On the stability and properties of the polyacrylate/Na-MMT nanocomposite obtained by seeded emulsion polymerization
[Display omitted] ► Polyacrylate/Na+-MMT nanocomposite was synthesized by seeded emulsion polymerization. ► The polymeric stabilizer helped to increase the latex stability. ► Nanocomposite latex showed very fine particle size and narrow size distribution. ► A mostly exfoliated nanocomposite was obta...
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| Veröffentlicht in: | European polymer journal 2012-10, Vol.48 (10), p.1683-1695 |
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| container_title | European polymer journal |
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| creator | Yılmaz, Onur Cheaburu, Catalina N. Gülümser, Gürbüz Vasile, Cornelia |
| description | [Display omitted]
► Polyacrylate/Na+-MMT nanocomposite was synthesized by seeded emulsion polymerization. ► The polymeric stabilizer helped to increase the latex stability. ► Nanocomposite latex showed very fine particle size and narrow size distribution. ► A mostly exfoliated nanocomposite was obtained. ► The increase in E′ of the nanocomposite was very drastic.
For high performance waterborne coatings usually polymer latexes with low emulsifier content are more preferred. Although polymer/clay nanocomposites offer improved properties, it is difficult to produce clay based nanocomposite latexes containing low emulsifier due to the stabilization problems especially caused by organoclays. Present study deals with the preparation of a tBA/BA/MAA ternary copolymer/clay nanocomposite containing 3wt.% sodium montmorillonite (Na+-MMT) via seeded emulsion polymerization. Experimentally it was observed that even the usage of hydrophilic clay caused stabilization problem and a certain amount of emulsifier (>1wt.%) was necessary to obtain stable latexes. In addition, the usage of a low molecular weight water soluble polymer as steric barrier was found to increase the stability of system. Obtained nanocomposite latex showed fine particle size diameter (127nm) and very narrow size distribution (PDI=0.06). The WAXD and TEM investigations indicated that a mostly exfoliated nanocomposite was obtained. Thermal analyses (DSC, DMTA and TGA) showed that there was no change at Tg of the copolymer while very high improvement was obtained for elastic modulus and a slight increase in thermal stability. According to the rheological measurements, the nanocomposite latex showed a higher low shear viscosity, a stronger shear thinning behavior and an improved physical stability in comparison to the reference latex. |
| doi_str_mv | 10.1016/j.eurpolymj.2012.07.010 |
| format | Article |
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► Polyacrylate/Na+-MMT nanocomposite was synthesized by seeded emulsion polymerization. ► The polymeric stabilizer helped to increase the latex stability. ► Nanocomposite latex showed very fine particle size and narrow size distribution. ► A mostly exfoliated nanocomposite was obtained. ► The increase in E′ of the nanocomposite was very drastic.
For high performance waterborne coatings usually polymer latexes with low emulsifier content are more preferred. Although polymer/clay nanocomposites offer improved properties, it is difficult to produce clay based nanocomposite latexes containing low emulsifier due to the stabilization problems especially caused by organoclays. Present study deals with the preparation of a tBA/BA/MAA ternary copolymer/clay nanocomposite containing 3wt.% sodium montmorillonite (Na+-MMT) via seeded emulsion polymerization. Experimentally it was observed that even the usage of hydrophilic clay caused stabilization problem and a certain amount of emulsifier (>1wt.%) was necessary to obtain stable latexes. In addition, the usage of a low molecular weight water soluble polymer as steric barrier was found to increase the stability of system. Obtained nanocomposite latex showed fine particle size diameter (127nm) and very narrow size distribution (PDI=0.06). The WAXD and TEM investigations indicated that a mostly exfoliated nanocomposite was obtained. Thermal analyses (DSC, DMTA and TGA) showed that there was no change at Tg of the copolymer while very high improvement was obtained for elastic modulus and a slight increase in thermal stability. According to the rheological measurements, the nanocomposite latex showed a higher low shear viscosity, a stronger shear thinning behavior and an improved physical stability in comparison to the reference latex.