Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions
The steady shear, dynamic and extensional properties of four model associative polymer solutions (HASE) were examined in this study. The model HASE systems consist of a co-polymer of methacrylic acid/ethyl acrylate (0.49/0.50 mole ratio) with 0.01 mole fraction of hydrophobes of either a CO, CI2, CI...
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| Format: | Thesis |
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2008
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| Online Access: | http://hdl.handle.net/10356/6456 |
| _version_ | 1826125506926346240 |
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| author | Tan, Hendra. |
| author2 | Tam, Kam Chiu |
| author_facet | Tam, Kam Chiu Tan, Hendra. |
| author_sort | Tan, Hendra. |
| collection | NTU |
| description | The steady shear, dynamic and extensional properties of four model associative polymer solutions (HASE) were examined in this study. The model HASE systems consist of a co-polymer of methacrylic acid/ethyl acrylate (0.49/0.50 mole ratio) with 0.01 mole fraction of hydrophobes of either a CO, CI2, CI6 and C20 alkyl chains. The hydrophobe is extended from the backbone by a spacer chain of ~ 31 moles of polyethylene- oxide (PEO). At low pH, the polymer exists as insoluble latex particles, which dissolve upon neutralization to pH greater than 7. This gives rise to a large increase in the viscosity, which is attributed to hydrophobic associations and the expansion of the polyelectrolyte backbones. |
| first_indexed | 2024-10-01T06:37:25Z |
| format | Thesis |
| id | ntu-10356/6456 |
| institution | Nanyang Technological University |
| last_indexed | 2024-10-01T06:37:25Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/64562023-03-11T17:24:44Z Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions Tan, Hendra. Tam, Kam Chiu School of Mechanical and Production Engineering DRNTU::Engineering::Materials::Organic/Polymer electronics The steady shear, dynamic and extensional properties of four model associative polymer solutions (HASE) were examined in this study. The model HASE systems consist of a co-polymer of methacrylic acid/ethyl acrylate (0.49/0.50 mole ratio) with 0.01 mole fraction of hydrophobes of either a CO, CI2, CI6 and C20 alkyl chains. The hydrophobe is extended from the backbone by a spacer chain of ~ 31 moles of polyethylene- oxide (PEO). At low pH, the polymer exists as insoluble latex particles, which dissolve upon neutralization to pH greater than 7. This gives rise to a large increase in the viscosity, which is attributed to hydrophobic associations and the expansion of the polyelectrolyte backbones. Master of Engineering (MPE) 2008-09-17T11:15:24Z 2008-09-17T11:15:24Z 2000 2000 Thesis http://hdl.handle.net/10356/6456 Nanyang Technological University application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Organic/Polymer electronics Tan, Hendra. Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions |
| title | Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions |
| title_full | Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions |
| title_fullStr | Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions |
| title_full_unstemmed | Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions |
| title_short | Extensional and viscoelastic properties of hydrophobically-modified alkali-soluble associative (HASE) polymer solutions |
| title_sort | extensional and viscoelastic properties of hydrophobically modified alkali soluble associative hase polymer solutions |
| topic | DRNTU::Engineering::Materials::Organic/Polymer electronics |
| url | http://hdl.handle.net/10356/6456 |
| work_keys_str_mv | AT tanhendra extensionalandviscoelasticpropertiesofhydrophobicallymodifiedalkalisolubleassociativehasepolymersolutions |