Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/96699
Title: Temperature and pH dual-responsive behavior of polyhedral oligomeric silsesquioxane-based star-block copolymer with poly(acrylic acid-block-N-isopropylacrylamide) as arms
Authors: Bai, Yu
Wei, Jia
Yang, Liping
He, Chaobin
Lu, Xuehong
Issue Date: 2011
Source: 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.
Series/Report no.: Colloid and polymer science
Abstract: 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.
URI: https://hdl.handle.net/10356/96699
http://hdl.handle.net/10220/13089
DOI: http://dx.doi.org/10.1007/s00396-011-2562-1
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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