</description><identifier>ISSN: 0014-3057</identifier><identifier>EISSN: 1873-1945</identifier><identifier>DOI: 10.1016/j.eurpolymj.2012.07.010</identifier><identifier>CODEN: EUPJAG</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Applied sciences ; Clay ; Clay (material) ; Composites ; Copolymers ; Emulsifiers ; Emulsion polymerization ; Exact sciences and technology ; Forms of application and semi-finished materials ; Latex ; Nanocomposites ; Nanostructure ; Polymer industry, paints, wood ; Seeded emulsion polymerization ; Sodium montmorillonite ; Stability ; Stabilization ; Technology of polymers</subject><ispartof>European polymer journal, 2012-10, Vol.48 (10), p.1683-1695</ispartof><rights>2012 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c419t-dcfbc2671d29ec76fe50a3751f1e604b778c9e1f3ff8576e2cfb11b34d32f4c13</citedby><cites>FETCH-LOGICAL-c419t-dcfbc2671d29ec76fe50a3751f1e604b778c9e1f3ff8576e2cfb11b34d32f4c13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0014305712002285$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26414350$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yılmaz, Onur</creatorcontrib><creatorcontrib>Cheaburu, Catalina N.</creatorcontrib><creatorcontrib>Gülümser, Gürbüz</creatorcontrib><creatorcontrib>Vasile, Cornelia</creatorcontrib><title>On the stability and properties of the polyacrylate/Na-MMT nanocomposite obtained by seeded emulsion polymerization</title><title>European polymer journal</title><description>[Display omitted]
► Polyacrylate/Na+-MMT nanocomposite was synthesized by seeded emulsion polymerization. ► The polymeric stabilizer helped to increase the latex stability. ► Nanocomposite latex showed very fine particle size and narrow size distribution. ► A mostly exfoliated nanocomposite was obtained. ► The increase in E′ of the nanocomposite was very drastic.
For high performance waterborne coatings usually polymer latexes with low emulsifier content are more preferred. Although polymer/clay nanocomposites offer improved properties, it is difficult to produce clay based nanocomposite latexes containing low emulsifier due to the stabilization problems especially caused by organoclays. Present study deals with the preparation of a tBA/BA/MAA ternary copolymer/clay nanocomposite containing 3wt.% sodium montmorillonite (Na+-MMT) via seeded emulsion polymerization. Experimentally it was observed that even the usage of hydrophilic clay caused stabilization problem and a certain amount of emulsifier (>1wt.%) was necessary to obtain stable latexes. In addition, the usage of a low molecular weight water soluble polymer as steric barrier was found to increase the stability of system. Obtained nanocomposite latex showed fine particle size diameter (127nm) and very narrow size distribution (PDI=0.06). The WAXD and TEM investigations indicated that a mostly exfoliated nanocomposite was obtained. Thermal analyses (DSC, DMTA and TGA) showed that there was no change at Tg of the copolymer while very high improvement was obtained for elastic modulus and a slight increase in thermal stability. According to the rheological measurements, the nanocomposite latex showed a higher low shear viscosity, a stronger shear thinning behavior and an improved physical stability in comparison to the reference latex.</description><subject>Applied sciences</subject><subject>Clay</subject><subject>Clay (material)</subject><subject>Composites</subject><subject>Copolymers</subject><subject>Emulsifiers</subject><subject>Emulsion polymerization</subject><subject>Exact sciences and technology</subject><subject>Forms of application and semi-finished materials</subject><subject>Latex</subject><subject>Nanocomposites</subject><subject>Nanostructure</subject><subject>Polymer industry, paints, wood</subject><subject>Seeded emulsion polymerization</subject><subject>Sodium montmorillonite</subject><subject>Stability</subject><subject>Stabilization</subject><subject>Technology of polymers</subject><issn>0014-3057</issn><issn>1873-1945</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkE9P3DAQxa2qSN0CnwFfKnFJmImTeHNEqNBK_LnQs-U4Y9WrxA62t1L49M2yiCunmdH83jzNY-wCoUTA9mpX0j7OYVymXVkBViXIEhC-sA1upSiwq5uvbAOAdSGgkd_Y95R2ACBFKzYsPXme_xJPWfdudHnh2g98jmGmmB0lHuzb_mCgTVxGnenqURcPD8_cax9MmOaQXCYe-qydp4H3C09Ew9rRtB-TC_5NPVF0rzqv4xk7sXpMdP5eT9mf25_PN7-K-6e73zfX94WpscvFYGxvqlbiUHVkZGupAS1kgxaphbqXcms6Qius3TaypWrlEXtRD6KytUFxyi6Pd9d3XvaUsppcMjSO2lPYJ4Vtg6KDDmBF5RE1MaQUyao5uknHRSGoQ8xqpz5iVoeYFUi1xrwqf7yb6GT0aKP2xqUPedXWWIvmwF0fOVo__ucoqmQceUODi2SyGoL71Os_btSa1A</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Yılmaz, Onur</creator><creator>Cheaburu, Catalina N.