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Synthesis and light scattering study of microgels with interpenetrating polymer networks.

Abstract

Monodispersed microgels composed of poly(acrylic acid) (PAAc) and poly(N-isopropylacrylamide) (PNIPAM) interpenetrating polymer networks (IPN) were synthesized by a two-step method, first preparing PNIPAM microgel and then polymerizing acrylic acid that interpenetrates into the PNIPAM network. The growth kinetics of the IPN particle formation was obtained by measuring the turbidity and particle hydrodynamic radius (Rh) as a function of reaction time. IPN and PNIPAM microgels were characterized and compared by dynamic and static light scattering techniques. The concentrated aqueous solutions of the PNIPAM-PAAc IPN microgels exhibit an inverse thermoreversible gelation. In contrast to polymer solutions of poly(NIPAM-co-AAc) that have the inverse thermoreversible gelation, our system can self-assemble into an ordered structure, displaying bright colors. Furthermore, IPN microgels undergo the reversible volume phase transitions in response to both pH and temperature changes associated with PAAc and PNIPAM networks, respectively.

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  • Authors+Show Affiliations

    ,

    Departments of Physics and Chemistry, University of North Texas, Denton, Texas 76203, USA.

    Source

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    15835657

    Citation

    TY - JOUR T1 - Synthesis and light scattering study of microgels with interpenetrating polymer networks. AU - Xia,Xiaohu, AU - Hu,Zhibing, PY - 2005/4/20/pubmed PY - 2005/4/20/medline PY - 2005/4/20/entrez SP - 2094 EP - 8 JF - Langmuir : the ACS journal of surfaces and colloids JO - Langmuir VL - 20 IS - 6 N2 - Monodispersed microgels composed of poly(acrylic acid) (PAAc) and poly(N-isopropylacrylamide) (PNIPAM) interpenetrating polymer networks (IPN) were synthesized by a two-step method, first preparing PNIPAM microgel and then polymerizing acrylic acid that interpenetrates into the PNIPAM network. The growth kinetics of the IPN particle formation was obtained by measuring the turbidity and particle hydrodynamic radius (Rh) as a function of reaction time. IPN and PNIPAM microgels were characterized and compared by dynamic and static light scattering techniques. The concentrated aqueous solutions of the PNIPAM-PAAc IPN microgels exhibit an inverse thermoreversible gelation. In contrast to polymer solutions of poly(NIPAM-co-AAc) that have the inverse thermoreversible gelation, our system can self-assemble into an ordered structure, displaying bright colors. Furthermore, IPN microgels undergo the reversible volume phase transitions in response to both pH and temperature changes associated with PAAc and PNIPAM networks, respectively. SN - 0743-7463 UR - https://www.unboundmedicine.com/medline/citation/15835657/Synthesis_and_light_scattering_study_of_microgels_with_interpenetrating_polymer_networks_ L2 - https://www.lens.org/lens/search?q=citation_id:15835657 ER -
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