Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies
Atom transfer radical polymerisation (ATRP) technique was used to synthesize poly(methacrylic acid-block-methyl methacrylate) (P(MAA₁₀₂-b-MMA₁₀)) copolymer in order to study the aggregation behavior in aqueous solution over the course of neutralization. A combination of static and dynamic light scat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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2003
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| Online Access: | http://hdl.handle.net/1721.1/3775 |
| _version_ | 1826217794512879616 |
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| author | Palaniswamy, R. Wang, C Tam, Michael K. C. Gan, L.H. |
| author_facet | Palaniswamy, R. Wang, C Tam, Michael K. C. Gan, L.H. |
| author_sort | Palaniswamy, R. |
| collection | MIT |
| description | Atom transfer radical polymerisation (ATRP) technique was used to synthesize poly(methacrylic acid-block-methyl methacrylate) (P(MAA₁₀₂-b-MMA₁₀)) copolymer in order to study the aggregation behavior in aqueous solution over the course of neutralization. A combination of static and dynamic light scattering (SLS, DLS) and potentiometric titration techniques were used to investigate the size and shape of the micelle at various degrees of neutralization. The hydrodynamic radius (Rh) determined from dynamic light scattering increases from ~26nm (for unneutralized) to ~42nm (for completely neutralized sample). Both potentiometric and laser light scattering studies indicate the formation of a core shell micelle. The weighted average molecular weights of the polymer and micelle are 1.18x10⁴ and 2.25 x 10⁵ g/mol respectively, which suggests that the aggregation number of the micelle is ~20. |
| first_indexed | 2024-09-23T17:09:16Z |
| format | Article |
| id | mit-1721.1/3775 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:09:16Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | mit-1721.1/37752019-04-12T08:36:53Z Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies Palaniswamy, R. Wang, C Tam, Michael K. C. Gan, L.H. ATRP aggregation number core shell micelle light scattering potentiometric titration Atom transfer radical polymerisation (ATRP) technique was used to synthesize poly(methacrylic acid-block-methyl methacrylate) (P(MAA₁₀₂-b-MMA₁₀)) copolymer in order to study the aggregation behavior in aqueous solution over the course of neutralization. A combination of static and dynamic light scattering (SLS, DLS) and potentiometric titration techniques were used to investigate the size and shape of the micelle at various degrees of neutralization. The hydrodynamic radius (Rh) determined from dynamic light scattering increases from ~26nm (for unneutralized) to ~42nm (for completely neutralized sample). Both potentiometric and laser light scattering studies indicate the formation of a core shell micelle. The weighted average molecular weights of the polymer and micelle are 1.18x10⁴ and 2.25 x 10⁵ g/mol respectively, which suggests that the aggregation number of the micelle is ~20. Singapore-MIT Alliance (SMA) 2003-12-08T15:00:51Z 2003-12-08T15:00:51Z 2003-01 Article http://hdl.handle.net/1721.1/3775 en_US Molecular Engineering of Biological and Chemical Systems (MEBCS); 351681 bytes application/pdf application/pdf |
| spellingShingle | ATRP aggregation number core shell micelle light scattering potentiometric titration Palaniswamy, R. Wang, C Tam, Michael K. C. Gan, L.H. Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies |
| title | Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies |
| title_full | Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies |
| title_fullStr | Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies |
| title_full_unstemmed | Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies |
| title_short | Association Behavior of Poly(methacrylic acid)-block-Poly(methyl methacrylate) in Aqueous Medium: Potentiometric and Laser Light Scattering Studies |
| title_sort | association behavior of poly methacrylic acid block poly methyl methacrylate in aqueous medium potentiometric and laser light scattering studies |
| topic | ATRP aggregation number core shell micelle light scattering potentiometric titration |
| url | http://hdl.handle.net/1721.1/3775 |
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