</creator><creator>Gülümser, Gürbüz</creator><creator>Vasile, Cornelia</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20121001</creationdate><title>On the stability and properties of the polyacrylate/Na-MMT nanocomposite obtained by seeded emulsion polymerization</title><author>Yılmaz, Onur ; Cheaburu, Catalina N. ; Gülümser, Gürbüz ; Vasile, Cornelia</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c419t-dcfbc2671d29ec76fe50a3751f1e604b778c9e1f3ff8576e2cfb11b34d32f4c13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Applied sciences</topic><topic>Clay</topic><topic>Clay (material)</topic><topic>Composites</topic><topic>Copolymers</topic><topic>Emulsifiers</topic><topic>Emulsion polymerization</topic><topic>Exact sciences and technology</topic><topic>Forms of application and semi-finished materials</topic><topic>Latex</topic><topic>Nanocomposites</topic><topic>Nanostructure</topic><topic>Polymer industry, paints, wood</topic><topic>Seeded emulsion polymerization</topic><topic>Sodium montmorillonite</topic><topic>Stability</topic><topic>Stabilization</topic><topic>Technology of polymers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yılmaz, Onur</creatorcontrib><creatorcontrib>Cheaburu, Catalina N.</creatorcontrib><creatorcontrib>Gülümser, Gürbüz</creatorcontrib><creatorcontrib>Vasile, Cornelia</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>European polymer journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yılmaz, Onur</au><au>Cheaburu, Catalina N.</au><au>Gülümser, Gürbüz</au><au>Vasile, Cornelia</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>On the stability and properties of the polyacrylate/Na-MMT nanocomposite obtained by seeded emulsion polymerization</atitle><jtitle>European polymer journal</jtitle><date>2012-10-01</date><risdate>2012</risdate><volume>48</volume><issue>10</issue><spage>1683</spage><epage>1695</epage><pages>1683-1695</pages><issn>0014-3057</issn><eissn>1873-1945</eissn><coden>EUPJAG</coden><abstract>[Display omitted]
► Polyacrylate/Na+-MMT nanocomposite was synthesized by seeded emulsion polymerization. ► The polymeric stabilizer helped to increase the latex stability. ► Nanocomposite latex showed very fine particle size and narrow size distribution. ► A mostly exfoliated nanocomposite was obtained. ► The increase in E′ of the nanocomposite was very drastic.
For high performance waterborne coatings usually polymer latexes with low emulsifier content are more preferred. Although polymer/clay nanocomposites offer improved properties, it is difficult to produce clay based nanocomposite latexes containing low emulsifier due to the stabilization problems especially caused by organoclays. Present study deals with the preparation of a tBA/BA/MAA ternary copolymer/clay nanocomposite containing 3wt.% sodium montmorillonite (Na+-MMT) via seeded emulsion polymerization. Experimentally it was observed that even the usage of hydrophilic clay caused stabilization problem and a certain amount of emulsifier (>1wt.%) was necessary to obtain stable latexes. In addition, the usage of a low molecular weight water soluble polymer as steric barrier was found to increase the stability of system. Obtained nanocomposite latex showed fine particle size diameter (127nm) and very narrow size distribution (PDI=0.06). The WAXD and TEM investigations indicated that a mostly exfoliated nanocomposite was obtained. Thermal analyses (DSC, DMTA and TGA) showed that there was no change at Tg of the copolymer while very high improvement was obtained for elastic modulus and a slight increase in thermal stability. According to the rheological measurements, the nanocomposite latex showed a higher low shear viscosity, a stronger shear thinning behavior and an improved physical stability in comparison to the reference latex.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.eurpolymj.2012.07.010</doi><tpages>13</tpages></addata></record> |
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| subjects | Applied sciences Clay Clay (material) Composites Copolymers Emulsifiers Emulsion polymerization Exact sciences and technology Forms of application and semi-finished materials Latex Nanocomposites Nanostructure Polymer industry, paints, wood Seeded emulsion polymerization Sodium montmorillonite Stability Stabilization Technology of polymers |
| title | On the stability and properties of the polyacrylate/Na-MMT nanocomposite obtained by seeded emulsion polymerization |
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