Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms
Poly(acrylic acid-block-N-isopropylacrylamide) (PAAc-b-PNIPAm)-tethered octafunctional polyhedral oligomeric silsesquioxane (POSS) were synthesized via POSSinitialized atom transfer radical polymerization. When very short PAAc blocks are placed between the POSS core and PNIPAm short chains, the...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96699 http://hdl.handle.net/10220/13089 |
| _version_ | 1826129216408649728 |
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| author | Bai, Yu Wei, Jia Yang, Liping He, Chaobin Lu, Xuehong |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Bai, Yu Wei, Jia Yang, Liping He, Chaobin Lu, Xuehong |
| author_sort | Bai, Yu |
| collection | NTU |
| description | Poly(acrylic acid-block-N-isopropylacrylamide)
(PAAc-b-PNIPAm)-tethered octafunctional polyhedral oligomeric
silsesquioxane (POSS) were synthesized via POSSinitialized
atom transfer radical polymerization. When very
short PAAc blocks are placed between the POSS core and
PNIPAm short chains, the critical temperature (Tc) of POSSPAAc-
b-PNIPAm determined by cloud point measurements
varies in a wide temperature range with pH, and its Tc is
even lower than that of POSS-PNIPAm with similar chain
length at pH05.0, indicating a synergic effect between
high local chain density and intramolecular interaction
between PAAc and PNIPAm. When the PAAc blocks
are relatively long, the pH response of POSS-PAAc-b-
PNIPAm diminishes owing to the reduced local PNIPAm
chain density. |
| first_indexed | 2024-10-01T07:37:03Z |
| format | Journal Article |
| id | ntu-10356/96699 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:37:03Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/966992020-06-01T10:26:39Z Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms Bai, Yu Wei, Jia Yang, Liping He, Chaobin Lu, Xuehong School of Materials Science & Engineering Poly(acrylic acid-block-N-isopropylacrylamide) (PAAc-b-PNIPAm)-tethered octafunctional polyhedral oligomeric silsesquioxane (POSS) were synthesized via POSSinitialized atom transfer radical polymerization. When very short PAAc blocks are placed between the POSS core and PNIPAm short chains, the critical temperature (Tc) of POSSPAAc- b-PNIPAm determined by cloud point measurements varies in a wide temperature range with pH, and its Tc is even lower than that of POSS-PNIPAm with similar chain length at pH05.0, indicating a synergic effect between high local chain density and intramolecular interaction between PAAc and PNIPAm. When the PAAc blocks are relatively long, the pH response of POSS-PAAc-b- PNIPAm diminishes owing to the reduced local PNIPAm chain density. 2013-08-12T08:55:26Z 2019-12-06T19:34:03Z 2013-08-12T08:55:26Z 2019-12-06T19:34:03Z 2011 2011 Journal Article Bai, Y., Wei, J., Yang, L., He, C.,& Lu, X. (2012). Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms. Colloid and Polymer Science, 290(6), 507-515. https://hdl.handle.net/10356/96699 http://hdl.handle.net/10220/13089 10.1007/s00396-011-2562-1 en Colloid and polymer science |
| spellingShingle | Bai, Yu Wei, Jia Yang, Liping He, Chaobin Lu, Xuehong Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms |
| title | Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms |
| title_full | Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms |
| title_fullStr | Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms |
| title_full_unstemmed | Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms |
| title_short | Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms |
| title_sort | temperature and ph dual responsive behavior of polyhedral oligomeric silsesquioxane based star block copolymer with poly acrylic acid block n isopropylacrylamide as arms |
| url | https://hdl.handle.net/10356/96699 http://hdl.handle.net/10220/13089 |
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