Synthesis and micellization of thermo- and pH-responsive block copolymer of poly( N-isopropylacrylamide)- block-poly(4-vinylpyridine)
A novel double-hydrophilic block copolymer poly( N-isopropylacrylamide)- block-poly(4-vinylpyridine) (PNIPAM- b-P4VP) with low polydispersity which could respond to both temperature and pH stimuli in aqueous solution was synthesized by atom transfer radical polymerization. Micellization of the copol...
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Veröffentlicht in: | Polymer (Guilford) 2007-03, Vol.48 (6), p.1711-1717 |
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container_title | Polymer (Guilford) |
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creator | Xu, Yanling Shi, Linqi Ma, Rujiang Zhang, Wangqing An, Yingli Zhu, X.X. |
description | A novel double-hydrophilic block copolymer poly(
N-isopropylacrylamide)-
block-poly(4-vinylpyridine) (PNIPAM-
b-P4VP) with low polydispersity which could respond to both temperature and pH stimuli in aqueous solution was synthesized by atom transfer radical polymerization. Micellization of the copolymer in aqueous solution was characterized by dynamic and static laser scattering,
1H NMR and transmission electron microscopy. In aqueous solution, the copolymer existed as unimer at pH 2.8 at 25
°C. When the temperature was raised to 50
°C at pH 2.8, the copolymer associated into spherical core–shell micelles with the PNIPAM block forming the core and the P4VP block forming the shell. On the other hand, when pH was increased from 2.8 to 6.5 at 25
°C, the copolymer associated into spherical core–shell micelles with the core formed by the P4VP block and the shell formed by the PNIPAM block. The process was reversible. The critical aggregation temperature of the block copolymer is 36
°C, and the critical aggregation pH value is 4.7. |
doi_str_mv | 10.1016/j.polymer.2007.01.022 |
format | Article |
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N-isopropylacrylamide)-
block-poly(4-vinylpyridine) (PNIPAM-
b-P4VP) with low polydispersity which could respond to both temperature and pH stimuli in aqueous solution was synthesized by atom transfer radical polymerization. Micellization of the copolymer in aqueous solution was characterized by dynamic and static laser scattering,
1H NMR and transmission electron microscopy. In aqueous solution, the copolymer existed as unimer at pH 2.8 at 25
°C. When the temperature was raised to 50
°C at pH 2.8, the copolymer associated into spherical core–shell micelles with the PNIPAM block forming the core and the P4VP block forming the shell. On the other hand, when pH was increased from 2.8 to 6.5 at 25
°C, the copolymer associated into spherical core–shell micelles with the core formed by the P4VP block and the shell formed by the PNIPAM block. The process was reversible. The critical aggregation temperature of the block copolymer is 36
°C, and the critical aggregation pH value is 4.7.</description><identifier>ISSN: 0032-3861</identifier><identifier>EISSN: 1873-2291</identifier><identifier>DOI: 10.1016/j.polymer.2007.01.022</identifier><identifier>CODEN: POLMAG</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Applied sciences ; Copolymerization ; Double-hydrophilic ; Exact sciences and technology ; Organic polymers ; pH-responsive ; Physicochemistry of polymers ; Preparation, kinetics, thermodynamics, mechanism and catalysts ; Thermo-responsive</subject><ispartof>Polymer (Guilford), 2007-03, Vol.48 (6), p.1711-1717</ispartof><rights>2007 Elsevier Ltd</rights><rights>2007 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c436t-8e84022ea48fc8d4af6747f687f2e1df9163ba496c479753f8e86a7425f78c333</citedby><cites>FETCH-LOGICAL-c436t-8e84022ea48fc8d4af6747f687f2e1df9163ba496c479753f8e86a7425f78c333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.polymer.2007.01.022$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=18588620$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Xu, Yanling</creatorcontrib><creatorcontrib>Shi, Linqi</creatorcontrib><creatorcontrib>Ma, Rujiang</creatorcontrib><creatorcontrib>Zhang, Wangqing</creatorcontrib><creatorcontrib>An, Yingli</creatorcontrib><creatorcontrib>Zhu, X.X.</creatorcontrib><title>Synthesis and micellization of thermo- and pH-responsive block copolymer of poly( N-isopropylacrylamide)- block-poly(4-vinylpyridine)</title><title>Polymer (Guilford)</title><description>A novel double-hydrophilic block copolymer poly(
N-isopropylacrylamide)-
block-poly(4-vinylpyridine) (PNIPAM-
b-P4VP) with low polydispersity which could respond to both temperature and pH stimuli in aqueous solution was synthesized by atom transfer radical polymerization. Micellization of the copolymer in aqueous solution was characterized by dynamic and static laser scattering,
1H NMR and transmission electron microscopy. In aqueous solution, the copolymer existed as unimer at pH 2.8 at 25
°C. When the temperature was raised to 50
°C at pH 2.8, the copolymer associated into spherical core–shell micelles with the PNIPAM block forming the core and the P4VP block forming the shell. On the other hand, when pH was increased from 2.8 to 6.5 at 25
