analysis (TGA). TGA results demonstrated that the addition of organoclay resulted in a substantial increase (30°C) in the onset degradation temperature of the nanocomposites as compared to the homopolymer. The protective effect is mainly due to the confinement and barrier effect of the nanoclay. Nylon 6/nanoclay nanocomposites exposed to oxygen plasma also showed better abrasion resistance compared to pure nylon 6. |
| first_indexed | 2024-10-01T05:14:38Z |
| format | Research Report |
| id | ntu-10356/42262 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:14:38Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/422622023-03-03T15:30:34Z Structure-property-processing studies of polymer nanocomposites Loo, Leslie Sun Sun Zhang, Xingui School of Chemical and Biomedical Engineering DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture A novel amorphous polyamide/montmorillonite nanocomposite based on poly(hexamethylene isophthalamide) was successfully prepared by melt intercalation. Wide angle X-ray diffraction and transmission electron microscopy showed that organoclay containing quaternary amine surfactants with phenyl and hydroxyl groups was delaminated in the polymer matrix, resulting in well-exfoliated morphologies even at high montmorillonite content. Differential scanning calorimetry results indicated that clay platelets did not induce the formation of a crystalline phase in this amorphous polymer. Tensile tests demonstrated that the addition of nanoclay caused a dramatic increase in Young’s modulus (almost twofold) and yield strength of the nanocomposites compared to the homopolymer. The nanocomposites exhibited ductile behavior up to 5 wt% of nanoclay. The improvement in Young’s modulus is comparable with semicrystalline aliphatic nylon 6 nanocomposites. Both the main chain amide groups and the amorphous nature of the polyamide are responsible for enhancing the dispersion of the nano-fillers, thereby leading to improved properties of the nanocomposites. The structure-property relationship for these nanocomposites was also explored. Thermal oxidative degradation of the polymer nanocomposites was studied by thermogravimetric analysis (TGA). TGA results demonstrated that the addition of organoclay resulted in a substantial increase (30°C) in the onset degradation temperature of the nanocomposites as compared to the homopolymer. The protective effect is mainly due to the confinement and barrier effect of the nanoclay. Nylon 6/nanoclay nanocomposites exposed to oxygen plasma also showed better abrasion resistance compared to pure nylon 6. RG3/04 2010-10-06T04:08:46Z 2010-10-06T04:08:46Z 2008 2008 Research Report http://hdl.handle.net/10356/42262 en 76 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture Loo, Leslie Sun Sun Zhang, Xingui Structure-property-processing studies of polymer nanocomposites |
| title | Structure-property-processing studies of polymer nanocomposites |
| title_full | Structure-property-processing studies of polymer nanocomposites |
| title_fullStr | Structure-property-processing studies of polymer nanocomposites |
| title_full_unstemmed | Structure-property-processing studies of polymer nanocomposites |
| title_short | Structure-property-processing studies of polymer nanocomposites |
| title_sort | structure property processing studies of polymer nanocomposites |
| topic | DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture |
| url | http://hdl.handle.net/10356/42262 |
| work_keys_str_mv | AT loolesliesunsun structurepropertyprocessingstudiesofpolymernanocomposites AT zhangxingui structurepropertyprocessingstudiesofpolymernanocomposites |