°C, the copolymer associated into spherical core–shell micelles with the core formed by the P4VP block and the shell formed by the PNIPAM block. The process was reversible. The critical aggregation temperature of the block copolymer is 36
°C, and the critical aggregation pH value is 4.7.</description><subject>Applied sciences</subject><subject>Copolymerization</subject><subject>Double-hydrophilic</subject><subject>Exact sciences and technology</subject><subject>Organic polymers</subject><subject>pH-responsive</subject><subject>Physicochemistry of polymers</subject><subject>Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><subject>Thermo-responsive</subject><issn>0032-3861</issn><issn>1873-2291</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><recordid>eNqFkE9v1DAQxS1EJZbCR0DKBUQPDv4X2zkhVAFFquihcLZcZyy8JHaw05XSe783Tncljlw8lub35s0bhN5Q0lJC5Yd9O6dxnSC3jBDVEtoSxp6hHdWKY8Z6-hztCOEMcy3pC_SylD0hhHVM7NDj7RqXX1BCaWwcmik4GMfwYJeQYpN8U3t5SvipOV_hDGVOsYQDNHdjcr8bl07eG7x93zffcShpzmleR-tyfaYwwAU-CvATI_AhxHWc1xyGEOHiFTrzdizw-lTP0c8vn39cXuHrm6_fLj9dYye4XLAGLWo0sEJ7pwdhvVRCeamVZ0AH31PJ76zopROqVx33VSCtEqzzSjvO-Tl6d5xb1_tzD2UxUyhbYhsh3RfD-r6jvRAV7I6gy6mUDN7MOUw2r4YSsx3d7M0puNmObgg1dbOqe3sysMXZ0WcbXSj_xLrTWjJSuY9HDmraQ6hTigsQHQwhg1vMkMJ_nP4CFz2dGg</recordid><startdate>20070301</startdate><enddate>20070301</enddate><creator>Xu, Yanling</creator><creator>Shi, Linqi</creator><creator>Ma, Rujiang</creator><creator>Zhang, Wangqing</creator><creator>An, Yingli</creator><creator>Zhu, X.X.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope></search><sort><creationdate>20070301</creationdate><title>Synthesis and micellization of thermo- and pH-responsive block copolymer of poly( N-isopropylacrylamide)- block-poly(4-vinylpyridine)</title><author>Xu, Yanling ; Shi, Linqi ; Ma, Rujiang ; Zhang, Wangqing ; An, Yingli ; Zhu, X.X.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c436t-8e84022ea48fc8d4af6747f687f2e1df9163ba496c479753f8e86a7425f78c333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2007</creationdate><topic>Applied sciences</topic><topic>Copolymerization</topic><topic>Double-hydrophilic</topic><topic>Exact sciences and technology</topic><topic>Organic polymers</topic><topic>pH-responsive</topic><topic>Physicochemistry of polymers</topic><topic>Preparation, kinetics, thermodynamics, mechanism and catalysts</topic><topic>Thermo-responsive</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xu, Yanling</creatorcontrib><creatorcontrib>Shi, Linqi</creatorcontrib><creatorcontrib>Ma, Rujiang</creatorcontrib><creatorcontrib>Zhang, Wangqing</creatorcontrib><creatorcontrib>An, Yingli</creatorcontrib><creatorcontrib>Zhu, X.X.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><jtitle>Polymer (Guilford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xu, Yanling</au><au>Shi, Linqi</au><au>Ma, Rujiang</au><au>Zhang, Wangqing</au><au>An, Yingli</au><au>Zhu, X.X.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Synthesis and micellization of thermo- and pH-responsive block copolymer of poly( N-isopropylacrylamide)- block-poly(4-vinylpyridine)</atitle><jtitle>Polymer (Guilford)</jtitle><date>2007-03-01</date><risdate>2007</risdate><volume>48</volume><issue>6</issue><spage>1711</spage><epage>1717</epage><pages>1711-1717</pages><issn>0032-3861</issn><eissn>1873-2291</eissn><coden>POLMAG</coden><abstract>A novel double-hydrophilic block copolymer poly(
N-isopropylacrylamide)-
block-poly(4-vinylpyridine) (PNIPAM-
b-P4VP) with low polydispersity which could respond to both temperature and pH stimuli in aqueous solution was synthesized by atom transfer radical polymerization. Micellization of the copolymer in aqueous solution was characterized by dynamic and static laser scattering,
1H NMR and transmission electron microscopy. In aqueous solution, the copolymer existed as unimer at pH 2.8 at 25
°C. When the temperature was raised to 50
°C at pH 2.8, the copolymer associated into spherical core–shell micelles with the PNIPAM block forming the core and the P4VP block forming the shell. On the other hand, when pH was increased from 2.8 to 6.5 at 25
°C, the copolymer associated into spherical core–shell micelles with the core formed by the P4VP block and the shell formed by the PNIPAM block. The process was reversible. The critical aggregation temperature of the block copolymer is 36
°C, and the critical aggregation pH value is 4.7.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.polymer.2007.01.022</doi><tpages>7</tpages></addata></record> |
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subjects | Applied sciences Copolymerization Double-hydrophilic Exact sciences and technology Organic polymers pH-responsive Physicochemistry of polymers Preparation, kinetics, thermodynamics, mechanism and catalysts Thermo-responsive |
title | Synthesis and micellization of thermo- and pH-responsive block copolymer of poly( N-isopropylacrylamide)- block-poly(4-vinylpyridine) |
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